Design Optimization Study On Multi-roadway Tunneling Process Of Si He Mine W2301Face

For modern high-gas coal mine, the ventilation, transport of materials, gas drainage andother needs, to adopt quasi-multi-lane roadway cross-section parallel to the major trends intunneling has become imperative. But in the multi-lane parallel to the tunneling process, isbound to bring stress superposition and concentration, leading to coal-gas outburst, tunnel roofand floor deformation, favoring other phenomenon. This thesis use si he mine w2301face as theengineering background Integrated use of theoretical analysis physical experiment numericalsimulation and field measurement to simulation for the mine excavation. Analysis of the adjacentroadway at different axial distance, different order of tunneling, protect of the coal pillar sizeaffect to stress distribution around the tunnel and deformation or roof and floor. Determining areasonable axial distance between the two roadway, On this basis, determined the reasonableprotection of coal pillar sine. It provides a theoretical basis for the high-yield production mine.