Analysis of Features of Rock Movement and Seepage Mechanism for Shallow-lying Coal Seam Mining

Applying the Coupling System of Flow Solid in Rock Failure Process Analysis(F-RFPA2D) developed by CRISR,Northeastern University, taking a working face of Daliuta coal mine for example,the geomechanics model is constructed.The numerical results reproduce the dynamic process of overburden failure,and reveal the change law of the roof failure,the abutment pressure of overlying strata,support pressure of coal wall and surface subsidence with the mining process.Especially the permeation process caused by the rock strata crack propagation and coalescence can be obtained directly.The simulative results basically tally with the ones observed in practice,which will be of important significance for accelerating the high efficiency and safety mining of western coalfields.