祁东煤矿近距离煤层群瓦斯治理顶板拦截定向钻孔试验

张朝举; 方俊; 杨亚黎; 王鲜; 杨小继

doi:10.13272/j.issn.1671-251x.2021020016

祁东煤矿近距离煤层群瓦斯治理顶板拦截定向钻孔试验

doi: 10.13272/j.issn.1671-251x.2021020016

1. 恒源煤电集团有限公司祁东煤矿, 安徽宿州 234000;
2. 中煤科工集团西安研究院有限公司, 陕西西安 710077

基金项目:

“十三五”国家科技重大专项资助项目（2016ZX05045-003-001）。

详细信息

作者简介:
张朝举(1979-),男,安徽濉溪人,高级工程师,现从事煤矿采矿工程和"一通三防"管理与科研工作,E-mail:113455494@qq.com。

通讯作者:
方俊(1985-),男,湖北谷城人,副研究员,博士,主要从事煤矿钻探技术与装备的研发工作,E-mail:fangjun@cctgxian.com。

中图分类号: TD712
计量
- 文章访问数: 66
- HTML全文浏览量: 4
- PDF下载量: 6
- 被引次数: 0
出版历程
- 收稿日期: 2021-02-04
- 修回日期: 2021-11-08
- 刊出日期: 2021-11-20

Test of roof interception directional drilling for close distance coal seam group gas control in Qidong Coal Mine

1. Qidong Coal Mine, Hengyuan Coal-electricity Group Co., Ltd., Suzhou 234000, China;
2. Xi'an Research Institute Co., Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China

摘要

摘要: 针对现有近距离煤层群瓦斯治理方法存在工程量大、成本高、周期长的问题，以祁东煤矿94采区为研究对象，提出了采用顶板拦截定向钻孔进行瓦斯治理的方法：首先在开采煤层顶板施工带有多个上向分支孔的顶板拦截定向钻孔，然后利用上向分支孔提前对上邻近煤层瓦斯进行预抽，最后利用主孔在煤层回采过程中对上邻近煤层卸压瓦斯和开采煤层回采工作面及采空区瓦斯进行抽采，从采前预抽和采动卸压抽采2个方面提高了近距离煤层群瓦斯抽采效果，解决了瓦斯赋存参数测量、复杂破碎地层定向成孔与护孔等难题。针对顶板拦截定向钻孔设计与施工难题，采用定向钻孔煤层探查与保压密闭取芯技术、复合定向钻进与复合排渣技术、钢筛管完孔技术，实现了近距离煤层群中顶板拦截定向钻孔高效成孔和长距离精准瓦斯测定。在祁东煤矿94采区进行了现场试验，完成顶板拦截定向钻孔1个，主孔深度608 m，施工分支孔6个，密闭取芯测试瓦斯含量2次，下入护孔筛管485 m，进行瓦斯抽采试验207 d，初始瓦斯抽采纯量为0.35 m³/min，抽采30 d后逐渐下降至0.1 m³/min以下，抽采65 d后整体稳定在0.05 m³/min左右。试验结果表明，顶板拦截定向钻孔可有效预抽邻近煤层瓦斯，提前降低煤层瓦斯含量，从源头上减少后期工作面回采时的采动卸压瓦斯涌出量。
- 近距离煤层群 /
- 瓦斯治理 /
- 瓦斯抽采 /
- 顶板拦截定向钻孔 /
- 钻孔抽采 /
- 保压密闭取芯 /
- 复合定向钻进
Abstract: In the existing methods of close distance coal seam group gas control, there are problems such as large engineering quantities, high cost and long cycle.In order to solve the above problems, taking the 94 mining area of Qidong Coal Mine as the research object, a gas control method by using roof interception directional drilling is proposed.Firstly, the roof interception directional drilling with multiple upward branch holes is constructed in the roof of the mining coal seam.Secondly, the upward branch holes are used to extract the gas from the upper adjacent coal seam in advance.Finally, the main hole is used to extract the pressure relief gas from the upper adjacent seam and the gas from the working face of the mining coal seam and the goaf during the coal seam mining.This method improves the gas extraction effect of the close coal seam group from two aspects of pre-extraction and mining pressure relief extraction, and solves the problems of gas occurrence parameter measurement and directional drilling and hole protection in complex fractured formation.In order to solve the problems of the design and construction of roof interception directional drilling, the method adopts directional drilling for coal seam exploration and pressure maintaining sealed coring technology, composite directional drilling and composite slag removal technology, and steel screen pipe completion technology to realize efficient hole formation of roof interception directional drilling for close coal seam group and long-distance accurate gas measurement.Field tests are carried out in the 94 mining area of Qidong Coal Mine.One roof interception directional drilling is completed, the main hole depth is 608 m, the construction branch holes are 6, the gas content is tested by sealed coring technology twice, and the lower protective screen pipe is 485 m.The gas extraction test is carried out for 207 days.The initial gas extraction net amount is 0.35 m³/min.After 30 days of extraction, gas extraction net amount gradually drops to below 0.1 m³/min.After 65 days of extraction, the overall gas extraction net amount remains stable.The test results show that the roof interception directional drilling can pre-extract the adjacent coal seam gas effectively, reduce the coal seam gas content in advance, and reduce the pressure relief gas emission from the source during the later mining of the working face.
- close distance coal seam group /
- gas control /
- gas extraction /
- roof interception directional drilling /
- borehole extraction /
- pressure maintaining sealed coring /
- composite directional drilling

HTML全文

参考文献(16)

[1]	李兴.近距离煤层群瓦斯抽采技术优选及抽采模式研究[D].湘潭:湖南科技大学,2016. LI Xing.Gas drainage technology optimization and drainage model study of close-distance coal seams group[D].Xiangtan:Hunan University of Science and Technology,2016.
[2]	李家卓,谭文峰,李传明,等.近距离煤层群工作面采场围岩失稳机制与控制技术[J].中国安全科学学报,2017,27(5):122-127. LI Jiazhuo,TAN Wenfeng,LI Chuanming,et al.Mechanism of instability of surrounding rock of stope in close distance coal seam group and control technology[J].China Safety Science Journal, 2017,27(5):122-127.
[3]	程志恒,陈亮,苏士龙,等.近距离煤层群井上下联合防突模式及其效果动态评价[J].煤炭学报,2020,45(5):1635-1647. CHENG Zhiheng,CHEN Liang,SU Shilong,et al.Outburst prevention mode of ground and underground technology joint and its dynamic evaluation in contiguous coal seams[J].Journal of China Coal Society,2020,45(5):1635-1647.
[4]	丁勇,李绍泉,李树清.近距离煤层群二次卸压开采瓦斯富集区分布研究[J].煤炭技术,2017,36(5):165-167. DING Yong,LI Shaoquan,LI Shuqing.Research of close-distance coal seams group secondary pressure relief mining gas-accumulation area[J].Coal Technology,2017,36(5):165-167.
[5]	薛彦平.近距离煤层群综采工作面瓦斯治理优选措施[J].工矿自动化,2021,47(2):98-103. XUE Yanping.Optimal measures for gas control on fully mechanized working face of close-distance coal seam group[J].Industry and Mine Automation,2021,47(2):98-103.
[6]	邓成均.突出矿井煤层群开采瓦斯联合抽采技术研究[J].中国矿山工程,2021,50(1):79-81. DENG Chengjun.Study on combined gas drainage technologyof coal seam group mining in outburst mine[J].China Mine Engineering,2021,50(1):79-81.
[7]	刘雪莉,游继军.近距离突出煤层群瓦斯治理技术优化的研究[J].武汉工程大学学报,2021,43(1):86-90. LIU Xueli,YOU Jijun.Optimization of gas control technology in contiguous outburst coal seams[J].Journal of Wuhan Institute of Technology,2021,43(1):86-90.
[8]	田强国.祁东煤矿地质构造对煤与瓦斯突出的影响研究[D].淮南:安徽理工大学,2009 . TIAN Qiangguo.The study on the influence of geologic structure on gas outburst in Qidong Coal Mine[D].Huainan:Auhui University of Science and Technology,2009
[9]	韩兵.基于定向钻进技术的综合立体瓦斯抽采模式[J].工矿自动化,2019,45(12):12-16. HAN Bing.Comprehensive three-dimensional gas drainage mode based on directional drilling technology[J].Industry and Mine Automation,2019,45(12):12-16.
[10]	白刚,杨忠,段会军.定向高位长钻孔上隅角瓦斯治理技术[J].工矿自动化,2020,46(3):84-88. BAI Gang,YANG Zhong,DUAN Huijun.Gas control technology of directional high-level long borehole at upper corner[J].Industry and Mine Automation,2020,46(3):84-88.
[11]	孙四清,张群,龙威成,等.煤矿井下长钻孔煤层瓦斯含量精准测试技术及装置[J].煤田地质与勘探,2019,47(4):1-5. SUN Siqing,ZHANG Qun,LONG Weicheng,et al.Accurate test technology and device for coal seam gas content in long boreholes in underground coal mines[J].Coal Geology & Exploration,2019,47(4):1-5.
[12]	刘建林,方俊,褚志伟,等.碎软煤层空气泡沫复合定向钻进技术应用研究[J].煤田地质与勘探,2021,49(5):278-285. LIU Jianlin,FANG Jun,CHU Zhiwei,et al.Application of air foam composite directional drilling technology in broken soft coal seams[J].Coal Geology & Exploration,2021,49(5):278-285.
[13]	李平,童碧,许超.顶板复杂地层高位定向钻孔成孔工艺研究[J].煤田地质与勘探,2018,46(4):197-201. LI Ping,TONG Bi,XU Chao.Study on hole-forming technology of high level directional borehole in complicated roof strata[J].Coal Geology & Exploration,2018,46(4):197-201.
[14]	童碧,许超,王鲜,等.淮南矿区复杂顶板高位定向孔复合排渣钻进技术[J].煤炭科学技术,2020,48(增刊1):140-143. TONG Bi,XU Chao,WANG Xian,et al.Compound slag removal technology of high directional drilling for complex roof in Huainan Mining Area[J].Coal Science and Technology,2020,48(S1):140-143.
[15]	孙保山.ZDY6000LD(B)履带式坑道钻机调角机构仿真[J].煤矿安全,2014,45(4):123-125. SUN Baoshan.Simulation on angle modulation mechanism of crawler tunnel drilling rig[J].Safety in Coal Mines,2014,45(4):123-125.
[16]	张占强.BLY390型煤矿井下钻探用泥浆泵车设计[J].矿山机械,2016,44(3):17-19. ZHANG Zhanqiang.Design of BLY390 slurry pump crawler for drilling in underground colliery[J].Mining & Processing Equipment,2016,44(3):17-19.