Deformation and damage mechanisms and coupling support design in deep coal roadway with compound roof

作者：He Manchao^*; Qi Gan; Cheng Cheng; Zhang Guofeng; Sun Xiaoming

来源：Chinese Journal of Rock Mechanics and Engineering, 2007, 26(5): 987-993.

• Compound roof
• Coupling support
• Deep coal gateway
• Deep coal roadway
• Deep mining engineering
• Geological conditions
• Geomechanical evaluation
• Jiahe
• Mechanical conditions
• Nonlinear mechanical phenomena
• Numerical simulation
• Surrounding rock

As the mining depth increasing, geological and mechanical conditions of roadway become more complicated compared with those in shallow roadway. Consequently, the nonlinear mechanical phenomena occur with high frequency, which brings about great difficulties for deep engineering support during excavation and mining. These problems caused by the deep mining engineering are the focuses in the fields of mining engineering and rock mechanics. A lot of achievements have been obtained by scholars through theoretical study, experimental test, and in-situ test. The loose and cracked compound roof of working face 2442 in Jiahe Coal Mine is difficult to control by using traditional support measures which increase the walls shrink and the floor heave and greatly affect the normal excavation and safe production. Based on the in-situ investigation, experimental test, analysis of engineering geological conditions, geomechanical evaluation and numerical simulation, the deformation and damage mechanisms of the roadway are analyzed; and then the bolt-mesh-cable coupling support design is put forward. The result of in-situ test shows that the new design can ultimately guarantee the stability of deep coal gateway. The design scheme of bolt-mesh-cable coupling support is feasible and efficient for the stability control of surrounding rock in deep mining engineering.

• 出版日期2007
• 单位中国矿业大学（北京）