摘要
为了缓解矿井采掘紧张、提升煤炭资源回收率,以8105工作面为背景,通过预裂切顶卸压、顶板超前补强和滞后加固以及巷旁挡矸支护对留巷围岩进行综合控制,实现了运输顺槽成功留巷。矿压观测表明,预裂切缝降低了工作面顶板压力,在滞后工作面120 m后留巷巷道围岩变形趋于平稳,补强锚索受力不大,能够维持留巷围岩稳定。
In order to alleviate the tension of mine excavation and improve the recovery rate of coal resources, taking the 8105 working face as the background, the surrounding rock of reserved roadway is comprehensively controlled through pre splitting roof cutting and pressure relief, advance reinforcement and lag reinforcement of roof, and gangue retaining support beside roadway, so as to realize the successful retention of roadway along transportation channel.The ground pressure observation shows that the pre splitting and cutting joint reduces the roof pressure of the working face. After 120 m behind the working face, the deformation of the surrounding rock of the reserved roadway tends to be stable, and the stress of the reinforced anchor cable is small, which can maintain the stability of the surrounding rock of the reserved roadway.
作者
冯磊
Feng Lei(Lvliang Coal Output Control Center,Shanxi Lvliang 033000)
出处
《山东煤炭科技》
2021年第10期1-3,9,共4页
Shandong Coal Science and Technology
关键词
综采
沿空留巷
切缝
支护
fully mechanized mining
gob-side entry retaining
slit
support
