Research on The Law of Skewed Sinking of Overburden-Ground Caused by High-Intensity Mining
Scientific understanding and mastery of overburden breakage characteristics and surface subsidence law is an important foundation for green coal mining,which is conducive to reducing the extent of damage to surface buildings and ecological environment caused by coal mining disturbance.Based on the discrete element simulation software,a numerical model was established to investigate the characteristics of overburden breakage and movement under different advancing distances,and the skewed subsidence law of surface was obtained,and the reliability of research results was verified by means of theoretical analysis and physical simulation.The results show that the rock fracture angle on the side of the open cut is larger than the rock fracture angle on the side of the longwall face,and the skewed collapse of overburden is transmitted to surface,resulting in the skewed subsidence of surface.The research results provide innovative theoretical support for the development of coal damage reduction mining technology.
Green miningOverburden breakageSkewed subsidenceMining induced fracture
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