新疆白砾滩露天煤矿边坡稳定性研究

Slope Stability Study on Xinjiang Bailitan Open Pit Coal Mine

最终边坡角是煤炭资源转换为储量的重要因素,其确定依赖于边坡稳定性分析和评价。为了满足香港联交所的上市要求,白砾滩露天煤矿开展了数据采集、岩石力学试验和分析计算等一系列边坡稳定性研究工作。研究确定了潜在的滑坡模式为沿炭质泥岩弱层顺层剪出同时切断上覆岩层的"半圆弧-直线"型滑坡,并根据极限平衡法分析结果提出高度小于280 m的边坡采用36°的最终边坡角,高度大于280 m的边坡采用32°~34°的最终边坡角。

Overall slope angle（OSA） is a key factor for the conversion of coal resources into reserves. The determination of OSA depends on slope stability analysis. In order to meet the listing requirements of HKEX, a series of slope stability study tasks,including data collection, rock testing and numerical analysis, were carried out for Bailitan Surface Coal Mine. The study has determined that the potential landslide pattern is to cut off the ＂semicircle-linear＂type of landslide that cuts the overlying rock strata along the weak layer of the carbonaceous mudstone. Based on results of limit equilibrium analysis, it is proposed that overall slope angle of 36 ° is for the height less than 280 m and the overall slope angle from 32°to 34°is for the height more than 280 m.