The Numerical Simulation of The Influence from Fault Dip Angle on Coalface Pressure

This paper simulated the effects of faults on mine pressure distributions in coal mining process by using UDEC4.0 numerical simulation software. The rock burst mechanisms of normal faults and thrust faults were analyzed first. After that, the working face of front abutment pressure peak values and distributions were studied by the initial model during the working face is mined in the hanging wall and footwall of fault. At last, when the distance between working face and fault is 20 meters, the working face front abutment pressure peak values variation under different fault dip angles was researched. It turned out that: When the working face is mined in the footwall of fault, the working face front abutment pressure peak values firstly increase with the increases of fault dip angles. When the fault dip angle is about 70 °, the front abutment pressure peak value reaches the maximum of 73.57 MPa. When the working face is mined in the hanging wall of fault, the working face front abutment pressure peak values are roughly into a rising trend with the increases of fault dip