考虑稳态渗流影响的边坡稳定性分析  

Analysis on slope stability considering the influence of steady-state seepage

作　　者：杨晓伟 赵忠奇 YANG Xiaowei;ZHAO Zhongqi(Baorixile Open-pit Coal Mine,State Energy Group Shenbao Energy Co.,Ltd.,Hulunbuir 021000,China)

机构地区：[1]国家能源集团神宝能源有限公司宝日希勒露天煤矿,内蒙古呼伦贝尔021000

出　　处：《露天采矿技术》2024年第3期58-61,共4页Opencast Mining Technology

摘　　要：基于宝日希勒露天矿2022年末采场边坡现状,通过有限元分析法建立耦合渗流和稳定性分析边坡计算模型,采取Morgenstern-Price法对渗流作用进行分析,并对1#煤积水坑边坡进行了稳态渗流模拟,得到了稳态渗流孔隙压力分布规律。结果表明:在压力水头等值线以上,孔隙水压力均为负,越靠近边坡表面负孔隙水压力值越大,顶部为-400 kPa;下部孔隙水压力均为正,越远离边坡表面正孔隙水压力值越大,底部为800 kPa,整体流量呈现向坡脚处集中趋势;1#煤积水坑位置处2022年末现状边坡稳定性系满足安全储备系数要求。Based on the slope current situation of Baorixile Open-pit Mine at the end of 2022,the article establishes a coupled seepage and stability analysis slope calculation model using finite element analysis method,uses the Morgenstern Price method to analyze the seepage effect,and conducts steady-state seepage simulation on the slope of No.1 coal water logging pit,obtaining the distribution law of steady-state seepage pore pressure.The results show that above the pressure head contour line,the pore water pressure is negative,and the negative pore water pressure value increases as it approaches the slope surface,with a top pressure of-400 kPa.The lower pore water pressure is positive,the farther away from the slope surface,the greater the positive pore water pressure value is,and the bottom is 800 kPa.The overall flow shows a central tendency trend towards the slope toe.The current slope stability system at the location of 1 coal sump at the end of 2022 meets the requirements of safety reserve coefficient.

关 键 词：渗流场分析 稳态渗流计算 采场边坡 孔隙水压力 边坡稳定 

分 类 号：TD824.7[矿业工程—煤矿开采]