矿井无线传输测试分析与矿用5G优选工作频段研究

孙继平; 彭铭; 刘斌

doi:10.13272/j.issn.1671-251x.18221

矿井无线传输测试分析与矿用5G优选工作频段研究

1.
中国矿业大学（北京）人工智能学院，北京　100083
2.
国家能源集团宁夏煤业有限责任公司羊场湾煤矿，宁夏银川　750408

基金项目: 国家自然科学基金面上项目（52074305）；国家重点研发计划项目（2016YFC0801800）。

详细信息

作者简介:
孙继平（1958—），男，山西翼城人，教授，博士，博士研究生导师，中国矿业大学（北京）原副校长；获国家科技进步奖和技术发明奖二等奖4项（第1完成人3项）；作为第1完成人获省部级科技进步特等奖和一等奖9项；作为第１完成人主持制定中华人民共和国煤炭行业、安全生产行业和能源行业标准51项；作为第１发明人获国家授权发明专利130余件；主持制定《煤矿安全规程》第十一章“监控与通信”；被SCI和EI检索的第1作者或独立完成论文100余篇；作为第1作者或独立完成著作12部；作为国务院煤矿事故调查专家组组长参加了10起煤矿特别重大事故调查工作；E-mail：sjp@cumtb.edu.cn

中图分类号: TD655
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出版历程
- 收稿日期: 2024-10-12
- 修回日期: 2024-10-20
- 网络出版日期: 2024-11-10
- 刊出日期: 2024-10-29

Analysis of wireless transmission tests in mines and preferred working frequency bands for mining 5G

1.
School of Artificial Intelligence, China University of Mining and Technology-Beijing, Beijing 100083, China
2.
Yangchangwan Coal Mine, CHN Energy Ningxia Coal Industry Co., Ltd., Yinchuan 750408, China

摘要

摘要: 矿井移动通信系统、人员和车辆定位系统等的研发和布置，需进行矿井无线传输特性分析，优选无线工作频段，优化无线通信基站和定位分站布置。在矿井拐弯巷道、分支巷道、辅助运输大巷、掘进巷道、综采工作面中进行了350 MHz～6 GHz较大频率范围的无线传输测试，并对测试结果进行了分析，揭示了矿井无线传输特性：① 拐弯巷道中无线传输频率越低，衰减越小，其中350 MHz～900 MHz频段的无线传输衰减最小。② 分支巷道中无线传输频率越低，衰减越小，其中350 MHz～900 MHz频段的无线传输衰减最小。③ 辅助运输大巷中700 MHz～900 MHz频段的无线传输衰减最小。④ 掘进巷道中700 MHz～900 MHz频段的无线传输衰减最小。⑤ 综采工作面中433 MHz～1300 MHz频段的无线传输衰减最小。⑥ 在巷道断面相同的情况下，拐弯巷道中的无线传输衰减小于分支巷道，支巷发射的分支巷道中的无线传输衰减小于主巷发射的分支巷道。巷道拐弯和分支均增加了无线传输衰减。提出了煤矿井下无线通信系统的优选工作频段与天线在拐弯和分支巷道中的最佳布置方式：① 煤矿井下无线通信系统的工作频段应优选700 MHz～900 MHz。② 为减小巷道拐弯和分支对无线传输的影响，无线通信基站和定位分站及其天线应设置在拐弯巷道的拐点和分支巷道的分支点。研究成果已被中华人民共和国能源行业标准NB/T 11546—2024《煤矿用5G通信系统通用技术条件》、NB/T 11523—2024《煤矿用5G通信基站》和NB/T 11547—2024《煤矿用5G通信基站控制器》应用。
- 矿井无线传输 /
- 无线工作频段 /
- 5G /
- 基站布置 /
- 天线设置
Abstract: The development and deployment of mobile communication systems, personnel and vehicle positioning systems in mines require an analysis of wireless transmission characteristics, the selection of preferred working frequency bands, and the optimization of wireless communication base stations and positioning substations. In this study, wireless transmission tests were conducted in a large frequency range from 350 MHz to 6 GHz in mine environments such as curved tunnels, branch tunnels, main transportation tunnels, excavation tunnels, and fully mechanized mining faces. The test results were analyzed, revealing the characteristics of wireless transmission in mines: ① In curved tunnels, the lower the wireless transmission frequency, the smaller the attenuation, with the least attenuation in the 350 MHz to 900 MHz frequency band. ② In branch tunnels, the lower the frequency, the smaller the attenuation, with the least attenuation in the 350 MHz to 900 MHz frequency band. ③ In main transportation tunnels, the least wireless transmission attenuation was found in the 700 MHz to 900 MHz frequency band. ④ In excavation tunnels, the least attenuation was in the 700 MHz to 900 MHz frequency band. ⑤ In fully mechanized mining faces, the least attenuation was observed in the 433 MHz to 1 300 MHz frequency band. ⑥ With the same cross-sectional area of the tunnels, wireless transmission attenuation in curved tunnels was smaller than in branch tunnels, and the attenuation in branch tunnels emitted from branch sources was smaller than that emitted from main tunnels. Curves and branches in tunnels increased wireless transmission attenuation. Furthermore, this paper proposed the preferred working frequency bands and the best arrangement of antennas for wireless communication systems in underground coal mines, specifically in curved and branch tunnels: ① The working frequency bands for underground wireless communication systems should preferably be in the 700 MHz to 900 MHz range. ② To minimize the impact of curves and branches in tunnels on wireless transmission, wireless communication base stations, positioning substations, and their antennas should be set at the turning points of curved tunnels and at the branch points of branch tunnels. The research results have been applied to the People's Republic of China energy industry standards NB/T 11546-2024 General specification of 5G communication system for coal mines, NB/T 11523-2024 5G communication base station for coal mines, and NB/T 11547-2024 5G communication baseband controller for coal mines.
- mine wireless transmission /
- wireless working frequency bands /
- 5G /
- base station arrangement /
- antenna setup

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0. 引言

5G，5.5G，WiFi6，WiFi7，UWB，ZigBee等矿井移动通信系统、人员和车辆定位系统等的研发和布置，需进行矿井无线传输特性分析，优选无线工作频段，优化无线通信基站和定位分站布置，在保证通信效果的前提下，减少无线通信基站和定位分站数量，降低系统成本和维护工作量^[1-4]。国家标准GB/T 3836.1—2021《爆炸性环境第1部分：设备通用要求》^[5]无线电波发射功率不得大于6 W的限制，制约了矿井无线传输距离，增加了无线通信基站和定位分站的用量，增大了系统建设成本和维护工作量^[6-11]。在无线电波发射功率受限、接收灵敏度一定的情况下，选择衰减较小的无线传输频段，可有效提高单个无线通信基站和定位分站的无线信号覆盖范围，减小无线通信基站和定位分站的用量，降低系统建设成本和维护工作量^[12-13]。目前通过理论分析和电磁仿真研究矿井无线传输衰减的较多，但误差较大；矿井现场测试分析的较少，难以满足优化无线工作频段及无线通信基站和定位分站布置的需求^[14-16]。因此，笔者进行了350 MHz～6 GHz较大频率范围的煤矿井下无线传输测试，并对测试结果进行了分析研究，揭示了矿井无线传输特性，提出了煤矿井下无线通信系统（以下简称矿用无线通信系统）的优选工作频段。

1. 矿井测试环境与测试方法

1.1 测试环境

笔者于2023年6月在国家能源集团宁夏煤业有限责任公司羊场湾煤矿进行了350 MHz～6 GHz频段的无线传输测试，测试地点情况如下：① 宽度为5.5 m、高度为4.1 m的半圆拱形+矩形断面（以下简称半圆拱形断面）拐弯巷道，拐弯巷道的拐角为66°，测试长度为40 m，如图1（a）和图1（b）所示。② 宽度为5.5 m、高度为4.1 m的半圆拱形断面分支巷道，分支巷道为直角T字型，测试长度为40 m，如图1（a）和图1（c）所示。③ 宽度为5.6 m、高度为4.6 m的半圆拱形断面辅助运输大巷（以下简称辅运大巷1），平直段测试长度为410 m，如图1（d）所示。④ 宽度为3.8 m、高度为3.6 m的半圆拱形断面辅助运输大巷（以下简称辅运大巷2），平直段测试长度为200 m，如图1（e）所示。⑤ 宽度为5.4 m、高度为3.4 m的梯形断面掘进巷道，掘进巷道一侧安装有宽2 m的带式输送机，平直段测试长度为500 m，如图1（f）所示。⑥ 下底宽度为3.4 m、上底宽度为3.1 m、高度为1.7 m的梯形断面综采工作面，综采工作面平均坡度为10°，测试长度为98 m，如图1（g）所示。

图 1 测试地点

Figure 1. Test sites

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1.2 测试设备及测试方法

测试设备：1台便携式射频信号发生器BPSG6，其发射频段为23.5 MHz～6 GHz，最大发射功率为+18 dBm；1台便携式实时频谱分析仪V6−RSA250X，其测量频段为10 MHz～6 GHz，最大实时带宽为80 MHz，显示平均噪声电平为−170 dBm/Hz；2根对数周期天线TN306，其工作频段为350 MHz～8 GHz，典型增益为6 dBi；1根长0.3 m的SMA射频馈线、1根长1 m的SMA射频馈线、2个高2.06 m的可伸缩三角支架和2台笔记本电脑。

根据矿用5G，5.5G，WiFi6，WiFi7，UWB，ZigBee等矿井人员定位系统^[17]、移动通信系统^[18-21]、无线视频和无线传感器使用频段，无线传输测试频点选择350，433，550，700，800，900，1 300，1 700，1 900，2 100，2 400，2 600，3 300，3 500，4 200，4 900，5 400，6 000 MHz。

矿井拐弯巷道、分支巷道、辅助运输大巷、掘进巷道、综采工作面的测试设备布置如图2所示。在无线发射端，将固定在可伸缩三脚架上的便携式射频信号发生器通过射频馈线与对数周期天线相连，并通过数据线与笔记本电脑连接，使用笔记本电脑上预装的Aaronia AG−HF Generator软件设置射频信号的频率和功率。在无线接收端，将便携式实时频谱分析仪通过射频馈线与对数周期天线连接，并通过数据线与笔记本电脑连接，使用笔记本电脑上预装的Aaronia RTSA−Suite PRO软件实时记录无线传输接收功率测试值。发射设备及发射天线固定不动，设定频率和发射功率为某一定值，沿巷道轴向移动接收设备及接收天线，并在每个测试点处测试100个数据取平均值，即为该测试点无线传输接收功率。

图 2 测试设备布置

Figure 2. Test equipment layout

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2. 拐弯巷道无线传输测试分析及优选工作频段

发射设备及发射天线固定不动，收发天线均置于拐弯巷道断面中央，将便携式射频信号发生器的输出功率设置为+13 dBm。如图3所示，将发射天线置于巷道拐点前20 m处，并将接收天线分别置于拐点后4，8，12，16，20 m处（即收发天线分别相距24，28，32，36，40 m），测试不同频率和距离下无线传输接收功率，数据见表1，曲线如图4所示。

图 3 拐弯巷道无线收发天线布置

Figure 3. Layout of wireless transmitting and receiving antenna in a curved roadway

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表 1 拐弯巷道中不同频率和距离下无线传输接收功率数据

Table 1. Received power data of wireless transmission at different frequencies and distances in a curved roadway

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
24	−22.28	−22.82	−32.40	−35.15	−37.62	−42.91	−42.60	−41.86	−46.21	−51.59	−45.72	−46.04	−50.76	−51.58	−48.47	−50.90	−56.32	−56.32
28	−22.20	−25.12	−32.24	−45.18	−34.56	−42.98	−54.95	−50.55	−45.21	−58.01	−49.25	−59.45	−60.23	−61.59	−61.76	−64.29	−63.21	−60.06
32	−34.21	−40.98	−34.27	−38.93	−48.81	−47.36	−45.27	−59.60	−49.38	−62.11	−71.49	−55.17	−67.06	−60.63	−62.60	−75.08	−67.38	−74.03
36	−40.55	−48.27	−45.66	−48.81	−45.17	−48.50	−50.72	−62.06	−59.00	−65.62	−62.13	−73.12	−66.40	−75.20	−69.70	−71.04	−69.24	−70.19
40	−37.84	−32.15	−35.25	−61.54	−46.72	−49.25	−55.87	−65.36	−56.72	−65.15	−68.50	−67.28	−67.04	−71.11	−64.93	−69.70	−76.87	−72.05

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图 4 拐弯巷道中不同频率和距离下无线传输接收功率曲线

Figure 4. Received power curve of wireless transmission at different frequencies and distances in a curved roadway

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为了便于分析，将拐弯巷道中拐点后20 m内的无线传输接收功率数据按不同频率取平均值，得到拐弯巷道中不同频率下无线传输平均接收功率，见表2。

表 2 拐弯巷道中不同频率下无线传输平均接收功率

Table 2. Average received power of wireless transmissions at different frequencies in a curved roadway

频率/MHz	无线传输平均接收功率/dBm	频率/MHz	无线传输平均接收功率/dBm
350	−31.42	2 100	−60.50
433	−33.87	2 400	−59.42
550	−35.96	2 600	−60.21
700	−45.92	3 300	−62.30
800	−42.58	3 500	−64.02
900	−46.20	4 200	−61.49
1 300	−49.88	4 900	−66.20
1 700	−55.89	5 400	−66.60
1 900	−51.30	6 000	−66.53

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由表1、表2和图4可知，从整体趋势来看，在350 MHz～6 GHz频段，无线传输频率越高，拐弯巷道的平均接收功率越低，即频率越低，拐弯巷道的无线传输衰减越小。拐弯巷道在350 MHz～900 MHz频段的无线传输平均接收功率最大，拐弯巷道中的无线传输平均接收功率最大值为−31.42 dBm（对应频率为350 MHz），在350 MHz～900 MHz频段的无线传输平均接收功率为−39.33 dBm。因此，在350 MHz～6 GHz频段，拐弯巷道中矿用无线通信系统的无线工作频段应优选350 MHz～900 MHz。

3. 分支巷道无线传输测试分析及优选工作频段

发射设备及发射天线固定不动，收发天线均置于分支巷道断面中央，将便携式射频信号发生器的输出功率设置为+13 dBm。分支巷道的无线传输测试分为支巷发射和主巷发射2种测试。① 支巷发射测试：将发射天线置于距分支点20 m的支巷道中，如图5（a）所示，接收天线分别置于距分支点4，8，12，16，20 m的主巷道中（即收发天线分别相距24，28，32，36，40 m），测试不同频率和距离下无线传输接收功率，数据见表3，曲线如图6所示。② 主巷发射测试：将发射天线置于距分支点20 m的主巷道中，如图5（b）所示，接收天线分别置于距分支点4，8，12，16，20 m的支巷道中（即收发天线分别相距24，28，32，36，40 m），测试不同频率和距离下无线传输接收功率，数据见表4，曲线如图7所示。

图 5 分支巷道无线收发天线布置

Figure 5. Layout of wireless transmitting and receiving antenna in a branch roadway

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表 3 支巷发射时分支巷道不同频率和距离下无线传输接收功率数据

Table 3. Received power data of wireless transmission at different frequencies and distances in a branch roadway with transmitting equipment in a split roadway

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
24	−35.99	−24.06	−32.52	−38.29	−37.34	−41.62	−56.66	−35.73	−41.53	−56.73	−49.38	−47.26	−50.90	−47.12	−46.31	−48.80	−61.25	−56.25
28	−32.29	−27.52	−30.38	−49.04	−44.61	−43.36	−45.69	−53.94	−53.64	−47.57	−56.76	−47.23	−67.48	−52.89	−58.82	−56.88	−62.55	−69.30
32	−33.11	−31.06	−43.47	−50.32	−48.58	−45.68	−50.07	−58.09	−59.59	−59.33	−67.01	−57.71	−67.10	−64.37	−67.49	−65.69	−65.94	−66.59
36	−36.68	−38.25	−43.78	−47.44	−43.86	−49.38	−53.87	−58.77	−54.76	−61.33	−71.02	−61.45	−68.94	−65.70	−72.55	−70.06	−68.10	−74.35
40	−39.07	−38.04	−48.29	−50.03	−53.87	−58.54	−58.87	−66.02	−64.92	−67.78	−75.75	−65.23	−78.82	−72.98	−70.17	−88.03	−70.94	−74.19

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图 6 支巷发射时分支巷道不同频率和距离下无线传输接收功率曲线

Figure 6. Received power curve of wireless transmission at different frequencies and distances in a branch roadway with transmitting equipment in a split roadway

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为便于分析，将分支巷道中分支点后20 m内的无线传输接收功率数据按不同频率取平均值，分别得到支巷发射和主巷发射时分支巷道不同频率下无线传输平均接收功率，见表5。

由表3、表5和图6可知，从整体趋势来看，在350 MHz～6 GHz频段内，在支巷发射的分支巷道中，无线传输频率越高，平均接收功率越低，即频率越低，无线传输衰减越小。支巷发射时分支巷道在350 MHz～900 MHz频段的无线传输平均接收功率最大，支巷发射时分支巷道中的无线传输平均接收功率最大值为−31.79 dBm（对应频率为433 MHz），在350 MHz～900 MHz频段的无线传输平均接收功率为−41.22 dBm。因此，在350 MHz～6 GHz频段内，支巷发射的分支巷道中矿用无线通信系统的工作频段应优选350 MHz～900 MHz。

表 4 主巷发射时分支巷道不同频率和距离下无线传输接收功率数据

Table 4. Received power data of wireless transmission at different frequencies and distances in a branch roadway with transmitting equipment in a main roadway

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
24	−32.45	−29.13	−37.34	−51.59	−46.13	−43.63	−34.52	−56.16	−45.59	−45.07	−58.16	−60.65	−54.62	−54.58	−49.42	−57.12	−54.99	−53.00
28	−41.37	−37.00	−42.61	−47.94	−57.57	−45.77	−51.76	−56.48	−56.06	−63.36	−61.58	−64.74	−61.74	−57.40	−60.39	−76.91	−59.36	−63.17
32	−32.71	−36.42	−40.75	−52.02	−57.59	−52.03	−50.94	−48.91	−49.96	−54.91	−65.85	−68.14	−71.12	−62.02	−60.43	−71.24	−73.88	−63.52
36	−44.05	−33.22	−60.76	−46.13	−49.06	−46.04	−55.97	−67.89	−55.64	−76.82	−64.63	−66.53	−69.98	−67.52	−69.34	−70.69	−82.48	−73.71
40	−43.41	−42.05	−57.47	−60.01	−62.31	−63.70	−63.66	−60.56	−65.00	−65.90	−63.97	−69.90	−70.66	−75.86	−70.16	−75.49	−78.04	−77.17

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图 7 主巷发射时分支巷道不同频率和距离下无线传输接收功率曲线

Figure 7. Received power curve of wireless transmission at different frequencies and distances in a branch roadway with transmitting equipment in a main roadway

下载: 全尺寸图片幻灯片

表 5 分支巷道不同频率下无线传输平均接收功率

Table 5. Average received power of wireless transmissions at different frequencies in a branch roadway

频率/ MHz	支巷发射时分支巷道中无线传输平均接收功率/dBm	主巷发射时分支巷道中无线传输平均接收功率/dBm	频率/ MHz	支巷发射时分支巷道中无线传输平均接收功率/dBm	主巷发射时分支巷道中无线传输平均接收功率/dBm
350	−35.43	−38.80	2100	−58.55	−61.21
433	−31.79	−35.56	2400	−63.98	−62.84
550	−39.69	−47.79	2600	−55.78	−65.99
700	−47.02	−51.54	3300	−66.65	−65.62
800	−45.65	−54.53	3500	−60.61	−63.48
900	−47.72	−50.23	4200	−63.07	−61.95
1300	−53.03	−51.37	4900	−65.89	−70.29
1700	−54.51	−58.00	5400	−65.76	−69.75
1900	−54.89	−54.45	6000	−68.14	−66.11

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由表4、表5和图7可知，从整体趋势来看，在350 MHz～6 GHz频段内，在主巷发射的分支巷道中，无线传输频率越高，平均接收功率越低，即频率越低，无线传输衰减越小。主巷发射时分支巷道在350 MHz～1 900 MHz频段的无线传输平均接收功率最大，主巷发射时分支巷道中的无线传输平均接收功率最大值为−35.56 dBm（对应频率为433 MHz），在350 MHz～1 900 MHz频段的无线传输平均接收功率为−49.14 dBm。因此，在350 MHz～6 GHz频段内，主巷发射的分支巷道中矿用无线通信系统的工作频段应优选350 MHz～1 900 MHz。

综合考虑主巷发射和支巷发射时分支巷道中的无线传输衰减，分支巷道中矿用无线通信系统的工作频段应优选350 MHz～900 MHz。

4. 拐弯和分支巷道无线传输比较分析

发射设备及发射天线固定不动，收发天线均置于与拐弯、分支巷道断面相同的平直巷道断面中央，设置便携式射频信号发生器的输出功率为+13 dBm。将接收天线分别置于距离发射天线24，28，32，36，40 m处，测试得到平直巷道中不同频率和距离下无线传输接收功率，并将平直巷道中的无线传输接收功率数据按不同频率取平均值，得到平直巷道中不同频率和距离下无线传输平均接收功率，见表6。

为便于比较分析，分别将相同断面和长度的拐弯巷道、分支巷道和平直巷道中的无线传输接收功率数据取平均值，得到拐弯巷道、分支巷道和平直巷道中不同频率下无线传输平均接收功率，如图8所示。在350 MHz～6 GHz频段，平直巷道中的无线传输平均接收功率为−39.93 dBm，拐弯巷道中的无线传输平均接收功率为−53.35 dBm，支巷发射的分支巷道中的无线传输平均接收功率为−54.34 dBm，主巷发射的分支巷道中的无线传输平均接收功率为−57.20 dBm，无线传输平均接收功率依次减小，无线传输衰减依次增大。即在巷道断面相同的情况下，平直巷道中的无线传输衰减小于拐弯巷道和分支巷道；拐弯巷道中的无线传输衰减小于分支巷道；支巷发射的分支巷道中的无线传输衰减小于主巷发射的分支巷道。巷道拐弯和分支均增加了无线传输衰减。因此，无线通信基站和定位分站及其天线应设置在拐弯巷道的拐点和分支巷道的分支点，以减小巷道拐弯和分支对无线传输的影响。

表 6 平直巷道中不同频率和距离下无线传输接收功率

Table 6. Received power of wireless transmission at different frequencies and distances in a straight roadway

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
24	−18.34	−20.49	−20.47	−27.64	−33.14	−33.21	−37.67	−41.62	−33.66	−37.94	−56.94	−38.67	−48.72	−39.26	−72.71	−49.75	−54.59	−45.46
28	−22.52	−15.93	−25.41	−23.17	−30.45	−39.83	−36.07	−44.59	−37.21	−40.25	−41.45	−38.22	−46.69	−55.20	−43.07	−45.60	−49.32	−47.99
32	−21.36	−21.09	−23.64	−27.71	−25.27	−33.57	−45.50	−41.68	−41.28	−63.74	−53.05	−38.81	−63.47	−46.80	−54.36	−46.00	−56.70	−53.44
36	−18.23	−24.37	−26.31	−28.55	−30.34	−35.08	−39.46	−43.34	−39.82	−40.71	−47.55	−43.74	−44.07	−48.51	−43.67	−49.65	−51.22	−49.94
40	−21.80	−19.99	−27.85	−27.22	−28.29	−31.91	−48.94	−40.60	−34.16	−45.92	−46.68	−50.03	−49.29	−42.23	−50.14	−77.09	−52.49	−44.22
平均接收功率/dBm	−20.45	−20.37	−24.74	−26.86	−29.50	−34.72	−41.53	−42.37	−37.23	−45.71	−49.13	−41.89	−50.45	−46.40	−52.79	−53.62	−52.86	−48.21

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图 8 拐弯巷道、分支巷道和平直巷道中不同频率下无线传输平均接收功率曲线

Figure 8. Average received power curve of wireless transmission at different frequencies in a curved, branch and straight roadways

下载: 全尺寸图片幻灯片

5. 辅运大巷1无线传输测试分析及优选工作频段

发射设备及发射天线固定不动，收发天线均置于辅运大巷1断面中央，设置便携式射频信号发生器的输出功率为+13 dBm。将接收天线分别置于距离发射天线1，3，5，10，30，50，70，90，110，130，150，170，190，210，230，250，270，290，310，330，350，370，390，410 m处，测试不同频率和距离下无线传输接收功率，数据见表7，曲线如图9所示。

表 7 辅运大巷1中不同频率和距离下无线传输接收功率数据

Table 7. Received power data of radio transmission at different frequencies and distances in auxiliary transport roadway 1

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
1	−14.58	−18.33	−18.66	−19.33	−39.92	−42.72	−21.18	−21.04	−20.27	−19.78	−20.62	−19.03	−22.82	−22.07	−22.74	−23.42	−26.96	−22.42
3	−11.25	−18.50	−23.41	−16.63	−14.48	−18.55	−25.61	−25.21	−23.01	−30.11	−25.61	−26.76	−28.25	−31.66	−30.89	−31.24	−34.18	−30.07
5	−13.70	−14.60	−21.19	−19.29	−25.63	−17.87	−28.85	−30.59	−26.69	−30.16	−28.18	−28.90	−37.04	−32.77	−32.91	−39.24	−41.72	−33.14
10	−21.20	−17.46	−20.77	−30.70	−22.75	−33.45	−26.89	−41.36	−30.35	−42.20	−53.86	−43.84	−36.18	−44.89	−47.46	−37.30	−51.37	−46.68
30	−41.03	−16.16	−21.92	−38.79	−31.29	−35.85	−36.44	−35.82	−36.37	−41.71	−44.27	−40.24	−43.50	−46.59	−51.08	−52.64	−46.49	−45.64
50	−31.20	−19.92	−35.25	−28.75	−32.30	−35.56	−45.02	−45.77	−43.11	−36.09	−50.82	−46.44	−56.57	−48.92	−46.98	−48.15	−60.87	−61.45
70	−30.14	−25.71	−28.91	−38.29	−36.62	−36.01	−45.10	−43.09	−50.50	−44.81	−50.74	−50.15	−49.44	−46.45	−53.23	−52.10	−50.12	−44.82
90	−37.50	−29.78	−34.36	−34.48	−37.30	−39.91	−42.57	−48.70	−47.24	−53.42	−54.93	−55.67	−53.29	−58.60	−46.88	−48.23	−61.16	−56.65
110	−44.20	−36.51	−40.81	−38.16	−39.68	−41.29	−40.80	−52.56	−46.25	−54.16	−58.60	−54.27	−51.43	−52.54	−50.38	−54.39	−60.18	−57.51
130	−48.33	−36.12	−39.70	−38.09	−40.49	−46.83	−45.49	−42.61	−52.57	−53.51	−54.05	−51.72	−58.54	−51.77	−59.83	−54.92	−61.72	−60.07
150	−53.51	−41.79	−43.44	−39.23	−38.78	−41.23	−47.21	−46.86	−51.09	−49.73	−54.06	−52.46	−72.57	−55.06	−63.98	−61.40	−67.39	−56.96
170	−58.66	−46.34	−43.02	−39.67	−41.44	−43.96	−45.61	−46.00	−45.34	−48.36	−52.39	−52.67	−65.97	−57.56	−61.50	−63.96	−65.06	−64.44
190	−60.40	−47.56	−45.00	−43.56	−42.47	−42.76	−50.27	−53.34	−48.85	−52.78	−55.35	−52.78	−64.40	−55.91	−68.19	−61.13	−58.29	−58.05
210	−64.17	−47.13	−47.22	−41.22	−50.13	−44.07	−48.15	−50.28	−50.75	−50.23	−51.44	−50.42	−55.78	−58.97	−65.31	−59.76	−64.02	−63.56
230	−66.72	−50.17	−46.80	−42.36	−41.30	−42.67	−46.00	−52.38	−50.18	−58.53	−52.88	−49.58	−57.95	−53.81	−66.03	−60.59	−68.02	−69.48
250	−70.91	−53.76	−49.18	−41.91	−43.76	−44.48	−45.13	−49.76	−48.26	−55.34	−61.82	−55.46	−59.62	−51.25	−64.03	−69.25	−72.77	−58.58
270	−75.07	−56.71	−50.31	−44.35	−41.89	−43.36	−47.85	−48.45	−48.10	−51.90	−59.29	−55.46	−61.17	−65.78	−57.22	−60.92	−61.29	−61.47
290	−77.84	−57.31	−54.54	−44.49	−46.12	−46.92	−50.54	−49.68	−48.02	−49.79	−54.73	−54.19	−56.81	−62.94	−59.96	−57.40	−62.10	−62.82
310	−81.64	−61.52	−52.73	−46.22	−43.93	−44.68	−49.30	−50.12	−51.23	−53.82	−52.26	−50.43	−55.49	−59.30	−55.97	−61.10	−61.19	−61.80
330	−82.00	−62.32	−58.79	−48.88	−46.52	−47.79	−48.64	−51.14	−50.25	−57.70	−55.87	−54.59	−58.07	−55.11	−57.48	−57.53	−62.35	−66.88
350	−82.93	−65.78	−56.82	−48.70	−47.81	−48.78	−49.57	−52.05	−50.03	−55.91	−61.41	−55.79	−62.26	−58.83	−55.76	−57.60	−67.10	−64.69
370	−84.90	−70.64	−62.62	−49.15	−48.90	−50.20	−49.31	−54.30	−53.62	−55.54	−70.89	−62.80	−56.92	−57.09	−53.74	−56.79	−60.03	−63.74
390	−84.97	−71.01	−61.15	−50.16	−49.05	−48.94	−52.25	−54.11	−51.56	−56.53	−62.73	−63.44	−57.85	−55.90	−54.20	−56.42	−61.75	−66.43
410	−85.36	−71.44	−67.62	−59.75	−49.60	−51.17	−50.56	−52.76	−56.44	−60.01	−63.76	−68.23	−66.33	−55.17	−55.06	−57.03	−57.53	−57.48

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图 9 辅运大巷1中不同频率和距离下无线传输接收功率曲线

Figure 9. Received power curve of wireless transmission at different frequencies and distances in auxiliary transport roadway 1

下载: 全尺寸图片幻灯片

为便于分析，将辅运大巷1中距发射天线前410 m的无线传输接收功率数据按不同频率取平均值，得到辅运大巷1中不同频率下无线传输平均接收功率，见表8。

表 8 辅运大巷1中不同频率下无线传输平均接收功率

Table 8. Average received power of radio transmissions at different frequencies in auxiliary transport roadway 1

频率/MHz	无线传输平均接收功率/dBm	频率/MHz	无线传输平均接收功率/dBm
350	−55.09	2100	−48.42
433	−43.19	2400	−52.11
550	−42.68	2600	−49.81
700	−39.26	3300	−53.68
800	−39.67	3500	−51.62
900	−41.21	4200	−53.37
1300	−43.26	4900	−53.44
1700	−45.75	5400	−57.65
1900	−45.00	6000	−55.62

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由表7、表8和图9可知，在350 MHz～6 GHz频段内，辅运大巷1中700 MHz～900 MHz频段的无线传输平均接收功率最大，辅运大巷1中的无线传输平均接收功率最大值为−39.26 dBm（对应频率为700 MHz），在700 MHz～900 MHz频段的无线传输平均接收功率为−40.05 dBm。因此，在辅运大巷1中矿用无线通信系统的工作频段应优选700 MHz～900 MHz。

6. 辅运大巷2无线传输测试分析及优选工作频段

发射设备及发射天线固定不动，收发天线均置于辅运大巷2断面中央，设置便携式射频信号发生器的输出功率为+13 dBm。将接收天线分别置于距离发射天线1，3，5，10，20，30，40，50，70，80，90，100，110，120，130，140，150，160，170，180，190，200 m处，测试不同频率和距离下无线传输接收功率，数据见表9，曲线如图10所示。

表 9 辅运大巷2中不同频率和距离下无线传输接收功率数据

Table 9. Received power data of wireless transmission at different frequencies and distances in auxiliary transport roadway 2

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
1	−14.38	−18.35	−23.20	−23.73	−21.78	−24.44	−25.16	−24.83	−24.45	−22.17	−22.13	−20.63	−22.60	−21.31	−21.64	−22.66	−26.43	−21.81
3	−11.11	−21.49	−23.23	−23.90	−21.63	−23.88	−21.94	−24.96	−25.20	−29.90	−26.70	−29.34	−33.84	−30.47	−31.13	−31.31	−37.58	−31.82
5	−11.22	−18.35	−23.39	−20.74	−20.80	−23.96	−41.17	−29.19	−31.19	−29.69	−34.68	−29.07	−31.76	−39.34	−35.42	−35.08	−38.69	−34.55
10	−18.12	−16.47	−20.72	−22.07	−20.16	−22.18	−27.53	−32.27	−31.45	−38.31	−44.81	−36.38	−38.13	−47.16	−36.26	−42.83	−42.17	−44.55
20	−22.15	−24.71	−21.04	−27.47	−28.57	−40.05	−36.16	−34.17	−34.15	−35.27	−39.04	−39.93	−48.68	−42.57	−43.14	−50.97	−43.55	−50.97
30	−27.06	−26.10	−26.10	−25.16	−25.66	−29.47	−54.14	−43.19	−45.00	−38.90	−43.05	−34.05	−49.52	−49.84	−44.98	−42.61	−50.41	−48.54
40	−36.21	−37.00	−33.27	−29.72	−28.97	−32.30	−43.30	−40.03	−35.83	−47.12	−49.74	−47.27	−47.29	−65.30	−62.23	−56.13	−48.12	−46.95
50	−37.05	−53.62	−38.99	−33.22	−38.59	−35.34	−40.25	−34.80	−36.98	−47.42	−43.84	−45.69	−49.05	−44.21	−45.81	−50.53	−56.92	−61.68
70	−48.41	−48.21	−46.65	−37.76	−46.57	−44.66	−37.46	−50.99	−42.66	−48.39	−44.43	−45.75	−58.21	−51.74	−51.65	−53.56	−56.35	−54.70
80	−53.85	−51.44	−48.96	−43.14	−37.09	−44.71	−37.22	−41.94	−42.41	−43.81	−55.21	−42.03	−51.67	−50.92	−55.86	−56.22	−66.26	−60.74
90	−67.00	−62.22	−45.80	−41.90	−42.76	−39.75	−44.05	−45.36	−41.85	−46.43	−56.86	−47.52	−74.74	−54.73	−71.95	−58.34	−58.18	−50.20
100	−71.48	−62.66	−55.62	−42.91	−48.20	−43.37	−41.32	−40.35	−42.98	−49.55	−49.87	−52.20	−52.44	−46.05	−52.75	−59.49	−59.44	−58.91
110	−71.39	−63.25	−59.02	−55.99	−43.49	−48.24	−39.95	−44.29	−41.70	−52.04	−49.57	−46.88	−51.80	−52.33	−49.06	−53.56	−59.86	−63.01
120	−82.03	−66.47	−57.63	−56.39	−44.51	−43.85	−42.42	−41.39	−44.50	−45.01	−48.94	−47.88	−52.04	−52.47	−51.85	−53.15	−66.64	−54.70
130	−78.15	−72.70	−61.52	−59.38	−47.16	−48.48	−53.92	−43.12	−42.96	−46.58	−50.32	−47.03	−53.64	−51.43	−54.14	−59.49	−63.29	−56.01
140	−83.74	−77.96	−65.27	−57.40	−55.81	−47.86	−48.15	−44.04	−44.55	−45.86	−51.88	−48.01	−55.59	−54.75	−58.06	−57.81	−60.25	−57.75
150	−83.90	−74.07	−65.87	−55.04	−51.16	−47.62	−48.77	−46.36	−47.51	−46.60	−49.06	−47.08	−54.04	−51.64	−58.24	−56.12	−57.13	−64.00
160	−83.36	−80.56	−67.56	−59.54	−49.49	−48.12	−49.15	−46.76	−45.28	−51.55	−48.28	−45.72	−53.18	−49.80	−55.58	−61.83	−58.66	−57.28
170	−84.43	−86.00	−69.57	−66.17	−51.34	−49.14	−48.60	−45.12	−44.94	−49.32	−50.37	−49.11	−52.40	−51.55	−55.19	−59.66	−63.65	−58.34
180	−88.55	−83.52	−73.59	−71.27	−51.89	−51.40	−47.34	−48.47	−45.82	−50.02	−51.25	−49.07	−53.88	−52.05	−63.03	−56.64	−63.13	−56.88
190	−86.83	−87.55	−78.42	−65.44	−56.53	−53.43	−45.78	−49.29	−47.26	−50.41	−48.66	−47.98	−54.43	−51.68	−55.56	−58.83	−65.83	−58.14
200	−82.54	−85.92	−74.96	−64.43	−61.27	−54.55	−48.60	−50.56	−50.12	−54.76	−51.76	−48.34	−55.19	−52.24	−54.51	−58.61	−64.82	−66.09

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图 10 辅运大巷2中不同频率和距离下无线传输接收功率曲线

Figure 10. Received power curve of wireless transmission at different frequencies and distances in auxiliary transport roadway 2

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为了便于分析，将辅运大巷2中距发射天线前200 m的无线传输接收功率数据按不同频率取平均值，得到辅运大巷2中不同频率下无线传输平均接收功率，见表10。

表 10 辅运大巷2中不同频率下无线传输平均接收功率

Table 10. Average received power of wireless transmissions at different frequencies in auxiliary transport roadway 2

频率/MHz	无线传输平均接收功率/dBm	频率/MHz	无线传输平均接收功率/dBm
350	−56.50	2100	−44.05
433	−55.39	2400	−45.93
550	−49.11	2600	−43.04
700	−44.67	3300	−49.73
800	−40.61	3500	−48.34
900	−40.76	4200	−50.37
1300	−41.93	4900	−51.61
1700	−40.98	5400	−54.88
1900	−40.40	6000	−52.62

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由表9、表10和图10可知，在350 MHz～6 GHz频段内，辅运大巷2中800 MHz～1900 MHz频段的无线传输平均接收功率最大，700 MHz～2600 MHz频段的无线传输平均接收功率较大；辅运大巷2中的无线传输平均接收功率最大值为−40.40 dBm（对应频率为1900 MHz）；在800 MHz～1 900 MHz频段的无线传输平均接收功率为−40.94 dBm，在700 MHz～2 600 MHz频段的无线传输平均接收功率为−42.49 dBm。因此，在辅运大巷2中矿用无线通信系统的工作频段应优选800 MHz～1 900 MHz或700 MHz～2 600 MHz。

综合考虑辅运大巷1、辅运大巷2、巷道拐弯和分支的无线传输衰减，辅助运输大巷中矿用无线通信系统的工作频段应优选700 MHz～900 MHz。

7. 掘进巷道无线传输测试分析及优选工作频段

发射设备及发射天线固定不动，收发天线均置于掘进巷道断面中央，设置便携式射频信号发生器的输出功率为+13 dBm。将接收天线分别置于距离发射天线1，3，5，10，20，40，60，80，100，120，140，160，180，200，250，300，350，400，450，500 m处，测试不同频率和距离下无线传输接收功率，数据见表11，曲线如图11所示。

表 11 掘进巷道中不同频率和距离下无线传输接收功率数据

Table 11. Received power data of wireless transmission at different frequencies and distances in an excavation roadway

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
1	−14.32	−13.64	−29.77	−23.69	−17.12	−24.24	−25.01	−25.04	−24.35	−25.56	−21.40	−23.48	−19.54	−19.69	−17.91	−18.05	−22.80	−21.13
3	−13.31	−15.30	−23.42	−23.89	−20.65	−24.63	−22.59	−23.41	−22.02	−23.84	−35.26	−28.72	−34.79	−30.16	−29.14	−31.23	−36.22	−32.53
5	−14.78	−18.64	−21.32	−24.17	−18.80	−28.86	−22.77	−31.07	−25.65	−31.80	−32.94	−28.89	−33.42	−32.05	−34.10	−35.49	−38.69	−34.50
10	−14.77	−17.52	−25.22	−21.16	−20.72	−26.98	−27.91	−46.25	−26.93	−30.94	−36.96	−33.42	−37.86	−38.99	−34.88	−39.32	−40.09	−39.71
20	−18.21	−19.64	−26.50	−21.22	−43.48	−28.84	−37.83	−36.00	−41.75	−41.30	−43.33	−36.66	−40.50	−46.12	−54.53	−44.77	−58.73	−45.85
40	−31.98	−20.34	−31.83	−32.84	−48.24	−38.62	−37.69	−35.95	−49.67	−50.60	−49.04	−44.78	−46.20	−43.15	−47.94	−52.26	−60.17	−56.06
60	−37.87	−30.51	−36.67	−28.73	−28.56	−38.05	−44.76	−32.88	−40.29	−43.00	−41.42	−42.11	−61.25	−63.79	−60.30	−48.24	−50.70	−61.30
80	−55.84	−41.48	−42.97	−32.94	−37.83	−36.35	−52.79	−40.49	−40.25	−44.74	−54.49	−48.90	−57.90	−49.97	−67.96	−56.11	−60.91	−53.08
100	−65.57	−46.48	−45.27	−39.32	−45.96	−42.74	−56.50	−48.13	−49.79	−46.71	−53.90	−46.36	−54.52	−53.27	−54.37	−67.14	−73.62	−57.64
120	−65.76	−53.59	−48.69	−41.56	−40.54	−39.10	−52.04	−51.09	−55.91	−59.91	−61.86	−50.61	−63.75	−60.35	−73.41	−57.30	−58.64	−54.86
140	−75.46	−53.26	−51.13	−39.21	−38.12	−43.48	−63.10	−67.30	−52.82	−57.01	−68.86	−58.60	−59.22	−49.77	−67.63	−70.56	−58.70	−55.41
160	−81.27	−56.43	−53.68	−42.65	−42.49	−47.51	−45.37	−53.65	−54.75	−53.17	−64.95	−62.07	−56.58	−51.39	−58.49	−60.48	−66.11	−59.10
180	−80.30	−65.60	−54.97	−47.23	−46.77	−44.64	−43.63	−43.86	−49.17	−53.22	−53.81	−53.83	−55.88	−65.31	−58.07	−58.71	−61.78	−63.71
200	−84.75	−74.78	−57.04	−45.96	−49.66	−49.90	−46.76	−58.65	−47.33	−59.30	−58.41	−56.42	−59.42	−59.86	−59.29	−60.80	−68.02	−64.48
250	−93.94	−83.46	−66.01	−52.53	−52.73	−58.50	−58.45	−58.71	−58.60	−60.79	−63.02	−59.11	−57.62	−59.28	−72.98	−69.16	−69.94	−63.78
300	−97.02	−95.52	−75.08	−57.01	−55.67	−57.49	−55.28	−57.72	−53.45	−58.45	−59.87	−53.58	−58.67	−62.76	−74.47	−66.66	−74.26	−71.03
350	−95.53	−100.33	−83.01	−64.47	−59.15	−60.35	−57.85	−57.29	−56.31	−55.93	−60.08	−66.81	−63.54	−59.53	−67.18	−72.27	−73.25	−71.68
400	−95.46	−100.98	−93.89	−69.26	−62.64	−63.31	−60.43	−61.53	−60.96	−66.34	−70.60	−71.80	−64.42	−65.07	−72.81	−74.50	−68.89	−75.44
450	−96.19	−99.01	−95.77	−76.39	−67.08	−66.13	−62.82	−61.24	−60.81	−71.64	−77.96	−64.77	−65.49	−64.66	−70.69	−73.70	−80.95	−84.38
500	−95.11	−101.17	−99.95	−83.76	−80.35	−78.76	−73.08	−64.32	−69.74	−78.78	−81.82	−81.40	−76.22	−76.48	−76.35	−85.81	−90.66	−86.32

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图 11 掘进巷道中不同频率和距离下无线传输接收功率曲线

Figure 11. Received power curve of wireless transmission at different frequencies and distances in an excavation roadway

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为便于分析，将掘进巷道中距发射天线前500 m的无线传输接收功率数据按不同频率取平均值，得到掘进巷道中不同频率下无线传输平均接收功率，见表12。

表 12 掘进巷道中不同频率下无线传输平均接收功率

Table 12. Average received power of wireless transmission at different frequencies in an excavation roadway

频率/MHz	无线传输平均接收功率/dBm	频率/MHz	无线传输平均接收功率/dBm
350	−61.37	2100	−50.65
433	−55.38	2400	−54.50
550	−53.11	2600	−50.62
700	−43.40	3300	−53.34
800	−43.83	3500	−52.58
900	−44.92	4200	−57.62
1300	−47.33	4900	−57.13
1700	−47.73	5400	−60.66
1900	−47.03	6000	−57.60

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由表11、表12和图11可知，在350 MHz～6 GHz频段，掘进巷道在700 MHz～900 MHz频段的无线传输平均接收功率最大，掘进巷道中的无线传输平均接收功率最大值为−43.40 dBm（对应频率为700 MHz），在700 MHz～900 MHz频段的无线传输平均接收功率为−44.05 dBm。因此，在掘进巷道中矿用无线通信系统的工作频段应优选700 MHz～900 MHz。

8. 综采工作面无线传输测试分析及优选工作频段

将收发天线置于距煤壁2.8 m、距液压支架立柱底部0.6 m、距综采工作面底部0.85 m的位置，将便携式射频信号发生器的输出功率设置为+13 dBm。接收天线分别置于距发射天线7.00，59.50，71.75，98.00 m处，测试不同频率和距离下无线传输接收功率，数据见表13，曲线如图12所示。

为便于分析，将综采工作面中距发射天线前98 m的无线传输接收功率数据按不同频率取平均值，得到综采工作面中不同频率下无线传输平均接收功率，见表14。

表 13 综采工作面中不同频率和距离下无线传输接收功率数据

Table 13. Received power data of wireless transmission at different frequencies and distances in fully mechanized mining face

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
7.00	−20.06	−22.84	−21.70	−22.88	−22.46	−21.56	−22.73	−26.05	−23.36	−26.55	−29.82	−23.37	−37.15	−30.41	−35.91	−38.40	−41.09	−39.90
59.50	−51.86	−47.86	−49.91	−49.00	−55.39	−54.67	−52.76	−63.12	−61.29	−53.55	−58.16	−71.53	−70.60	−49.87	−53.92	−57.74	−68.58	−56.91
71.75	−59.22	−54.54	−53.92	−51.17	−49.17	−52.92	−52.72	−65.82	−54.65	−56.78	−65.57	−65.34	−76.44	−65.57	−70.51	−64.95	−61.60	−59.20
98.00	−69.49	−73.47	−63.20	−67.66	−64.41	−68.03	−65.03	−65.25	−63.10	−68.94	−64.87	−62.20	−65.38	−63.63	−72.63	−78.02	−79.40	−67.00

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图 12 综采工作面中不同频率和距离下无线传输接收功率曲线

Figure 12. Received power curve of wireless transmission at different frequencies and distances in fully mechanized mining face

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表 14 综采工作面中不同频率下无线传输平均接收功率

Table 14. Average received power of wireless transmission at different frequencies in fully mechanized mining face

频率/MHz	无线传输平均接收功率/dBm	频率/MHz	无线传输平均接收功率/dBm
350	−50.16	2100	−51.46
433	−49.68	2400	−54.61
550	−47.18	2600	−55.61
700	−47.68	3300	−62.39
800	−47.86	3500	−52.37
900	−49.30	4200	−58.24
1300	−48.31	4900	−59.78
1700	−55.06	5400	−62.67
1900	−50.60	6000	−55.75

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由表13、表14和图12可知，在350 MHz～6 GHz频段内，综采工作面在433 MHz～1 300 MHz频段的无线传输平均接收功率最大，综采工作面中的无线传输平均接收功率最大值为−47.18 dBm（对应频率为550 MHz），在433 MHz～1 300 MHz频段的无线传输平均接收功率为−48.34 dBm。因此，在综采工作面中矿用无线通信系统的工作频段应优选433 MHz～1 300 MHz。

9. 结论

1）拐弯巷道中频率越低，无线传输衰减越小，其中350 MHz～900 MHz频段的无线传输衰减最小，矿用无线通信系统的工作频段应优选350 MHz～900 MHz。

2）分支巷道中频率越低，无线传输衰减越小，其中350 MHz～900 MHz频段的无线传输衰减最小，矿用无线通信系统的工作频段应优选350 MHz～900 MHz。

3）辅助运输大巷中700 MHz～900 MHz频段的无线传输衰减最小，矿用无线通信系统的工作频段应优选700 MHz～900 MHz。

4）掘进巷道中700 MHz～900 MHz频段的无线传输衰减最小，矿用无线通信系统的工作频段应优选700 MHz～900 MHz。

5）综采工作面中433 MHz～1 300 MHz频段的无线传输衰减最小，矿用无线通信系统的工作频段应优选433 MHz～1 300 MHz。

6）综合考虑拐弯巷道、分支巷道、辅助运输大巷、掘进工作面、综采工作面的无线传输衰减，矿用无线通信系统的工作频段应优选700 MHz～900 MHz。

7）在巷道断面相同的情况下，拐弯巷道中的无线传输衰减小于分支巷道；支巷发射的分支巷道中的无线传输衰减小于主巷发射的分支巷道。巷道拐弯和分支均增加了无线传输衰减。为减小巷道拐弯和分支对无线传输的影响，无线通信基站和定位分站及其天线应设置在拐弯巷道的拐点和分支巷道的分支点。

8）研究成果已被中华人民共和国能源行业标准NB/T 11546—2024《煤矿用5G通信系统通用技术条件》、NB/T 11523—2024《煤矿用5G通信基站》和NB/T 11547—2024《煤矿用5G通信基站控制器》应用。

图 1 测试地点

Figure 1. Test sites

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图 2 测试设备布置

Figure 2. Test equipment layout

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图 3 拐弯巷道无线收发天线布置

Figure 3. Layout of wireless transmitting and receiving antenna in a curved roadway

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图 4 拐弯巷道中不同频率和距离下无线传输接收功率曲线

Figure 4. Received power curve of wireless transmission at different frequencies and distances in a curved roadway

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图 5 分支巷道无线收发天线布置

Figure 5. Layout of wireless transmitting and receiving antenna in a branch roadway

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图 6 支巷发射时分支巷道不同频率和距离下无线传输接收功率曲线

Figure 6. Received power curve of wireless transmission at different frequencies and distances in a branch roadway with transmitting equipment in a split roadway

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图 7 主巷发射时分支巷道不同频率和距离下无线传输接收功率曲线

Figure 7. Received power curve of wireless transmission at different frequencies and distances in a branch roadway with transmitting equipment in a main roadway

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图 8 拐弯巷道、分支巷道和平直巷道中不同频率下无线传输平均接收功率曲线

Figure 8. Average received power curve of wireless transmission at different frequencies in a curved, branch and straight roadways

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图 9 辅运大巷1中不同频率和距离下无线传输接收功率曲线

Figure 9. Received power curve of wireless transmission at different frequencies and distances in auxiliary transport roadway 1

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图 10 辅运大巷2中不同频率和距离下无线传输接收功率曲线

Figure 10. Received power curve of wireless transmission at different frequencies and distances in auxiliary transport roadway 2

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图 11 掘进巷道中不同频率和距离下无线传输接收功率曲线

Figure 11. Received power curve of wireless transmission at different frequencies and distances in an excavation roadway

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图 12 综采工作面中不同频率和距离下无线传输接收功率曲线

Figure 12. Received power curve of wireless transmission at different frequencies and distances in fully mechanized mining face

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表 1 拐弯巷道中不同频率和距离下无线传输接收功率数据

Table 1 Received power data of wireless transmission at different frequencies and distances in a curved roadway

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
24	−22.28	−22.82	−32.40	−35.15	−37.62	−42.91	−42.60	−41.86	−46.21	−51.59	−45.72	−46.04	−50.76	−51.58	−48.47	−50.90	−56.32	−56.32
28	−22.20	−25.12	−32.24	−45.18	−34.56	−42.98	−54.95	−50.55	−45.21	−58.01	−49.25	−59.45	−60.23	−61.59	−61.76	−64.29	−63.21	−60.06
32	−34.21	−40.98	−34.27	−38.93	−48.81	−47.36	−45.27	−59.60	−49.38	−62.11	−71.49	−55.17	−67.06	−60.63	−62.60	−75.08	−67.38	−74.03
36	−40.55	−48.27	−45.66	−48.81	−45.17	−48.50	−50.72	−62.06	−59.00	−65.62	−62.13	−73.12	−66.40	−75.20	−69.70	−71.04	−69.24	−70.19
40	−37.84	−32.15	−35.25	−61.54	−46.72	−49.25	−55.87	−65.36	−56.72	−65.15	−68.50	−67.28	−67.04	−71.11	−64.93	−69.70	−76.87	−72.05

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表 2 拐弯巷道中不同频率下无线传输平均接收功率

Table 2 Average received power of wireless transmissions at different frequencies in a curved roadway

频率/MHz	无线传输平均接收功率/dBm	频率/MHz	无线传输平均接收功率/dBm
350	−31.42	2 100	−60.50
433	−33.87	2 400	−59.42
550	−35.96	2 600	−60.21
700	−45.92	3 300	−62.30
800	−42.58	3 500	−64.02
900	−46.20	4 200	−61.49
1 300	−49.88	4 900	−66.20
1 700	−55.89	5 400	−66.60
1 900	−51.30	6 000	−66.53

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表 3 支巷发射时分支巷道不同频率和距离下无线传输接收功率数据

Table 3 Received power data of wireless transmission at different frequencies and distances in a branch roadway with transmitting equipment in a split roadway

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
24	−35.99	−24.06	−32.52	−38.29	−37.34	−41.62	−56.66	−35.73	−41.53	−56.73	−49.38	−47.26	−50.90	−47.12	−46.31	−48.80	−61.25	−56.25
28	−32.29	−27.52	−30.38	−49.04	−44.61	−43.36	−45.69	−53.94	−53.64	−47.57	−56.76	−47.23	−67.48	−52.89	−58.82	−56.88	−62.55	−69.30
32	−33.11	−31.06	−43.47	−50.32	−48.58	−45.68	−50.07	−58.09	−59.59	−59.33	−67.01	−57.71	−67.10	−64.37	−67.49	−65.69	−65.94	−66.59
36	−36.68	−38.25	−43.78	−47.44	−43.86	−49.38	−53.87	−58.77	−54.76	−61.33	−71.02	−61.45	−68.94	−65.70	−72.55	−70.06	−68.10	−74.35
40	−39.07	−38.04	−48.29	−50.03	−53.87	−58.54	−58.87	−66.02	−64.92	−67.78	−75.75	−65.23	−78.82	−72.98	−70.17	−88.03	−70.94	−74.19

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表 4 主巷发射时分支巷道不同频率和距离下无线传输接收功率数据

Table 4 Received power data of wireless transmission at different frequencies and distances in a branch roadway with transmitting equipment in a main roadway

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
24	−32.45	−29.13	−37.34	−51.59	−46.13	−43.63	−34.52	−56.16	−45.59	−45.07	−58.16	−60.65	−54.62	−54.58	−49.42	−57.12	−54.99	−53.00
28	−41.37	−37.00	−42.61	−47.94	−57.57	−45.77	−51.76	−56.48	−56.06	−63.36	−61.58	−64.74	−61.74	−57.40	−60.39	−76.91	−59.36	−63.17
32	−32.71	−36.42	−40.75	−52.02	−57.59	−52.03	−50.94	−48.91	−49.96	−54.91	−65.85	−68.14	−71.12	−62.02	−60.43	−71.24	−73.88	−63.52
36	−44.05	−33.22	−60.76	−46.13	−49.06	−46.04	−55.97	−67.89	−55.64	−76.82	−64.63	−66.53	−69.98	−67.52	−69.34	−70.69	−82.48	−73.71
40	−43.41	−42.05	−57.47	−60.01	−62.31	−63.70	−63.66	−60.56	−65.00	−65.90	−63.97	−69.90	−70.66	−75.86	−70.16	−75.49	−78.04	−77.17

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表 5 分支巷道不同频率下无线传输平均接收功率

Table 5 Average received power of wireless transmissions at different frequencies in a branch roadway

频率/ MHz	支巷发射时分支巷道中无线传输平均接收功率/dBm	主巷发射时分支巷道中无线传输平均接收功率/dBm	频率/ MHz	支巷发射时分支巷道中无线传输平均接收功率/dBm	主巷发射时分支巷道中无线传输平均接收功率/dBm
350	−35.43	−38.80	2100	−58.55	−61.21
433	−31.79	−35.56	2400	−63.98	−62.84
550	−39.69	−47.79	2600	−55.78	−65.99
700	−47.02	−51.54	3300	−66.65	−65.62
800	−45.65	−54.53	3500	−60.61	−63.48
900	−47.72	−50.23	4200	−63.07	−61.95
1300	−53.03	−51.37	4900	−65.89	−70.29
1700	−54.51	−58.00	5400	−65.76	−69.75
1900	−54.89	−54.45	6000	−68.14	−66.11

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表 6 平直巷道中不同频率和距离下无线传输接收功率

Table 6 Received power of wireless transmission at different frequencies and distances in a straight roadway

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
24	−18.34	−20.49	−20.47	−27.64	−33.14	−33.21	−37.67	−41.62	−33.66	−37.94	−56.94	−38.67	−48.72	−39.26	−72.71	−49.75	−54.59	−45.46
28	−22.52	−15.93	−25.41	−23.17	−30.45	−39.83	−36.07	−44.59	−37.21	−40.25	−41.45	−38.22	−46.69	−55.20	−43.07	−45.60	−49.32	−47.99
32	−21.36	−21.09	−23.64	−27.71	−25.27	−33.57	−45.50	−41.68	−41.28	−63.74	−53.05	−38.81	−63.47	−46.80	−54.36	−46.00	−56.70	−53.44
36	−18.23	−24.37	−26.31	−28.55	−30.34	−35.08	−39.46	−43.34	−39.82	−40.71	−47.55	−43.74	−44.07	−48.51	−43.67	−49.65	−51.22	−49.94
40	−21.80	−19.99	−27.85	−27.22	−28.29	−31.91	−48.94	−40.60	−34.16	−45.92	−46.68	−50.03	−49.29	−42.23	−50.14	−77.09	−52.49	−44.22
平均接收功率/dBm	−20.45	−20.37	−24.74	−26.86	−29.50	−34.72	−41.53	−42.37	−37.23	−45.71	−49.13	−41.89	−50.45	−46.40	−52.79	−53.62	−52.86	−48.21

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表 7 辅运大巷1中不同频率和距离下无线传输接收功率数据

Table 7 Received power data of radio transmission at different frequencies and distances in auxiliary transport roadway 1

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
1	−14.58	−18.33	−18.66	−19.33	−39.92	−42.72	−21.18	−21.04	−20.27	−19.78	−20.62	−19.03	−22.82	−22.07	−22.74	−23.42	−26.96	−22.42
3	−11.25	−18.50	−23.41	−16.63	−14.48	−18.55	−25.61	−25.21	−23.01	−30.11	−25.61	−26.76	−28.25	−31.66	−30.89	−31.24	−34.18	−30.07
5	−13.70	−14.60	−21.19	−19.29	−25.63	−17.87	−28.85	−30.59	−26.69	−30.16	−28.18	−28.90	−37.04	−32.77	−32.91	−39.24	−41.72	−33.14
10	−21.20	−17.46	−20.77	−30.70	−22.75	−33.45	−26.89	−41.36	−30.35	−42.20	−53.86	−43.84	−36.18	−44.89	−47.46	−37.30	−51.37	−46.68
30	−41.03	−16.16	−21.92	−38.79	−31.29	−35.85	−36.44	−35.82	−36.37	−41.71	−44.27	−40.24	−43.50	−46.59	−51.08	−52.64	−46.49	−45.64
50	−31.20	−19.92	−35.25	−28.75	−32.30	−35.56	−45.02	−45.77	−43.11	−36.09	−50.82	−46.44	−56.57	−48.92	−46.98	−48.15	−60.87	−61.45
70	−30.14	−25.71	−28.91	−38.29	−36.62	−36.01	−45.10	−43.09	−50.50	−44.81	−50.74	−50.15	−49.44	−46.45	−53.23	−52.10	−50.12	−44.82
90	−37.50	−29.78	−34.36	−34.48	−37.30	−39.91	−42.57	−48.70	−47.24	−53.42	−54.93	−55.67	−53.29	−58.60	−46.88	−48.23	−61.16	−56.65
110	−44.20	−36.51	−40.81	−38.16	−39.68	−41.29	−40.80	−52.56	−46.25	−54.16	−58.60	−54.27	−51.43	−52.54	−50.38	−54.39	−60.18	−57.51
130	−48.33	−36.12	−39.70	−38.09	−40.49	−46.83	−45.49	−42.61	−52.57	−53.51	−54.05	−51.72	−58.54	−51.77	−59.83	−54.92	−61.72	−60.07
150	−53.51	−41.79	−43.44	−39.23	−38.78	−41.23	−47.21	−46.86	−51.09	−49.73	−54.06	−52.46	−72.57	−55.06	−63.98	−61.40	−67.39	−56.96
170	−58.66	−46.34	−43.02	−39.67	−41.44	−43.96	−45.61	−46.00	−45.34	−48.36	−52.39	−52.67	−65.97	−57.56	−61.50	−63.96	−65.06	−64.44
190	−60.40	−47.56	−45.00	−43.56	−42.47	−42.76	−50.27	−53.34	−48.85	−52.78	−55.35	−52.78	−64.40	−55.91	−68.19	−61.13	−58.29	−58.05
210	−64.17	−47.13	−47.22	−41.22	−50.13	−44.07	−48.15	−50.28	−50.75	−50.23	−51.44	−50.42	−55.78	−58.97	−65.31	−59.76	−64.02	−63.56
230	−66.72	−50.17	−46.80	−42.36	−41.30	−42.67	−46.00	−52.38	−50.18	−58.53	−52.88	−49.58	−57.95	−53.81	−66.03	−60.59	−68.02	−69.48
250	−70.91	−53.76	−49.18	−41.91	−43.76	−44.48	−45.13	−49.76	−48.26	−55.34	−61.82	−55.46	−59.62	−51.25	−64.03	−69.25	−72.77	−58.58
270	−75.07	−56.71	−50.31	−44.35	−41.89	−43.36	−47.85	−48.45	−48.10	−51.90	−59.29	−55.46	−61.17	−65.78	−57.22	−60.92	−61.29	−61.47
290	−77.84	−57.31	−54.54	−44.49	−46.12	−46.92	−50.54	−49.68	−48.02	−49.79	−54.73	−54.19	−56.81	−62.94	−59.96	−57.40	−62.10	−62.82
310	−81.64	−61.52	−52.73	−46.22	−43.93	−44.68	−49.30	−50.12	−51.23	−53.82	−52.26	−50.43	−55.49	−59.30	−55.97	−61.10	−61.19	−61.80
330	−82.00	−62.32	−58.79	−48.88	−46.52	−47.79	−48.64	−51.14	−50.25	−57.70	−55.87	−54.59	−58.07	−55.11	−57.48	−57.53	−62.35	−66.88
350	−82.93	−65.78	−56.82	−48.70	−47.81	−48.78	−49.57	−52.05	−50.03	−55.91	−61.41	−55.79	−62.26	−58.83	−55.76	−57.60	−67.10	−64.69
370	−84.90	−70.64	−62.62	−49.15	−48.90	−50.20	−49.31	−54.30	−53.62	−55.54	−70.89	−62.80	−56.92	−57.09	−53.74	−56.79	−60.03	−63.74
390	−84.97	−71.01	−61.15	−50.16	−49.05	−48.94	−52.25	−54.11	−51.56	−56.53	−62.73	−63.44	−57.85	−55.90	−54.20	−56.42	−61.75	−66.43
410	−85.36	−71.44	−67.62	−59.75	−49.60	−51.17	−50.56	−52.76	−56.44	−60.01	−63.76	−68.23	−66.33	−55.17	−55.06	−57.03	−57.53	−57.48

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表 8 辅运大巷1中不同频率下无线传输平均接收功率

Table 8 Average received power of radio transmissions at different frequencies in auxiliary transport roadway 1

频率/MHz	无线传输平均接收功率/dBm	频率/MHz	无线传输平均接收功率/dBm
350	−55.09	2100	−48.42
433	−43.19	2400	−52.11
550	−42.68	2600	−49.81
700	−39.26	3300	−53.68
800	−39.67	3500	−51.62
900	−41.21	4200	−53.37
1300	−43.26	4900	−53.44
1700	−45.75	5400	−57.65
1900	−45.00	6000	−55.62

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表 9 辅运大巷2中不同频率和距离下无线传输接收功率数据

Table 9 Received power data of wireless transmission at different frequencies and distances in auxiliary transport roadway 2

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
1	−14.38	−18.35	−23.20	−23.73	−21.78	−24.44	−25.16	−24.83	−24.45	−22.17	−22.13	−20.63	−22.60	−21.31	−21.64	−22.66	−26.43	−21.81
3	−11.11	−21.49	−23.23	−23.90	−21.63	−23.88	−21.94	−24.96	−25.20	−29.90	−26.70	−29.34	−33.84	−30.47	−31.13	−31.31	−37.58	−31.82
5	−11.22	−18.35	−23.39	−20.74	−20.80	−23.96	−41.17	−29.19	−31.19	−29.69	−34.68	−29.07	−31.76	−39.34	−35.42	−35.08	−38.69	−34.55
10	−18.12	−16.47	−20.72	−22.07	−20.16	−22.18	−27.53	−32.27	−31.45	−38.31	−44.81	−36.38	−38.13	−47.16	−36.26	−42.83	−42.17	−44.55
20	−22.15	−24.71	−21.04	−27.47	−28.57	−40.05	−36.16	−34.17	−34.15	−35.27	−39.04	−39.93	−48.68	−42.57	−43.14	−50.97	−43.55	−50.97
30	−27.06	−26.10	−26.10	−25.16	−25.66	−29.47	−54.14	−43.19	−45.00	−38.90	−43.05	−34.05	−49.52	−49.84	−44.98	−42.61	−50.41	−48.54
40	−36.21	−37.00	−33.27	−29.72	−28.97	−32.30	−43.30	−40.03	−35.83	−47.12	−49.74	−47.27	−47.29	−65.30	−62.23	−56.13	−48.12	−46.95
50	−37.05	−53.62	−38.99	−33.22	−38.59	−35.34	−40.25	−34.80	−36.98	−47.42	−43.84	−45.69	−49.05	−44.21	−45.81	−50.53	−56.92	−61.68
70	−48.41	−48.21	−46.65	−37.76	−46.57	−44.66	−37.46	−50.99	−42.66	−48.39	−44.43	−45.75	−58.21	−51.74	−51.65	−53.56	−56.35	−54.70
80	−53.85	−51.44	−48.96	−43.14	−37.09	−44.71	−37.22	−41.94	−42.41	−43.81	−55.21	−42.03	−51.67	−50.92	−55.86	−56.22	−66.26	−60.74
90	−67.00	−62.22	−45.80	−41.90	−42.76	−39.75	−44.05	−45.36	−41.85	−46.43	−56.86	−47.52	−74.74	−54.73	−71.95	−58.34	−58.18	−50.20
100	−71.48	−62.66	−55.62	−42.91	−48.20	−43.37	−41.32	−40.35	−42.98	−49.55	−49.87	−52.20	−52.44	−46.05	−52.75	−59.49	−59.44	−58.91
110	−71.39	−63.25	−59.02	−55.99	−43.49	−48.24	−39.95	−44.29	−41.70	−52.04	−49.57	−46.88	−51.80	−52.33	−49.06	−53.56	−59.86	−63.01
120	−82.03	−66.47	−57.63	−56.39	−44.51	−43.85	−42.42	−41.39	−44.50	−45.01	−48.94	−47.88	−52.04	−52.47	−51.85	−53.15	−66.64	−54.70
130	−78.15	−72.70	−61.52	−59.38	−47.16	−48.48	−53.92	−43.12	−42.96	−46.58	−50.32	−47.03	−53.64	−51.43	−54.14	−59.49	−63.29	−56.01
140	−83.74	−77.96	−65.27	−57.40	−55.81	−47.86	−48.15	−44.04	−44.55	−45.86	−51.88	−48.01	−55.59	−54.75	−58.06	−57.81	−60.25	−57.75
150	−83.90	−74.07	−65.87	−55.04	−51.16	−47.62	−48.77	−46.36	−47.51	−46.60	−49.06	−47.08	−54.04	−51.64	−58.24	−56.12	−57.13	−64.00
160	−83.36	−80.56	−67.56	−59.54	−49.49	−48.12	−49.15	−46.76	−45.28	−51.55	−48.28	−45.72	−53.18	−49.80	−55.58	−61.83	−58.66	−57.28
170	−84.43	−86.00	−69.57	−66.17	−51.34	−49.14	−48.60	−45.12	−44.94	−49.32	−50.37	−49.11	−52.40	−51.55	−55.19	−59.66	−63.65	−58.34
180	−88.55	−83.52	−73.59	−71.27	−51.89	−51.40	−47.34	−48.47	−45.82	−50.02	−51.25	−49.07	−53.88	−52.05	−63.03	−56.64	−63.13	−56.88
190	−86.83	−87.55	−78.42	−65.44	−56.53	−53.43	−45.78	−49.29	−47.26	−50.41	−48.66	−47.98	−54.43	−51.68	−55.56	−58.83	−65.83	−58.14
200	−82.54	−85.92	−74.96	−64.43	−61.27	−54.55	−48.60	−50.56	−50.12	−54.76	−51.76	−48.34	−55.19	−52.24	−54.51	−58.61	−64.82	−66.09

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表 10 辅运大巷2中不同频率下无线传输平均接收功率

Table 10 Average received power of wireless transmissions at different frequencies in auxiliary transport roadway 2

频率/MHz	无线传输平均接收功率/dBm	频率/MHz	无线传输平均接收功率/dBm
350	−56.50	2100	−44.05
433	−55.39	2400	−45.93
550	−49.11	2600	−43.04
700	−44.67	3300	−49.73
800	−40.61	3500	−48.34
900	−40.76	4200	−50.37
1300	−41.93	4900	−51.61
1700	−40.98	5400	−54.88
1900	−40.40	6000	−52.62

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表 11 掘进巷道中不同频率和距离下无线传输接收功率数据

Table 11 Received power data of wireless transmission at different frequencies and distances in an excavation roadway

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
1	−14.32	−13.64	−29.77	−23.69	−17.12	−24.24	−25.01	−25.04	−24.35	−25.56	−21.40	−23.48	−19.54	−19.69	−17.91	−18.05	−22.80	−21.13
3	−13.31	−15.30	−23.42	−23.89	−20.65	−24.63	−22.59	−23.41	−22.02	−23.84	−35.26	−28.72	−34.79	−30.16	−29.14	−31.23	−36.22	−32.53
5	−14.78	−18.64	−21.32	−24.17	−18.80	−28.86	−22.77	−31.07	−25.65	−31.80	−32.94	−28.89	−33.42	−32.05	−34.10	−35.49	−38.69	−34.50
10	−14.77	−17.52	−25.22	−21.16	−20.72	−26.98	−27.91	−46.25	−26.93	−30.94	−36.96	−33.42	−37.86	−38.99	−34.88	−39.32	−40.09	−39.71
20	−18.21	−19.64	−26.50	−21.22	−43.48	−28.84	−37.83	−36.00	−41.75	−41.30	−43.33	−36.66	−40.50	−46.12	−54.53	−44.77	−58.73	−45.85
40	−31.98	−20.34	−31.83	−32.84	−48.24	−38.62	−37.69	−35.95	−49.67	−50.60	−49.04	−44.78	−46.20	−43.15	−47.94	−52.26	−60.17	−56.06
60	−37.87	−30.51	−36.67	−28.73	−28.56	−38.05	−44.76	−32.88	−40.29	−43.00	−41.42	−42.11	−61.25	−63.79	−60.30	−48.24	−50.70	−61.30
80	−55.84	−41.48	−42.97	−32.94	−37.83	−36.35	−52.79	−40.49	−40.25	−44.74	−54.49	−48.90	−57.90	−49.97	−67.96	−56.11	−60.91	−53.08
100	−65.57	−46.48	−45.27	−39.32	−45.96	−42.74	−56.50	−48.13	−49.79	−46.71	−53.90	−46.36	−54.52	−53.27	−54.37	−67.14	−73.62	−57.64
120	−65.76	−53.59	−48.69	−41.56	−40.54	−39.10	−52.04	−51.09	−55.91	−59.91	−61.86	−50.61	−63.75	−60.35	−73.41	−57.30	−58.64	−54.86
140	−75.46	−53.26	−51.13	−39.21	−38.12	−43.48	−63.10	−67.30	−52.82	−57.01	−68.86	−58.60	−59.22	−49.77	−67.63	−70.56	−58.70	−55.41
160	−81.27	−56.43	−53.68	−42.65	−42.49	−47.51	−45.37	−53.65	−54.75	−53.17	−64.95	−62.07	−56.58	−51.39	−58.49	−60.48	−66.11	−59.10
180	−80.30	−65.60	−54.97	−47.23	−46.77	−44.64	−43.63	−43.86	−49.17	−53.22	−53.81	−53.83	−55.88	−65.31	−58.07	−58.71	−61.78	−63.71
200	−84.75	−74.78	−57.04	−45.96	−49.66	−49.90	−46.76	−58.65	−47.33	−59.30	−58.41	−56.42	−59.42	−59.86	−59.29	−60.80	−68.02	−64.48
250	−93.94	−83.46	−66.01	−52.53	−52.73	−58.50	−58.45	−58.71	−58.60	−60.79	−63.02	−59.11	−57.62	−59.28	−72.98	−69.16	−69.94	−63.78
300	−97.02	−95.52	−75.08	−57.01	−55.67	−57.49	−55.28	−57.72	−53.45	−58.45	−59.87	−53.58	−58.67	−62.76	−74.47	−66.66	−74.26	−71.03
350	−95.53	−100.33	−83.01	−64.47	−59.15	−60.35	−57.85	−57.29	−56.31	−55.93	−60.08	−66.81	−63.54	−59.53	−67.18	−72.27	−73.25	−71.68
400	−95.46	−100.98	−93.89	−69.26	−62.64	−63.31	−60.43	−61.53	−60.96	−66.34	−70.60	−71.80	−64.42	−65.07	−72.81	−74.50	−68.89	−75.44
450	−96.19	−99.01	−95.77	−76.39	−67.08	−66.13	−62.82	−61.24	−60.81	−71.64	−77.96	−64.77	−65.49	−64.66	−70.69	−73.70	−80.95	−84.38
500	−95.11	−101.17	−99.95	−83.76	−80.35	−78.76	−73.08	−64.32	−69.74	−78.78	−81.82	−81.40	−76.22	−76.48	−76.35	−85.81	−90.66	−86.32

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表 12 掘进巷道中不同频率下无线传输平均接收功率

Table 12 Average received power of wireless transmission at different frequencies in an excavation roadway

频率/MHz	无线传输平均接收功率/dBm	频率/MHz	无线传输平均接收功率/dBm
350	−61.37	2100	−50.65
433	−55.38	2400	−54.50
550	−53.11	2600	−50.62
700	−43.40	3300	−53.34
800	−43.83	3500	−52.58
900	−44.92	4200	−57.62
1300	−47.33	4900	−57.13
1700	−47.73	5400	−60.66
1900	−47.03	6000	−57.60

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表 13 综采工作面中不同频率和距离下无线传输接收功率数据

Table 13 Received power data of wireless transmission at different frequencies and distances in fully mechanized mining face

收发天线距离/m	无线传输接收功率/dBm
收发天线距离/m	350 MHz	433 MHz	550 MHz	700 MHz	800 MHz	900 MHz	1300 MHz	1700 MHz	1900 MHz	2100 MHz	2400 MHz	2600 MHz	3300 MHz	3500 MHz	4200 MHz	4900 MHz	5400 MHz	6000 MHz
7.00	−20.06	−22.84	−21.70	−22.88	−22.46	−21.56	−22.73	−26.05	−23.36	−26.55	−29.82	−23.37	−37.15	−30.41	−35.91	−38.40	−41.09	−39.90
59.50	−51.86	−47.86	−49.91	−49.00	−55.39	−54.67	−52.76	−63.12	−61.29	−53.55	−58.16	−71.53	−70.60	−49.87	−53.92	−57.74	−68.58	−56.91
71.75	−59.22	−54.54	−53.92	−51.17	−49.17	−52.92	−52.72	−65.82	−54.65	−56.78	−65.57	−65.34	−76.44	−65.57	−70.51	−64.95	−61.60	−59.20
98.00	−69.49	−73.47	−63.20	−67.66	−64.41	−68.03	−65.03	−65.25	−63.10	−68.94	−64.87	−62.20	−65.38	−63.63	−72.63	−78.02	−79.40	−67.00

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表 14 综采工作面中不同频率下无线传输平均接收功率

Table 14 Average received power of wireless transmission at different frequencies in fully mechanized mining face

频率/MHz	无线传输平均接收功率/dBm	频率/MHz	无线传输平均接收功率/dBm
350	−50.16	2100	−51.46
433	−49.68	2400	−54.61
550	−47.18	2600	−55.61
700	−47.68	3300	−62.39
800	−47.86	3500	−52.37
900	−49.30	4200	−58.24
1300	−48.31	4900	−59.78
1700	−55.06	5400	−62.67
1900	−50.60	6000	−55.75

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