挑水河磷矿近断层破碎带回采巷道稳定性研究.pdfVIP

Series No．491 金 属 矿 山 总第491期 May 2017 METAL MINE 2017年第5期 挑水河磷矿近断层破碎带回采巷道稳定性研究 池秀文 张舰伟 王 沛 (武汉理工大学资源与环境工程学院,湖北 武汉430070) 摘 要 复杂地质条件下地下矿山巷道的稳定性是矿山围岩控制的难点。 针对宜昌挑水河缓倾斜磷矿体近断 层回采巷道,采用数值模拟方法,设置5组不同的工况条件进行对比研究。 研究结果表明:回采巷道靠近断层时,由于 暴露的采空区面积较大,会加大断层破碎带对于巷道稳定性的影响,必须尽量避免沿倾向布置,如果一定需要采用倾 向布置回采巷道,则应当加大断层保安矿柱的安全距离,并且注意靠近断层处采空区的围岩变化;回采巷道沿走向布 置时,15 m 的保安矿柱可使单条带回采时的巷道基本处于稳定之中,但对于需要多条带同时开采的采区,则需要至少 20 m 以上的断层保安矿柱。 关键词 缓倾斜磷矿 近断层 回采巷道 数值模拟 中图分类号 TD871 文献标志码 A 文章编号 1001-1250(2017)-05-024-05 Stability of Mining Roadway Near Fault Fracture Zone in Tiaoshuihe Phosphorus Mine Chi Xiuwen Zhang Jianwei Wang Pei (College of Resource and Environment Engineering,Wuhan University of Technology,Wuhan430070,China) Abstract The stability of underground mine roadway under complex geological conditions is a difficult problem of sur- rounding rock controlling.According to the inclined mining roadway phosphate ore-body near fault of Tiaoshuihe Phosphorus Mine inYichang,thenumericalsimulationmethodisusedtosetup5groupsofdifferentworkingconditionssoconductcompar- ison and analysis of the mining roadway stability.The study results show that:when the mining roadway near the fault,due to the exposed are ofthemined-outareaislarge,whichwillenlargetheinfluenceoffaultfracturezonetoroadway stability,sothe roadway shouldbeavoidedarrangingalongthetendency direction,if not,the safety distanceoffault safety pillarsshouldbein- creased,besides that,the the change characteristics of surrounding rock of the mined-out area near thefaults of should be no- ticed;when the mining roadway is arranged along the heading direction,th