关键词: 复合顶板, 巷道变形, 注浆锚索, 锚网索

Abstract: Surrounding rock intense deformation and easy roof caving of composite roof, is one of the difficult roadway supporting technology. For Xincun coal mine 3207 rail lane gateway loose and broken composite roof, large amount of roof subsidence, anchor cable broken, etc. Combining with onsite investigation and mine pressure observation, authors analyzed the reasons of roadway deformation and failure, the rule of composite roof roadway deformation and main control technology, proposed coordination support of grouting anchor and anchor net, to strengthen the intensity of roof support and give full play to the bearing capacity of surrounding rock. Using "prestressed hollow grouting anchor and bolt-mesh-anchor" combination supporting scheme, the onsite industrial test showed that the support scheme can effectively control the deformation of surrounding rock of roadway.