摘要
北洺河铁矿-95 m水平4#采场为缓倾斜中厚矿体,矿体底板含不稳岩层,岩体节理裂隙发育,而且受相邻采场采动压力作用的时间长达2 a之久,进路联巷及回采进路在掘进过程中或成巷后不久就发生片帮冒顶。二次支护中投入大量U型可缩式金属拱架,但仍未能控制住巷道围岩的变形与破坏。为此采用了卸压措施,获得显著成效。详细介绍了4#采场的卸压开采经验,并对卸压参数与最佳卸压时间等进行讨论。
The ore-body in -95 m sublevel 4# stope of Beiminghe Iron Mine is gently inclined medium thick orebody, and the floor of ore-body is at unstable strata and the fissure grows in joint. Moreover, it has been bearing the mining pressure from adjacent stopes for two years. The side fall root caving appeared during the tunneling of cross roadway and stope or after tunneling. Although lots of compressible ＂U＂-shaped metal arch are adopted in secondary support,but the drifts＂ deformation and destruction cant be controlled. Therefore, the pressure relief measures are used, obtaining remarkable effect. The paper described the depressurized mining experience of 4# stope in detail, and discussed the parameters and the best time of pressure relief.
出处
《金属矿山》
CAS
北大核心
2012年第2期9-11,共3页
Metal Mine
关键词
采动压力
高应力区
卸压开采
Mining pressure, High stress area, Depressurized mining
