贺斯格乌拉露天煤矿排土场稳定性分析与治理  

Stability Analysis and Treatment of Dumping Site in Hesigewula Open-pit Mine

作　　者：张涛江 常来山 李绍臣 Zhang Taojiang;Chang Laishan;Li Shaochen(School of Civil Engineering,University and Technology Liaoning;School of Mining Engineering,University and Technology Liaoning;Beijing Zhongkuang Xinshi Coal Science and Technology Research Institute)

机构地区：[1]辽宁科技大学土木工程学院 [2]辽宁科技大学矿业工程学院 [3]北京中矿信实煤炭科学技术研究院

出　　处：《现代矿业》2019年第7期231-233,243,共4页Modern Mining

摘　　要：排土场边坡稳定是确保露天矿安全高效生产的前提条件。为确定贺斯格乌拉露天矿北排土场的滑坡模式,基于摩尔-库伦强度准则与折减理论,运用FLAC有限差分模拟与极限平衡分析技术,对贺斯格乌拉露天矿北排土场进行了模拟分析与研究,确定了沿基底软弱层滑动的滑坡模式。研究分析结果表明,贺斯格乌拉露天矿北排土场BP-1剖面位置塑性区已全部贯通,边坡处于失稳状态,基底弱层附近产生的应力集中是边坡发生顺层剪切破坏的主要因素。通过分析北排土场建设情况、经济因素及环境条件,对北排土场边坡滑坡采取排土压脚综合治理措施,治理后的边坡稳定性系数为1.214,使边坡达到了稳定状态,为同类滑坡灾害治理提供了可靠性依据。The stability of the dump slope is a prerequisite for ensuring safe and efficient production of open pit mines.In order to determine the landslide mode of the dumping site in the north dumping site of the Hesigewula open-pit mine,based on the Mohr-Coulomb strength criterion and the reduction theory,the FLAC finite difference simulation and limit equilibrium analysis techniques are used to the north row of the Hesigewula open-pit mine.The soil field dumping site was simulated and studied,and the landslide pattern along the weak layer of the basement was determined.The results of the research indicated that the plastic zone of the BP-1 section in the northern dumping site of the Hesigewula Open-pit Mine has been completely penetrated,and the slope is in an unstable state.The stress concentration near the weak layer of the basement is the main factor for the bedding shear failure of the slope.By analyzing the construction situation,economic factors and environmental conditions of the northern dumping site,the comprehensive control measures of the soil compacting foot are adopted for the slope of the northern dumping site.The stability coefficient of the slope after the treatment is 1.214,which makes the slope reach a stable state.It provides a reliable basis for the treatment of similar landslide hazards.

关 键 词：排土场 边坡稳定性 FLAC 边坡治理 

分 类 号：TD824.8[矿业工程—煤矿开采]