关键词: 破坏机理, 中空注浆锚索, 数值分析, 巷道支护

Abstract: In order to solve the problem of controlling the stability of gob side entry in thick coal seam, taking Buertai coal mine as the engineering background, the surrounding rock failure mechanism of 42108 auxiliary haulage trough and the integrated control countermeasures of bolting and grouting are systematically studied by means of field investigation, numerical analysis and field industrial test. The results show that: the deformation of the surrounding rock is more obvious due to the influence of low rock strength, superposition of strong mining stress, thick layer of hard roof and groundwater in 42108 auxiliary transportation chute. The top gang deformation and right gang deformation of the roadway during the damage of 42108 auxiliary transport chute are obvious in the numerical simulation results, which are 658mm and 602mm respectively. The top, bottom, left and right gang displacements of the surrounding rock are 149mm, 26mm, 7.7mm and 79mm respectively after adopting the integrated anchor injection control countermeasures, which are reduced by 77.3%, 62.9%, 98.3% and 86.8% respectively. It is verified by field engineering application that the roadway can carry the deformation and pressure caused by the influence of mining under the hollow anchor cable grouting support, and the field application effect is good.