摘要
为治理安家岭矿区露天边坡滑坡及井工矿开采巷道变形,采用FLAC数值模拟,详细分析了内排土压脚回填前后安家岭露天矿边坡及在该边坡下布置的井工矿巷道围岩的应力场及位移场变化规律,并重点分析了不同回填高度对边坡及巷道稳定性的影响。研究结果表明,回填至标高+1358.8m后巷道破坏区不再与前端煤柱破坏区相连通,回填至标高+1393.6m后边坡及巷道围岩的水平位移减少幅度超过60%,煤柱承载力弱化比例明显降低。
In order to control the slope sliding and the gateway deformation in Anjialing Mine with the surface and underground combined mining, the FLAC numerical simulation was applied to in detail analyze the before and after in-pit dumping with the compacted foot back- fill, the stress field and displacement variation law of the surface mine slope and the gateway surrounding rock under the surface mine slope and to analyze the different backfill height affected to the surface mine slope stability and to the underground mine gateway stability. The research results showed that when the backfill height was up to the elevation of ＋ 1 358.8 m, the gateway failure zone would not be connected with the failure zone of the front coal pillars and when it was up to the elevation of ＋ 1 393.6 m, the horizontal displacement of the slope and gateway would be reduced over 60%. The avianization percentage of the coal pillar bearing capacity was obviously reduced.
出处
《煤炭科学技术》
CAS
北大核心
2010年第1期20-23,共4页
Coal Science and Technology
关键词
压脚回填
边坡稳定性
巷道稳定性
回填高度
compacted foot backfill
slope stability
gateway stability
backfill height
