Stability analysis and characteristic of seismic activity during roadway development in soft rock

被引：0

作者：

Wang L. ^{[1
,2
]}

Wang Q. ^{[1
,2
]}

Li S. ^{[1
]}

Xu N. ^{[3
]}

Pan R. ^{[1
,2
]}

He M. ^{[2
]}

Xu Y. ^{[1
,2
]}

Zhang H. ^{[1
,2
]}

机构：

[1] Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan, 250061, Shandong

[2] Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology (Beijing), Beijing

[3] State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, 610065, Sichuan

来源：

Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2018年 / 35卷 / 01期

关键词：

Key position; MS monitoring; Quantitative evaluation; Soft rock roadway;

D O I：

10.13545/j.cnki.jmse.2018.01.002

中图分类号：

学科分类号：

摘要：

For studying the failure mechanism of surrounding rock during roadway development in soft rock, an ESG monitoring system is applied to monitor surrounding rock failure in roadway of mining face 4106 of Liangjia coal mine. Characteristics of seismic activity during roadway development in soft rock is analyzed. Interactions between seismic activity and the convergence of roadway as well as supporting structures force are studied. The results show that: 1) Moment magnitude of microseismic events are mainly concentrated in -2.770-0.589 during roadway development in soft rock, the average value of moment magnitude of microseismic events is -1.5; Microseismic events are divided into three regions, they are high-density area(0-2 m), medium density area(2-6 m) and low density area (other than 6 m). 2) Microseismic events mainly gather in roof, shoulder and bottom of roadway where they are the most serious failure sites of surrounding rock. 3) Seismic activity is consistent with the convergence of roadway and supporting structures force. The results show that it is feasible to combine the traditional monitoring technique with the microseismic monitoring system to quantitatively monitor failure of surrounding rock, it can make up the limitations by using qualitative analysis for rock failure. © 2018, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.

引用

页码：10 / 18

页数：8

共 17 条

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