摘要
平宝公司己15-17-12100机巷施工断面由4600×3000mm变更为5200×4000mm,在高强锚杆+钢带+高强锚索联合支护技术的基础上增加锚注技术,改善其整体性,提高煤岩体的自承能力,降低巷道顶板下沉量,减少围岩两帮收缩量,进而提高巷道支护效果,解决平宝公司大埋深、大跨度、大断面和高应力条件下煤巷顶板支护技术难题。
Pingbao Company changed the constructed section of the roadway from 4600×3000mm to 5200×4000mm.On the basis of the combined supporting technology of high strength bolt,steel belt and high-strength anchor cable,the bolting-grouting technology is applied to improve its integrity,enhance the self-supporting ability of coal and rock mass,control the roof subsidence of the roadway and the shrinkage of both sides of surrounding rock.As a result,the supporting effect of the roadway is improved,which solves the technical problems of roof supporting under the conditions of large buried depth,large span,large cross-section and high stress in Pingbao Company.
作者
陈建勋
王海涛
Chen Jian-xun;Wang Hai-tao(Henan Pingbao Coal Industry Co.,Ltd.,Henan Xuchang 461700)
出处
《山东煤炭科技》
2019年第12期60-62,共3页
Shandong Coal Science and Technology
关键词
煤巷
高强
锚注
支护
coal roadway
high-strength
anchor grouting
support
