Study on the mining of sand-proof coal pillars in coal mine working based on FLAC3D simulation study
According to Qian Ying cumin coal mine aquifer W3232 working face accurate safe mining as the re-search background,according to the field hydrogeological exploration data,field drilling sampling,analyze the face water factors,and use FLAC3D numerical simulation software,establish the face mining model,study the rock mining destruction rule,and predict the ＂ two belt＂ development height simulated mining damage evolution characteristics,multi-angle in the W3232 working face reasonable fortification sand coal column mechanism.The results show that the vertical stress and displacement of the surrounding rock on the working face and the surrounding rock are studied.The simulation results show that the maximum value of the water fissure zone height and the height of the collapse zone are 41.43m,12.31m respectively,and the collapse zone will not affect the＂four content＂ during mining.Therefore,the working face has the conditions of fortified sand pillar mining,and can realize safe and green mining.
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