深部逆断层倾角对煤岩冲击失稳作用的数值模拟  

Numerical Simulation of Coal and Rock Bump Instability Affected by Thrust Fault Dip in Deep Mining

作　　者：贾艳武 付巍 

机构地区：[1]煤科集团沈阳研究院有限公司,辽宁沈阳110016 [2]煤矿安全技术国家重点实验室,辽宁沈阳110016

出　　处：《煤矿安全》2015年第3期171-174,共4页Safety in Coal Mines

摘　　要：利用FLAC3D的强大数值模拟计算能力,以义马矿区为背景,建立了逆断层的简化数值模型,研究了不同断层倾角条件下的工作面超前支承压力与弹性能分布规律。研究表明:随着采掘面不断临近断层,工作面超前支承压力受断层影响显著增高;当工作面距断层40 m且断层倾角小于45°时,工作面超前支承压力峰值随着断层倾角增大而增大;当断层倾角大于45°时,工作面超前支承压力峰值随断层倾角的增大而减小;断层倾角为30°的能量峰值最低,断层倾角为45°的能量峰值最高。Taking Yima mining area as the background,the simplified numerical model of thrust fault is established with FLAC3 Dwhich has the strong numerical simulation ability. The distribution law is studied that the abutment pressure and elastic energy of the working face under different fault dip condition. The research results show that the abutment pressure of working face remarkably increases with the mining face constantly close to the fault. The abutment pressure peak of working face will increase with the fault dips increasing when the distance from the working face to the fault is 40 m and the fault dip is less than 45°. Moreover,the abutment pressure peak of working face will be decrease with the fault dips increasing when the fault dip is more than 45°. Meanwhile,the energy peak is minimum when the fault dip is 30°,and the energy peak is maximum when the fault dip is 45°.

关 键 词：冲击失稳 逆断层 断层倾角 超前支承压力 弹性能 数值模拟 

分 类 号：TD324.1[矿业工程—矿井建设]