水浸基底排土场边坡破坏机理及预控技术研究

发布时间：2018-06-27 01:41

本文选题：水浸基底 + 排土场边坡　；参考：《中国矿业大学（北京）》2015年博士论文

【摘要】：阴湾排土场是黑岱沟露天煤矿的外排土场，受附近矿井排水影响，其南部大好赖沟沟底形成一面积约24万m2、总水量约161.53万m3的积水坑，直接影响其排弃空间，并威胁南部大准铁路线和排土场西部的安全。鉴于此，在分析总结该区域历年研究成果的基础上，采用钻探和地质调查等方法掌握该区域的工程地质和水文地质条件，通过室内试验以及工程类比方法确定了岩土体的物理力学参数，开展了水浸基底排土场破坏模式研究，采用相似模拟试验和FLAC3D等研究了水浸基底排土场边坡的破坏机理，并采用极限平衡方法进行了排土场的稳定性分析；结合工程地质和水文地质条件和排土工艺，依据能量守恒理论对抛石挤淤技术中的有效深度进行了计算，并利用PFC对抛石挤淤的过程进行了数值模拟，验证了抛石挤淤方案的合理性；在实施抛石挤淤技术的同时进行了GPS监测，位移监测结果表明，排土场边坡的变形在安全范围以内，排土场的安全得到了保障。
[Abstract]:The Yingwan dump is the outer dump of Heidaigou opencast coal mine. Affected by the drainage of nearby mines, the bottom of the Daholaigou in the south of the mine has formed a water pit with an area of about 240000 m2 and a total water volume of about 1.6153 million m3, which directly affects the drainage space. It also threatens the security of the southern quasi-railway lines and the west of the dump. In view of this, on the basis of analyzing and summarizing the research results of the region over the years, the engineering geology and hydrogeological conditions of the region are mastered by drilling and geological survey methods. The physical and mechanical parameters of rock and soil were determined by laboratory test and engineering analogy method, and the failure mode of flooded foundation dump was studied. The failure mechanism of the slope was studied by similar simulation test and FLAC3D. The stability of the dump is analyzed by using the limit equilibrium method, and the effective depth of the technique is calculated according to the energy conservation theory, combined with the engineering geology and hydrogeological conditions and the draining technology. A numerical simulation is carried out to verify the reasonableness of the scheme, and GPS monitoring is carried out at the same time, and the displacement monitoring results show that the displacement monitoring results are as follows: (1) using PFC to simulate the desilting process of riprap, the rationality of the scheme is verified, and the displacement monitoring results show that, The deformation of the dump slope is within the safe range, and the safety of the dump is guaranteed.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TD824.8

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