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为了保证灵泉露天煤矿残煤回采时边坡安全,对其边坡稳定性进行了分析与评价。根据灵泉露天煤矿东帮边坡各剖面实际揭露分层物料各自物理力学性质,应用边坡数值计算软件计算模拟灵泉露天煤矿东帮边坡的稳定性。结果表明,东帮最终帮坡边坡角为32°～35°,能够保证残煤回采时边坡的安全性。同时,对影响灵泉露天煤矿东帮边坡稳定性的主要因素进行了分析评价。结果表明,粉砂岩容易吸水,但含水率的增加对C、φ值的影响幅度小于泥岩,泥岩不易吸水,亦不易排水,但含水率对泥岩的影响幅度大。因此,在采矿过程中应加强露天矿疏干排水工作,以使边坡岩体保持较高强度,从而保证边坡安全。
In order to ensure the slope safety when the residual coal mining in Lingquan opencast coal mine is mining, the slope stability is analyzed and evaluated. According to the actual physical and mechanical properties of stratified materials in each section of the east slope of Lingquan opencast coal mine, the stability of the east slope of Lingquan opencast coal mine is simulated and calculated by using the slope numerical calculation software. The results show that the ultimate slope slope of the east slope is 32 ° ~ 35 °, which can ensure the safety of slope when residual coal mining. At the same time, the main factors that affect the stability of the east slope of Lingquan opencast coal mine are analyzed and appraised. The results show that the siltstone is easy to absorb water, but the increase of moisture content has less influence on C and φ than that of mudstone. The mudstone is not easy to absorb water and easy to drain water. However, the influence of water content on mudstone is large. Therefore, during the mining process, the drainage and drainage work of open-pit mines should be strengthened in order to maintain the high strength of the slope rock mass so as to ensure the slope safety.