Fault activation of fully mechanized caving face in extra-thick coal seam of deep shaft

被引：0
|
作者：
Zhu S. [1 ]
Jiang F. [1 ]
Kouame K.J.A. [1 ]
Li X. [2 ]
Tan W. [2 ]
Zhang B. [2 ]
Zhang H. [2 ]
机构：
[1] School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing
[2] Shandong Xinjulong Energy Limited Liability Company, Heze, 274918, Shandong
来源：
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | 2016年 / 35卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Deep shaft; Extra-thick coal seam; Fault activation; Microseismic monitoring; Mining engineering;
D O I：
10.13722/j.cnki.jrme.2014.1574
中图分类号：
学科分类号：
摘要：
The mechanism of the fault activation in the extra-thick coal seam of deep shaft at the fully mechanized caving face 2301N passing through a fault in Xinjulong Mine was studied using micro seismic monitoring, numerical simulation and theoretical analysis. The process of fault activation was divided into a stress appearance stage (at a distance of 274.8-214 m from the fault), an energy storage stage (at a distance of 214-84 m from the fault) and a structure activation stage (at a distance of 84-0 m from the fault) according to the microseismic monitoring results, which was verified by numerical simulation. Two kinds of rock burst, fault-activated rockburst and fault-coal-pillar rock burst, both occurred when the working face passed through the fault. The mechanism of fault-activated rock burst was attributed to the accumulated tectonic stress release in both sides of the coal-rock mass adjacent to the fault, and the mechanism of fault-coal-pillar rock burst resulted from the high stress concentration caused by mining activities in fault coal pillar. The corresponding control technologies were put forward based on the analysis of the rock burst mechanisms in the process of working face passing through the fault. The field application of these technologies has effectively ensured the safety of mining passing through the fault. © 2016, Science Press. All right reserved.
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页码：50 / 58
页数：8
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