哈尔乌素露天矿北端帮保护台阶开采安全评价
Safety Evaluation of Protective Bench in Northern End Slope of Haerwusu Open-Pit Coal Mine
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摘要: 为了评价哈尔乌素北端帮保护台阶的安全性，对地质资料进行分析，确定了北端帮断层的产状信息。按照北帮保护台阶的几何结构和地质构造建立了边坡建模并进行稳定性分析，结果表明：北端帮二维稳定系数为1.452（考虑震动影响为1.262），三维稳定系数为1.75；保护台阶开采后，北端帮边坡角度由34°提高到36°，稳定系数降低为1.413（考虑震动影响为1.221），三维稳定系数降低为1.63，满足中长期的安全储备系数要求。通过清理浮石、挂网喷浆、拦石挡墙、拦石网等措施可以有效的消除或阻挡危险源，采用排水、控制爆破等方式可以减小危险源的形成,确保保护台阶开采过程中的人员、设备安全。Abstract: In order to evaluate safety of protective bench in north end slope of Haerwusu open-pit Coal Mine, the basic information of the fault in northern end slope is determined according to the analysis of geological survey and data. According to the geometric and geological structure of protective bench in north end slope of Haerwusu open-pit Coal Mine, the stability of the slope is analyzed by numerical simulation and the result shows that the coefficient of stability with two-dimensional modeling is 1.452 (the coefficient is 1.262, considering the influence of vibration), and the coefficient of stability with three-dimensional modeling is 1.75; after mining the protective bench, the angle of north end slope increases from 34 degrees to 36 degrees, the coefficient of stability reduces to 1.413 (the coefficient of stability is 1.221, considering the influence of vibration), the coefficient of stability with three-dimensional modeling reduces to 1.63, which meets the safe requirements for the long-term. The dangerous sources can be controlled and eliminated by clearing the pumice, hanging nets, blocking stone and retaining walls and stone netting. In addition, controlling blasting and drainage can reduce the formation of dangerous sources and ensure the safety of people and equipment during mining the protective bench.
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Keywords:
- open-pit /
- end slope /
- fault /
- slope stability /
- protective measures
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