摘要
为了探讨多弱层边坡变形破坏机理,以某露天矿北帮边坡为例,综合分析以往勘探资料及研究成果,确定岩土体物理力学指标推荐值,并建立典型工程地质模型剖面。借助有限元软件分析边坡破坏机理,利用极限平衡法计算边坡稳定系数,并进行边坡形态优化。结果表明:多边坡破坏模式主要为沿弱层的“坐落—滑移式”滑动,易呈现多滑体滑动,弱层为破坏主控层;设计边坡稳定性沿弱层(1)(2)滑动存在不足,沿弱层(3)~(6)滑动存在富余;自上而下进行边坡角度优化,提出陡帮开采,提高煤炭回收率。
In order to explore the deformation and failure mechanism of multi weak layer slope,taking the north slope of an open-pit mine as an example,comprehensively analyze the previous exploration data and research results,determine the recommended value of physical and mechanical indexes of rock and soil mass,and establish a typical engineering geological model section. The slope stability is optimized by using the slope stability mechanism and the finite element method. The results show that the failure mode of multi slope is mainly“sitting sliding”sliding along the weak layer,which is easy to show multi sliding body sliding,and the weak layer is the main control layer of failure. The designed slope stability is insufficient in sliding along the weak layer(1) and(2),and there is surplus in sliding along the weak layer(3)~(6). The slope angle is optimized from top to bottom,and the steep slope mining is proposed to improve the coal recovery rate.
作者
常剑
侯成恒
赵旭
CHANG Jian;HOU Chengheng;ZHAO Xu(China Coal Technology&Engineering Group Shenyang Research Institute;State Key Laboratory of Coal Mine Safety Technology;Zhalute Banner Zhahanao'er Coal Co.,Ltd.)
出处
《现代矿业》
CAS
2022年第5期81-84,共4页
Modern Mining
关键词
多弱层边坡
破坏机理
边坡稳定
边坡形态
multi weak layer slope
failure mechanism
slope stability
slope shape
