摘要
为了解决海石湾矿煤一层6112工作面回风平巷大变形问题,研究了巷道变形破坏机理,并从巷道重新布置和锚杆支护参数优化2个角度分别提出2套解决方案,现场实测结果表明,采用HRB335高强锚杆配合18.9 mm小孔径预应力锚索的稳定性控制技术对巷道进行翻修以后,回风平巷顶底及两帮移近量均得到有效控制,杜绝了以往巷道反复维修的困境。
In order to solve the problem of large deformation of 6112 working face in return air drift of Haishiwan coal mine No. 1 coal seam, the paper studied the deformation mechanism, and proposed two sets of solutions from the aspects of roadway re - arrangement and the optimization of bolting parameters. Field test results showed that after roadway repairing by using the stability control technology of HRB335 high strength anchor with618.9 small - bore prestressed anchor cable, the convergence of roof and floor and two sides of re- turn air drift had been effectively controlled, which eliminated the problems of roadway repeated maintenance in the past.
出处
《煤矿安全》
CAS
北大核心
2012年第8期82-85,共4页
Safety in Coal Mines
关键词
回采巷道
大变形
高强预应力锚杆
巷道翻修
数值模拟
mining gateway
large deformation
high - strength prestressed anchor
roadway repairing
numerical simulation
