Study on influence of layered mining of extra thick coal seam on faults based on similar materials test

In order to study the coal mining thick coal seam layering mining influence on fault,according to the actual situation of coal seam,using the methods of similar material simulation experiment,the development regularity of the fault influenced by the special thick coal seam layering mining.The results show that F18 and F16 are greatly affected by mining and seriously damaged.The working face advancing direction is the same with the fault dip direction,causing the fault at the top of the mobile deformation is greater than at the bottom of the movement,makeing F1 in aquifer groundwater easily through mining fissure import face;The movement value of fault F18 at the interface between the rock strata on the working face and the working face is the largest.When the 57002 working face is repeatedly mined,fault development causes similar materials in the water-conducting fracture zone to reach the bottom of the load,indicating that the water-conducting fracture zone may reach the surface.