主控软弱层凝灰岩对边坡稳定的影响机理研究  

Study on influence mechanism of weak layer tuff on slope stability

作　　者：李静涛 LI Jingtao(China Coal Pingshuo Group Co.,Ltd.,Shuozhou 036000,China)

机构地区：[1]中煤平朔集团有限公司,山西朔州036000

出　　处：《露天采矿技术》2023年第2期83-86,共4页Opencast Mining Technology

摘　　要：针对安太堡露天煤矿东帮边坡失稳问题,在钻探及现场踏勘的基础上,采用3DMine软件建立工程地质模型及剖面模型,运用极限平衡法对边坡稳定性计算分析与评价,利用MIDASGTSNX有限元数值分析软件对其进行模拟分析,探寻边坡破坏模式。结果表明:在地层整体顺倾、裂隙发育、凝灰岩赋存的地质条件下,经过数值模拟与现场实际对比认为导致该区域片帮的主要控制因素为赋存凝灰岩弱层,变形区域边坡破坏模式为沿着坡体下部凝灰岩的“坐落-滑移式”破坏。Aiming at the instability of the east slope in Antaibao Open-pit Coal Mine,on the basis of drilling and field survey,we use 3DMine software to establish the engineering geological model and profile model,and use the limit equilibrium method to calculate and analyze and evaluate the slope stability.The article uses MIDASGTSNX finite element numerical analysis software to simulate and analyze to explore the slope failure mode.The results show that under the geological conditions of overall dip of the stratum,fracture development and tuff occurrence,through the comparison between numerical simulation and field practice,it is considered that the main control factor leading to the slope in this area is the occurrence of tuff weak layer,and the slope failure mode in the deformation area is"sitting sliding"failure along the tuff in the lower part of the slope.

关 键 词：凝灰岩 弱层 数值模拟 边坡稳定分析 边坡失稳 

分 类 号：TD824.7[矿业工程—煤矿开采]