Research on Numerical Simulation of Progressive Failure and Seepage Evolution of Coal Floor
According to the complex geological conditions of Luzigou mine,a stope mechanical model under the influence of faults is established.The mechanical mechanism of fault expansion and evolution into confined water upflowing channel is characterized by using the activation mechanical criterion of faults.The fault activation and water inrush seepage are simulated by RFPA2D-Flow software.The results show that the wedge action of confined water along the fault is the internal factor that promotes the fracture propagation.The fault will be activated under the action of shear stress on both sides during the mining of upper and footwall,and the water inrush channel will be formed eventually.
Floor water inrushNumerical simulationGeological structureFault activationFloor confined water
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