摘要
为了研究安家岭露天矿东帮陡帮开采边坡稳定性,采用FLAC^(3D)对典型剖面进行数值模拟,分析位移、应力和应变,确定其破坏模式;采用极限平衡法(M-P法)对2个典型剖面1045 m水平下部以5 m为步距减小平盘宽度的陡帮开采方案进行稳定性计算。结果表明:东帮边坡破坏模式为沿岩体内部大致呈“圆弧式”破坏,当1045 m水平下部整体向东推进35 m时,典型剖面边坡稳定系数分别为1.051、1.05,满足安全储备系数1.05要求。该陡帮开采方案单位长度实现煤炭资源多回收量约1100 t,剥采比约为0.97 m^(3)/t,在满足安全储备前提下实现了经济效益最大化。
To investigate the slope stability of steep slope mining in the east slope of Anjialing Open-pit Mine,the article adopts FLAC^(3D) to conduct numerical simulations of typical cross-sections,and analyzes displacement,stress,and strain to determine the failure mode.The article uses limit equilibrium method(M-P method)to calculate the stability of two representative cross-sections below the 1045 level under a steep mining scheme with 5 m stepwise reductions in bench width.The results show that the failure mode of the east slope follows an approximately"circular arc"pattern within the rock mass.When the entire area below the 1045 m level advances 35 m eastward,the stability factors for the two typical cross-sections reach 1.051 and 1.05,meeting the required safety reserve coefficient of 1.05.This steep slope mining scheme achieves additional coal recovery of 1,100 tons per meter length with a stripping ratio of approximately 0.97 m^(3)/t,maximizing economic benefits while ensuring safety margins.
作者
邓增兵
李静涛
王燕涛
DENG Zengbing;LI Jingtao;WANG Yantao(China Coal Pingshuo Group Co.,Ltd.,Shuozhou 036000,China)
出处
《露天采矿技术》
2025年第5期34-38,共5页
Opencast Mining Technology
关键词
陡帮开采
数值模拟
极限平衡法
边坡稳定性
经济效益
steep slope mining
numerical simulation
limit equilibrium method
slope stability
economic benefit
