露天矿不同弱层置换参数下的边坡稳定性研究
Study on slope stability under different weak layer replacement parameters in open-pit mine
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摘要: 提高边坡稳定性是保障露天煤矿安全作业，提高资源回收率的重要途径。通过毕肖普分析法，开展了置换层边坡稳定系数表达式的推导，结合Geo-Slope数值模拟对推导公式的验证，分析了置换层深度与高度对边坡稳定性系数的影响。研究表明：置换层与滑移面没有接触前和接触部分不变后，置换深度对边坡稳定性系数影响不明显，置换深度支持置换层与滑移面有接触时，边坡稳定性系数增大；置换层与滑移面无接触前，置换高度对边坡稳定性系数影响不明显，置换层与滑移面存在接触后，置换高度与边坡稳定性系数大小呈正相关。Abstract: Improving slope stability is one of the important ways to ensure the safe operation of open pit coal mines and improve the resource recovery rate. Through Bishop’s analysis, the derivation of the expression of slope stability coefficient of replacement layer was carried out, and the influence of depth and height of replacement layer on slope stability coefficient was analyzed by combining Geo-Slope numerical simulation to verify the derivation. The study shows that: the influence of the replacement depth on the slope stability coefficient is not obvious before the contact between the replacement layer and the slip surface and after the contact part is unchanged, and the slope stability coefficient increases when the replacement depth supports the contact between the replacement layer and the slip surface; the influence of the replacement height on the slope stability coefficient is not obvious before the contact between the replacement layer and the slip surface before the contact between the replacement layer and the slip surface, the effect of the replacement height on the slope stability coefficient is not obvious, and after the contact between the replacement layer and the slip surface exists, the replacement height and the slope stability coefficient are positively related.
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Keywords:
- open pit mine /
- slope engineering /
- replacement layer /
- slope stability /
- simplified Bishop method
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