基于全局临界滑移场技术的抚顺西露天矿边坡稳定性研究
Research on slope stability of Fushun West Open-pit Mine based on global critical slip field technology
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摘要: 基于全局临界滑移场原理，应用Ordinary、Bishop、Janbu、Morgenstern-price 4种评价方法，建立边坡稳定全局精细化评价体系，并将该评价体系应用于西露天矿内排压脚前后的边坡稳定性综合评价中，经过综合对比确定西露天矿最不稳定边坡，采取回填压脚技术进行处理后再次进行评价。评价结果表明：实施回填压脚大幅度有效地控制了边坡变形，使其稳定性系数提高了1.4倍；根据西露天矿实际监测资料表明，该评价结果安全可靠与实际情况吻合良好；与单一的评价方法相比，该评价体系能够考虑边坡稳定性评价中诸多因素不确定性问题，通过对比4种评价方法，选取最合理最符合实际工程需要的一种方法。Abstract: Based on the principle of global critical slip field, this paper applies four evaluation methods of Ordinary, Bishop, Janbu and Morgenstern-price to establish a global and refined evaluation system for slope stability. The evaluation system was applied to the comprehensive evaluation of the slope stability before and after the presser foot discharge in the West Open-pit Mine. After a comprehensive comparison, the most unstable slope of the West Open-pit Mine was determined, and the backfill presser foot technology was used for treatment and then evaluated again. The evaluation results show that the implementation of the backfill presser foot has greatly and effectively controlled the slope deformation and increased its stability coefficient by 1.4 times. According to the actual monitoring data of the West Open-pit Mine, the evaluation results are safe and reliable and are in good agreement with the actual situation. Compared with a single evaluation method, this evaluation system can consider the uncertainty of many factors in the evaluation of slope stability. By comparing the four evaluation methods, the most reasonable and most suitable method for actual engineering needs is selected to improve the slope stability.
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