摘要
采用FLAC3D数值模拟软件,以义马煤矿25110工作面为原型,对逆冲断层周围地应力分布进行数值模拟,分析了断层剖面、断层下盘剖面与煤层截面相交处、沿煤层倾向方向剖面的地应力分布,得出断层的存在使得上下盘的应力出现了不连续,岩层与煤层不同的物理力学性质在高应力下也表现出了不同的受力状态,最大主应力、最小主应力分布分别与z方向应力、水平x方向应力基本一致,为有冲击矿压危险的煤层进行防突优化设计提供了依据。
Taking No.25110 working face in Yima Coal Mine as the research object,using FLAC3D software,the paper makes a numerical simulation on the ground stress distribution a-round the thrust fault and analyzes the stress distribution of fault section,footwall section and the intersection of the coal seams sections,and section along coal seam inclination direction to have obtained that because of the fault,the stress of the hanging wall and footwall is discontinu-ous;under high stress,the stress states of rocks and coal seams is different for their different physical and mechanical properties;distribution of maximum principal stress and minimum prin-cipal stress respectively accord with the stress of the vertical z-direction and the horizontal x-di-rection.These results provide theoretical basis for the outburst prevention optimal design for the coal seam with risk of rock burst.
出处
《中国煤炭》
北大核心
2014年第2期64-66,94,共4页
China Coal
关键词
逆冲断层
地应力
FLAC3D数值模拟
最大主应力
最小主应力
thrust fault
ground stress
FLAC3D numerical simulation
maximum principal stress
minimum principal stress
