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为避免神华宝日希勒露天矿南帮边坡变形加剧而最终引发滑坡灾害,基于现场地质勘查的结论和岩土体物理力学试验,分析了南帮边坡变形破坏的机理和边坡破坏模式,并对现状稳定性和长期稳定性进行了分析;综合考虑矿山开采现状及未来规划,通过对比治理措施,最终确定采取坡底压脚的方案来进行边坡治理,并对边坡治理效果进行了分析。结论表明:南帮+610 m平盘压脚长度取115 m,单台阶段高25 m,+625 m平盘压脚长度取137 m,单台阶段高为20 m时,整体边坡的稳定系数可达1.204,满足边坡稳定需要,并通过数值计算、极限平衡计算验证了治理方案的合理性;同时,确定了潜在滑坡区域坡脚煤层采用窄条带分层快采、内排及时跟进方法,确保了煤炭资源的安全、高效回收。
In order to avoid the landslide disaster caused by the exacerbation of the southern slope of the Shenhua Baojihile open-cut mine, based on the conclusion of on-site geological survey and the physical and mechanical tests of rock and soil, the deformation and failure mechanism and slope failure Mode, and analyzes the status quo stability and long-term stability. Considering the status quo and future planning of the mining, the scheme of slope bottom pressure footing is finally determined for slope control by contrasting the control measures, and the effect of slope treatment Analyzed. The results show that the length of the presser foot of the south block of +610 m is 115 m, the height of the presser foot is +255 m and the length of the +625 m presser foot is 137 m. When the single stage height is 20 m, the overall stability of the slope Coefficient up to 1.204 to meet the needs of slope stability, and through the numerical calculation, the limit equilibrium calculation to verify the rationality of the treatment plan; the same time, to determine the potential landslide area slope foot strata stratified fast mining, timely with the Into the method to ensure the safety of coal resources, efficient recovery.