露天转地下L型工作面开采上覆岩体稳定性分析及边坡治理方案  

Stability Analysis of Overlying Rock Mass of L Working Face Moving from Open-pit to Underground Mining and Slope Treatment Schemes

作　　者：孙世国[1] 张玉娟[1] 张英海[1] 缪爱伟[1] 

机构地区：[1]北方工业大学,北京100144

出　　处：《煤矿安全》2016年第9期158-161,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(41172250);"十二五"国家科技支撑资助项目(2012BAK09B06);北京市创新团队提升计划资助项目(IDHT20140501);北京市科研基地建设-科研创新平台资助项目(PXM2014_014212_000007);北方工业大学校内科研专项资助项目(XN083;XN107)

摘　　要：以乌海矿露天转地下开采工程实践为背景,应用数值模拟方法对L型工作面不同开采方案进行了模拟分析,探讨了地下采区由里向外和由外向里不同开采推进顺序对边坡破坏的影响机制,得出:当从里向外开采时,边坡向地下采空区移动,对边坡稳定性有利;从外向里开采时,边坡向外侧临空面移动,加速边坡的滑动破坏,对边坡稳定不利。因此应采用由里向外推进的开采方案;同时根据该矿的实际工况设计了减载锚固的加固方法,减小滑坡破坏程度,保证工程安全生产。Taking the L working face of open - pit to underground mining in Wuhai Coal Mine as an example, based on the numerical simulation software FLAC3D which made a detail analysis of deformation and mechanism of rock slope aimed at the two different mining schemes from inside to outside and outgoing, the results proved that when the mining sequence is from inside to outside, the slope moves to the underground mined - out area, which is good for slope stability; on the contrary, it would accelerate the failure speed, which is adverse to the slope stability. So underground mining should adopt the mining design of outward driving. At the same time, in order to ensure the safety of production and reduce landslide extent of the damage, we designed anchoring reinforcement method for load shedding based on the actual conditions.

关 键 词：露天转地下开采 开采方案 FLAC^(3D) 数值模拟 破坏机制 边坡治理 

分 类 号：TD824.7[矿业工程—煤矿开采]