多煤层开采条带错动程度对岩层控制的影响

针对我国多煤层条带开采的实际情况,提出了煤层错动系数的概念。利用FLAC3D数值模拟软件,系统地研究了多煤层条带开采时,上下煤层错动系数的大小对上下条带保护煤柱应力、中间岩体应力以及地表移动变形的影响规律,分别给出了相应的函数关系式,并指出了在实际多煤层条带开采时,极限煤层错动系数的求取方法。研究成果对于指导多煤层条带开采工作面设计具有十分重要的理论和现实意义。

Influence of Strip Dislocation Degree on the Strata Control in Multi-coal Seam Mining

In view of the actual situation of multi-coal seam strip mining in China，the concept of coal dislocation coefficient is put forward.Based on the FLAC3D numerical simulation software，the influencing laws of different coal dislocation coefficients on the stress of upper and lower bands protection coal pillar，the stress of intermediate rock and surface movement deformation in multi-coal seam strip mining were studied systematically.The reason for the influencing law is analyzed，and the function relations were given.The calculating method of ultimate coal dislocation coefficient in multi-coal seam strip mining was pointed out.The research results have important theoretical and practical significance for the coal face design of multi-coal seam strip mining.