Application of Advance Grouting in Control of Surrounding Rock of Roadway Tunneling through Broken Zone
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.
roadway drivingfracture zoneadvance groutingsurrounding rock control
万方数据
维普
