将军戈壁二号露天煤矿外排土场软弱基底坐落-牵移式滑坡机理

以新疆天池能源有限责任公司将军戈壁二号露天煤矿外排土场软弱基底为研究对象,通过对研究区岩土进行常规力学实验及流变试验,确定了该露天矿排土场基底及排弃物料物理力学指标。结合理论分析,确定排土场边坡滑坡模式为坐落-牵移式并对滑坡机理进行分析。建立排土场稳定性分析数值模拟模型,模拟排土场边坡变形破坏形式,计算分析了排土场边坡稳定性,结果表明,排土高度为120 m时,潜在的滑移面贯穿排土场内部及软弱基底层,边坡稳定系数略低于安全储备系数。

Mechanism of Located-shifted Landslide in Weak Basement of Jiangjun Gobi No.2 Open-pit Coal Mine

This paper takes the weak basement of the outside dump of Jiangjun Gobi No.2 Open-pit Coal Mine of Xinjiang Tianchi Energy Company as the research object. Through the routine mechanical experiment and rheological test of the geotechnical soil in the study area, the physical and mechanical indexes of the basement and the abandoned material of the open pit mine are determined. Combined with theoretical analysis, it is determined that the slope landslide mode of the dump is located-shifted and the landslide mechanism is analyzed. The numerical simulation model of the stability analysis of the dump is established, and the deformation and failure modes of the dump slope are simulated. The stability of the dump slope is calculated and analyzed. When the drainage height is 120 m, the potential slip surface penetrates the interior of the dump and the weak basement, and the slope stability coefficient is slightly lower than the safety reserve coefficient.