摘要
为达到提高露天煤矿顺倾软岩边坡稳定性的目的,结合白音华二号露天煤矿非工作帮为典型顺倾软岩边坡的工程实际情况,采用岩土工程数值模拟软件FLAC^(3D),揭示边坡稳定性的形态效应与尺寸效应;建立了临界坡角与弱层暴露临界长度之间的关系曲线,最终设计了有利于稳定的白音华二号露天煤矿非工作帮边坡空间几何形态。研究结果表明:通过合理控制弱层的暴露长度以及开挖坡角等关键指标,可有效提高露天矿边坡的稳定性,最终确定的白音华二号露天煤矿非工作帮开挖坡角为45°,此时坑底弱层的临界暴露长度约为176 m,边坡即可满足安全要求。
In order to improve the stability of open-pit soft rock slopes in open-pit coal mines,based on the actual engineering situation of the non working slope in Baiyinhua No.2 Open-pit Coal Mine as a typical inclined soft rock slope,the geotechnical engineering numerical simulation software FLAC^(3D) was used to reveal the morphological and dimensional effects of slope stability,establish the relationship curve between the critical slope angle and the critical length of weak layer exposure,and ultimately design the spatial geometry of non-working slopes in favor of the stabilization of Baiyinhua No.2 Open-pit Coal Mines.The results of the study show that the stability of the open-pit mine slope can be effectively improved by reasonably controlling the exposure length of the weak layer and the key indexes such as the excavation slope angle,and the finalization of the excavation slope angle of the non-working slope of Baiyinhua No.2 Open-pit Coal Mine is 45°,and at this time,the critical length of the weak layer exposed at the bottom of the pit is about 176 m,so that the slope can satisfy the safety requirements.
作者
李思维
周亚森
LI Siwei;ZHOU Yasen(National Energy Xinjiang Hongshaquan Energy Co.,Ltd.,Urumqi 830000,China;Liaoning Technical University,Fuxin 123000,China)
出处
《露天采矿技术》
CAS
2024年第1期52-56,共5页
Opencast Mining Technology
关键词
顺倾软岩边坡
数值模拟
滑移模式
开挖坡角
弱层暴露长度
down-dip soft rock slope
numerical simulation
slip model
slope angle of excavation
exposed length of weak layer
