摘要
露天矿山因其独特的开采方式,形成各种高陡边坡,威胁生产安全。尽管已有许多关于边坡形态对稳定性影响的研究,但地下水作用导致的坡体内应力变化仍可能引发边坡失稳和矿山滑坡。因此,研究地下水作用下边坡形态对露天矿山稳定性的影响尤为重要。文章基于FLAC3D手册中的模型,利用FLAC3D软件和Mohr-Coulomb准则,分析了地下水作用下不同坡度、坡高和台阶长度对复合形态边坡稳定性的影响。结果表明,地下水作用下边坡稳定系数更低,可能的滑动范围更大,并且凹坡部分的稳定性优于直坡。在此基础上,进一步探究了凹坡形态与其稳定性之间的关系:随坡度、坡高和台阶长度增大,三者与稳定系数的关系曲线呈现先减小后趋于稳定的趋势。该研究可为露天矿山的开采设计、综合治理等提供理论支持,对实现露天开采的经济合理性,确保矿山的长期稳定和可持续发展具有指导意义。
Due to their unique mining methods,open-pit mines often form various steep slopes,posing a threat to production safety.Although there has been extensive research on the impact of slope shape on stability,changes in internal stress caused by groundwater can still lead to slope instability and mine landslides.Therefore,studying the effect of groundwater on slope shape and its impact on the stability of open-pit mines is crucial.This paper uses models from the FLAC 3D manual,applying FLAC 3D software and the Mohr-Coulomb criterion,to analyze the impact of different slopes,heights,and step lengths on the stability of composite slope under the influence of groundwater.The results show that the slope stability coefficient under groundwater action is lower,the possible sliding range is larger,and the stability of concave slope portion is better than that of straight slope.On this basis,the relationship between concave slope shape and its stability was further investigated:with the increase of slope,slope height and step length,the relationship curves between the three and the stability coefficient showed a tendency of decreasing and then stabilizing.The research on the influence of slope shape on the stability of open-pit mines under the action of groundwater can provide theoretical support for the mining design and comprehensive management of open-pit mines,which is of guiding significance for realizing the economic rationality of open-pit mining and ensuring the long-term stability and sustainable development of the mines.
作者
张淼
周爱红
袁颖
曹思源
张文松
ZHANG Miao;ZHOU Aihong;YUAN Ying;CAO Siyuan;ZHANG Wensong(Hebei GEO University,Shijiazhuang 050031,China;Hebei Technology Innovation Center for Intelligent Development and Control of Underground Built Environment,Shijiazhuang 050031,China)
出处
《河北地质大学学报》
2024年第5期59-69,共11页
Journal of Hebei Geo University
基金
河北省教育厅青年拔尖项目(BJK2024090)
河北地质大学科技创新团队项目(KJCXTD-2021-08)。
关键词
露天矿山
稳定性
边坡形态
地下水作用
强度折减法
open-pit mines
stability
slope shape
the action of groundwater
strength reduction method
