Mechanism and prevention of rock burst in deep irregular isolated coal pillar

被引：0
|
作者：
Xue C. [1 ]
Cao A. [1 ]
Niu F. [2 ]
Wang X. [1 ]
Shen Z. [3 ]
Tang K. [3 ]
机构：
[1] Key Laboratory of Deep Coal Resource Mining Ministry of Education, School of Mines, China University of Mining and Technology, Xuzhou, 221116, Jiangsu
[2] Madaotou Coal Industry Co Ltd, Datong Coal Mine Group, Datong, 037003, Shanxi
[3] Yaoqiao Coal Mine, Shanghai Datun Energy CoLtd, Xuzhou, 221611, Jiangsu
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2021年 / 38卷 / 03期
关键词：
Instability of coal pillar; Isolated coal pillar; Overburden structure; Rock burst;
D O I：
10.13545/j.cnki.jmse.2020.0057
中图分类号：
学科分类号：
摘要：
In view of prevention and control of rock burst of irregular isolated coal pillar in the central mining area of some mine, the mechanism of pillar burst was studied through theoretical analysis, numerical simulation, and field practice, and the rock burst control scheme of coal and rock mass strength weakening in coal pillar area was put forward. The distribution of abutment pressure under different coal pillar sizes was identified, and the rock burst mechanism of deep irregular isolated coal pillar was revealed based on spatial structure characteristics of overburden.The results have shown that the overburden structure of isolated coal pillar takes asymmetric "T" shape in vertical section, and coal pillarsare "high stress irregular isolated ones" with asymmetric "saddle-shaped" stress distribution. The simulation results have shown that the abutment pressure of isolated coal pillar is asymmetric distribution, and the peak value of pillar vertical stress continuously rises and transfers to the deep mining area with the increase of goaf. The formulation of dynamic and static scheme to reduce load, release pressure, and prevent burst reduces the stress of rock mass in the irregular coal pillar area, which effectively prevent rock burst of irregular coal pillar in the deep mining area. © 2021, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
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页码：479 / 486
页数：7
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