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以杨村煤矿10605工作面F5逆断层为研究对象,采用三维有限差分数值软件FLAC~(3D)模拟研究了断层倾角对逆断层活化的影响,揭示了断层倾角对逆断层活化影响的规律。结果表明,当开采逆断层下盘煤层时,断层倾角越小,断层带上的应力就越大;断层倾角越小,断层带两盘相对滑移量越大;断层带受采动影响显现出的孔隙压力范围及破坏程度随断层倾角的增大而减小。小倾角逆断层容易活化,诱发断层突水危险性大,所需留设的防水煤柱的宽度越大。
Taking F5 reverse fault of 10605 working face of Yangcun Coal Mine as an example, the influence of fault dip on activation of reverse fault was studied by using FLAC 3D simulation of finite difference numerical software, and the influence of fault dip on activation of reverse fault was revealed. The results show that the stress on the fault zone increases with the decrease of the fault dip angle when the coal seam under the fault is exploited. The smaller the fault dip angle is, the larger the relative slip between the two fault zones is. The fault zone is affected by mining The pore pressure range and the degree of damage decrease with the increase of fault dip angle. Inverted faults with small dip angle are easy to activate, and the risk of water inrush from the fault is large. The larger the width of the water-proof coal pillar to be set aside.