摘要
基于离散元二维颗粒流程序(PFC^2D),以某矿区岩质边坡为研究对象,采用单轴压缩模拟试验对边坡各岩土层的细观力学参数进行标定,建立边坡的颗粒流模型,对边坡的运动过程及破坏机理进行分析。结果表明,边坡中部较破碎岩土层处首先发生剪切破坏,由于重力挤压作用,坡脚处岩土层挤压破坏滑出并在坡脚处堆积,坡顶失去底部土体支撑作用产生拉张裂缝后向下滑动,最终导致边坡整体失稳破坏。研究结果与实际边坡情况基本吻合,可为矿区安全开采及灾害防治提供参考。
Taking the rock slope in a mining area as the research object,the stability of the slope is analyzed by particle flow method(PFC^2D).Firstly,the micro-mechanical parameters of the rock and soil layers of the slope are calibrated by uniaxial compression simulation experiment.Then,the particle flow model of the slope is established,and the movement process and failure mechanism of the slope are analyzed.The results show that the shear failure occurs first in the middle of the slope where the rock and soil layers are relatively broken.Due to gravity compression,the rock and soil layers at slope foot slide out and accumulate at the foot of slope,and because the top of slope loses the support of bottom soil body,the slope tope results in tension cracks and slides downward,that eventually results the overall instability failure of the slope.The research results are basically consistent with the actual situation of slope,which can provide references for safe mining and disaster prevention in the mining area.
作者
何倩
薛喜成
HE Qian;XUE Xicheng(CUMT Geotechnical Engineering&New Technology Development Co.,Ltd.,Xuzhou 221000,Jiangsu,China;College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,Shaanxi,China)
出处
《水力发电》
北大核心
2020年第9期74-79,共6页
Water Power
基金
国家自然科学基金资助项目(41702298)
陕西省自然科学基础研究计划(2017JQ4020)
陕西省教育厅专项科研计划项目(17JK0515)。
