摘要
介绍了唐洞煤矿在缓倾斜炮采工作面应用砌筑矸石墙和留小护巷煤柱2种留巷方式的工程实践,阐述了2种留巷方式的工艺流程和要求,采用极限平衡理论计算得到2244工作面顺槽合理的最小煤柱宽度为2.8m.通过对留巷工艺巷道变形的监测及掘进工期、煤炭回收率的计算分析,结果表明,这2种沿空留巷技术能有效的控制巷道的变形,在矿井生产中能实现减少巷道掘进工程量、缓解采掘接替压力、提高煤炭回收率,取得了显著的技术经济效益;为类似条件的煤矿沿空留巷提供了有益的借鉴.
Engineering practice of implementation of the masonry waste rock wall and retain small coal pillar in gently inclined blasting mining face to stay lane in Tangdong Mine was introduced. The process and requirements of the two processes were described in remain lane. The reasonable minimum coal pillar width is 2.8 m in 2244 working face by limit equilibrium theory. Results show that both the along goaf technology can effectively control the deformation of the roadway. They can achieve the same effect of reducing the amount of roadway excavation works, easing the extractive succeed pressure, improving the coal recovery by analysis of roadway deformation, economic benefits, boring duration and coal recoveries. It can achieve significantly technical and economic benefits. It can also provide useful references for gob - side entry retaining in the coal mine with similar condition.
出处
《矿业工程研究》
2012年第4期1-3,12,共4页
Mineral Engineering Research
关键词
缓倾斜煤层
炮采
沿空留巷
窄煤柱
矸石墙
gently inclined coal seam
blast mining
gob -side entry retaining
small coal pillar
waste rock wall
