浅埋不同间距煤层群开采对地表沉陷的影响

Influence of the Mining of Coal Seam Group with Different Spacing in a Shallow Depth to Surface Subsidence

根据大柳塔煤矿地质条件，采用 FLAC3D数值模拟软件进行模拟分析，得到了10～40 m不同间距煤层群岩层垂直位移云图及地表下沉曲线，探讨了地表最大下沉值与煤层群间距的关系，分析了不同煤层群间距下的地表沉陷规律。结果表明：随煤层群间距增加，对地表下沉的影响呈函数关系减小，同时地表下沉盆地边缘收敛缓慢。为浅埋不同间距煤层群开采地表沉陷防治与治理提供了参考。

coal seam group mining,the surface subsidence value changes with the difference of the coal seam group spacing.According to the geological conditions,based on the FLAC3D numerical software, the vertical displacement cloud diagram and subsidence curve of the coal seam group with spacing from 10 m to 40 m,besides that,the surface subsidence law of the coal seam group with different spacing is ana-lyzed.The research results show that,the influence of surface subsidence decreases by function relation as the coal seam group spacing increase,meanwhile,the edge of land subsidence basin with slow conver-gent speed.The above research results can provide reference for prevention and treatment of surface sub-sidence of the coal seam group with different spacing under the similar conditions.