摘要
针对煤层较薄而顶板较厚较坚硬的情况,在回采工作面推进过程中对断层活化的影响。采用数值模拟方式进行分析,通过对不同推进距离、顶板管理方式、断层倾角、断层内摩擦角、断层内聚力进行比较研究,得到采取放顶充填方式,断层内聚力为2MPa,活化起始推进距离为90m,断层活化深度为21.5m。不采取放顶充填方式,断层内聚力为0.5 MPa,活化起始推进距离为60m,断层活化深度为52.1m,断层面破坏严重,有可能形成导水通道。
With thin coal seams as well as thicker and harder roofs, the caving face was affected by fault activation in the advancing process. Numerical simulation was used to compare the different advancing distances, roof management approaches, fault inclination angles, fault internal friction angles, and fault cohesion. The results show, with the top coal filling method, the cohesive force is 2 MPa, the starting advancing distance of the fault activation is 90 m, and the depth is 21.5; without the top coal filling method, the cohesive force is 0.5 MPa, the starting advancing distance of the fault activation is 60 m, and the depth is 52.1. In addition, since the fault face is severely damaged, it is possible to form water channels.
作者
郝瑞云
郭五平
HAO Ruiyun GUO Wuping(Institute of Science and Technology Co. , Ltd. , Shanxi Coal Import ＆ Export Group, Taiyuan 030006, Chin)
出处
《山西煤炭》
2017年第3期15-18,30,共5页
Shanxi Coal
关键词
薄煤层
断层活化
内摩擦角
推进距离
Thin coal seam
Fault activation
internal friction Angle
forward distance
