In view of the poor deformation control effect of the roof leakage,wall collapse and surrounding rock deformation during the supporting of the surrounding rock of roadway in the fault fracture zone by the anchoring mesh and cable shotcrete support,it was proposed to strengthen the fractured rock mass of the roof by advance grouting to create good conditions for roadway excavation and subsequent support work.Based on the site conditions of 3905 transport roadway,the types of grouting materials,the layout of grouting holes and the grouting technology were given in detail,and the engineering application was carried out.The results show that the advance grouting can significantly improve the overall stability and strength of the broken surrounding rock,and no problems such as roof leakage and wall collapse occur again during the roadway passing through the broken zone;at the same time,the deformation of the roof and floor and the roadway wall were controlled within 64 mm and 61 mm respectively,and the deformation of the surrounding rock was small on the whole.
关键词
巷道掘进/破碎带/超前注浆/围岩控制
Key words
roadway driving/fracture zone/advance grouting/surrounding rock control
维普
万方数据