The stress distribution of coal and rock mass and the risk evaluation of rock burst in the composite structure area
-
摘要: 工作面构造区域应力异常集中与冲击地压关系密切，而基于煤岩体波速与应力的良好相关性，地震波CT探测技术广泛用于冲击地压危险性评价与预警，但现有研究仅针对简单条件或单一构造区域，未对存在多种地质构造形成的复合构造区域进行探讨。以山东某矿2305综放工作面为例，针对其复合构造区域内微震事件集中且曾发生过冲击地压的情况，采用地震波CT探测技术获取构造区域内煤岩体应力分布情况，并引入含地震波波速和波速梯度的特征指数c分析应力分布特征及冲击地压危险性。研究结果表明：① 微震事件分布集中与邻近构造相关，可将集中区域按构造数量分为单一或复合区域，按受扰动程度分为强或弱扰动区域。② 强扰动复合构造区域静态应力集中程度最高，弱扰动单一构造区域应力集中程度最低；断层单一构造区域应力增高水平与受扰动程度呈正相关关系；低扰动复合构造区域内向斜较断层应力增高显著。③ 构造区域围岩静态应力集中是导致围岩活动剧烈的主要原因，综合考虑围岩静载荷与采动影响下动载荷增量情况，可得出不同微震事件集中区域的冲击地压危险性。Abstract: The abnormal concentration of stress in the structure area of the working face is closely related to the rock burst. Based on the good correlation between the wave velocity and stress of the coal and rock mass, the seismic wave CT detection technology is widely used in the evaluation and warning of the risk of rock burst. However, the existing researches are mainly focused on simple conditions or single structure area. The composite structure area formed by multiple geological structures has not been discussed. Taking the 2305 fully mechanized working face of a mine in Shandong as an example, in the context of the concentration of microseismic events in the composite structure area and the occurrence of rock bursts, the seismic wave CT detection technology is used to obtain the stress distribution of coal and rock mass in the structure area and the characteristic index c including speed and speed gradient of seismic wave is introduced to analyze the stress distribution characteristics and the risk of rock burst. The research results show that: ① The concentration of microseismic events is related to adjacent structures. The concentrated areas can be divided into single or composite areas according to the number of structures, and can be divided into strongly or weakly disturbed areas according to the degree of disturbance. ② The strongly disturbed area composite structure area has the highest static stress concentration, and the weakly disturbed single structure area has the lowest stress concentration. The stress increase level of the fault single structure area is positively correlated with the degree of disturbance. The syncline in the weakly disturbed composite structure area has a significantly higher stress than the fault area. ③ The static stress concentration of the surrounding rock in the structure area is the main cause of intense surrounding rock activity. Based on the static load of surrounding rock and the dynamic load increment under the influence of mining, the risk of rock burst in the concentrated area of different microseismic events can be obtained.
-
-
期刊类型引用(19)
1. 李坤. 煤矿井下钻杆装卸机器人末端执行机构设计与分析. 煤矿安全. 2023(03): 226-231 . 
百度学术
2. 韩健，彭涛，宋海涛. 煤矿自动加杆装置液压控制系统开发. 煤矿机械. 2023(06): 122-124 . 百度学术
3. 孟瑞，方鹏. ZDY23000LDK电液控制大功率定向钻机研制与应用. 煤矿机械. 2023(06): 167-170 . 百度学术
4. 张硕，田慕琴，霍鹏飞，曹永飞. 基于一维卷积神经网络的定向钻机故障诊断专家系统设计. 煤炭技术. 2023(06): 221-224 . 百度学术
5. 李旺年，张幼振，田宏亮，李泉新，魏宏超. 基于煤岩可钻性的钻孔机器人自适应控制方法. 工矿自动化. 2023(06): 182-188 . 本站查看
6. 阚志涛，方鹏，张锐，钟自成. 自动化钻机辅助连续换杆装置设计. 煤炭技术. 2023(09): 207-209 . 百度学术
7. 高晓亮. 煤矿井下智能化钻探配套钻具研究进展. 煤田地质与勘探. 2023(10): 156-166 . 百度学术
8. 李泉新，姚克，方俊，姚亚峰，史春宝. 煤矿井下瓦斯高效精准抽采定向钻进技术与装备. 煤炭科学技术. 2023(S1): 65-72 . 百度学术
9. 董洪波，范强，李坤，马斌. ZDY4500LFK全自动钻机开发与应用. 煤田地质与勘探. 2022(01): 66-71 . 百度学术
10. 方鹏，姚克，王龙鹏，张锐，孟瑞，王松，邵俊杰，刘璞. ZDY25000LDK智能化定向钻进装备关键技术研究. 煤田地质与勘探. 2022(01): 72-79 . 百度学术
11. 刘智. 煤矿坑道钻机大直径钻杆上卸装置设计. 煤矿安全. 2022(05): 129-132+137 . 百度学术
12. 刘智. 煤矿坑道钻机上卸钻杆装置及方法研究. 煤矿机电. 2022(02): 32-35 . 百度学术
13. 李兆奎，田慕琴，宋建成. 基于故障树的定向钻机故障诊断专家系统设计. 现代电子技术. 2022(22): 121-125 . 百度学术
14. 李兆奎，田慕琴，宋建成. 钻机回转液压系统仿真与健康评估. 现代电子技术. 2022(23): 105-108 . 百度学术
15. 姚克，李泉新，方俊，方鹏，王龙鹏，田东庄，陈龙，许超. 煤矿井下旋转地质导向钻进技术装备研究. 煤炭科学技术. 2022(12): 36-42 . 百度学术
16. 马宏伟，姚阳，薛旭升，王川伟，高佳晨. 基于多传感器组合的钻锚机器人机身定位方法研究. 煤炭科学技术. 2021(01): 278-285 . 百度学术
17. 韩健. 全液压逻辑控制自动加杆装置的研发. 煤矿机械. 2021(07): 120-122 . 百度学术
18. 韩健. 煤矿全液压自动加杆装置的开发与应用. 煤矿安全. 2021(07): 151-154 . 百度学术
19. 李泉新，刘飞，方俊，刘建林，褚志伟. 我国煤矿井下智能化钻探技术装备发展与展望. 煤田地质与勘探. 2021(06): 265-272 . 百度学术
其他类型引用(6)
下载:
