煤炭与化工2024，Vol.47Issue(5)：14-18,5.DOI:10.19286/j.cnki.cci.2024.05.004
切顶卸压及复合支护体系在沿空留巷中的应用
Application of roof cutting pressure relief and composite support system in gob-side entry retaining
刘春记1
作者信息
- 1. 晋能控股煤业集团临汾宏大矿业有限责任公司,山西临汾 041000
- 折叠
摘要
Abstract
In order to solve the serious problems of mine pressure and roadway deformation caused by the combination of thick hard roof and plastic floor in No.W3305 fully mechanized working face,the geological conditions of the working face were analyzed,and the bidirectional directional blasting method was adopted to cut off the cantilever beam structure of the open side roof of the working face and reduce the revolving stress of the key layer of the roof.The roof and floor of the roadway along the empty side were supported steadily by casting the flexible mold wall and strengthening the bottom plate by grouting.Through the new integrated support of anchor cable,the failure of anchor cable and broken roof cable were solved.The results showed that the strategy of bidirectional shaped blasting,roof cutting and pressure relief,flexible mold wall support,new anchor cable support and floor soft rock reinforcement can effectively solve the problem of roadway deformation and instability,and save about 5 million yuan.关键词
切顶卸压/聚能爆破/沿空留巷/柔模墙/注浆锚索Key words
roof cutting pressure relief/shaped charge blasting/gob-side entry retaining/flexible mold wall/grouting anchor cable分类
矿业与冶金引用本文复制引用
刘春记..切顶卸压及复合支护体系在沿空留巷中的应用[J].煤炭与化工,2024,47(5):14-18,5.
