考虑块石块度及分布的人工土石混合边坡稳定性分析  

Stability Analysis of Artificial Soil-rock Mixed Slope Considering Block Size and Distribution

作　　者：李志辉 杨小彬[1] 原文杰 吕祥锋 刘腾辉 赵余廷 张泽文 肖德升 LI Zhihui;YANG Xiaobin;YUAN Wenjie;LÜXiangfeng;LIU Tenghui;ZHAO Yuting;ZHANG Zewen;XIAO Desheng(School of Emergency Management and Safety Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Pingshuo Industrial Group Co.,Ltd.,Shuozhou 038308,China;School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)应急管理与安全工程学院,北京100083 [2]平朔工业集团有限责任公司,山西朔州038308 [3]北京科技大学土木与资源工程学院,北京100083

出　　处：《金属矿山》2023年第9期76-82,共7页Metal Mine

基　　金：国家自然科学基金面上项目(编号:51774048);高等学校专项基金项目(编号:2021YJSAQ03)。

摘　　要：为研究人工土石混合边坡中块石块度及空间分布对边坡稳定性的影响,用Python语言编写脚本生成不同块石块度、块石间距、块石轮廓等参数构成土石混合边坡模型,实现土石混合边坡块石块度及分布的随机生成。将模型导入Abaqus软件中生成土石混合边坡的数值计算模型,对土石混合边坡的稳定性进行计算,得到了块石的不同块度大小及不同空间分布对土石混合边坡稳定性的影响规律。研究表明:在含石量相同、块石块度范围为10~50 cm的条件下,随着块石块度增加,土石混合边坡的安全系数提升,塑性破坏带变宽、变长,边坡稳定性增加;当块度为10~20 cm与30~40 cm的块石分层分布在土石边坡中且块度大的块石邻近边坡下部时,安全系数较高,土石混合边坡的塑性破坏带分布面积广,边坡稳定性提升。研究结果可为人工土石混合边坡施工提供参考。In order to explore the influence of block size and distribution on slope stability in artificial soil-rock mixed slope,the different block sizes,block spacing,block profile and other parameters of the soil-rock mixed slope model are scripted in Python language,and realizing the random generation of block size and distribution of soil-rock mixed slope.The model is imported into ABAQUS software to generate the numerical calculation model of soil-rock mixed slope.The stability of the soil-rock mixed slope is calculated and the influence rule of rocks with different sizes and distribution conditions on the stability of soil-rock mixed slope is revealed using numerical simulation.The results show that under the condition of the same rock propor-tion and the block size range is 10~50 cm,the safety factor of the soil-rock mixed slope increases gradually with the increase of block size,the plastic failure zone becomes wider and longer,and the stability of soil-rock mixed slope increases.When 10~20 cm and 30~40 cm block stones exist in the soil-rock mixed slope at the same time,the closer the distribution of large-size rocks to the bottom,the higher the safety factor of the soil-rock mixed slope,the plastic failure zone of soil-rock mixed slope be-comes wider,and the slope stability increases.The research results can provide reference for the construction of artificial soil-rock mixed slope.

关 键 词：人工土石混合边坡 边坡稳定性 安全系数 塑性破坏带 

分 类 号：TD325[矿业工程—矿井建设]