Numerical simulation of the overburden failure characteristics of different spacing-coal mining

Based on the layer conditions of the researched mining coal,the engineering geological model is generated for finite element numerical simulation to find out the subsidence feature of different spacing multi-seam mining,as well as comparative analysis the relationship of multi-seam mining displacement of overlying rock with distance change.The differences in overburden failure law of different spacing-coal mining is revealed,providing a theoretical basis for engineering Practice.