摘要
为了研究黑山露天煤矿存在安全隐患的边坡及削坡能否解决边坡失稳的问题,采用了极限平衡法与数值模拟方法对边坡削坡前后进行了稳定性对比分析,得出削坡后的稳定性大于安全储备系数,能保证现场正常施工。结果表明:露天矿边坡滑坡模式为单台阶楔体滑坡,塑性应变未贯穿整个边坡;削坡的稳定系数大于安全储备系数,削坡前后坡度减小20°左右,削坡后的平盘仍可以满足露天矿的正常生产与运输;通过数值模拟证明了水平最大位移发生在+2460^+2490平盘之间,最大塑性应变发生在+2460-+2475平盘之间;塑性应变未贯穿到坡顶,边坡此时未遭到整体破坏。
In order to study the slope with potential safety hazards in Heishan open pit coal mine,whether the slope cutting can solve the problem of slope instability is adopted.The limit equilibrium method and numerical simulation method are used to analyze the stability of the slope before and after the slope cutting.The stability after the slope cutting is greater than the safety reserve coefficient to ensure the normal construction on site.The results show that the slope sliding mode of the open pit coal mine is a single step wedge Landslide and plastic strain do not penetrate the whole slope;the stability coefficient of slope cutting is greater than the safety reserve coefficient,and the slope before and after slope cutting is reduced by about 20°,and the flat plate after slope cutting can still meet the normal production and transportation of the open pit mine;through numerical simulation,it is proved that the maximum horizontal displacement occurs between+2460-+2490 flat plate,the maximum plastic strain occurs between+2460-+2475 flat plate,and the plastic strain is not Through to the top of the slope,the slope is not damaged as a whole at this time.
作者
马明康
缪海宾
马熹焱
赵贺
张东旭
MA Mingkang;MIAO Haibin;MA Xiyan;ZHAO He;ZHANG Dongxu(China Coal Technology and Engineering Group Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Mine Safety Technology,Fushun 113122,China)
出处
《露天采矿技术》
CAS
2020年第5期33-35,40,共4页
Opencast Mining Technology
基金
国家重点研发计划资助项目(2017YFC1503101)
中国煤炭科工集团有限公司科技创新创业资金专项资助项目(2019-QN002)。
关键词
稳定性分析
极限平衡
滑坡模式
削坡
数值模拟
stability analysis
limit equilibrium
Landslide mode
slope cutting
numerical simulation
