Slurry Leakage Channel Detection and Slurry Transport Process Simulation for Overburden Bed Separation Grouting Project: A Case Study from the Wuyang Coal Mine, Northern China

The 8006 working face at the Wuyang Coal Mine adopts grout injection into bed separation technology for surface subsidence control. Surface leakage occurred during process of this face. Grout has adverse effects on grouting filling effect, cost and environment. To determine channels slurry transport process, to provide a theoretical basis prevention control, paper first used 3D seismic exploration identify fault distribution characteristics study area, then COMSOL Multiphysics carry out numerical simulation process. conclusions are as follows. Fifteen normal faults were identified in vicinity Among all faults, F1, F11, F18, F19 F27 penetrate main run surface. Based spatial location relationship among separation, points, analysis causes each point was carried out, proposed be faults. results show that, permeability space is much better than that surrounding rock, diffuses through turn, finally surface, where occurs. confirm