采空区充水对边坡稳定性影响的研究  

Research on the influence of water filling in goaf on the slope stability

作　　者：樊赟赟[1] 董志圣 张放 Fan Yunyun;Dong Zhisheng;Zhang Fang(School of Resource and Civil Engineering,Northeastern University;Shenyang Branch of Lanzhou Engineering&Research Institute of Nonferrous Metallurgy Co.,Ltd.)

机构地区：[1]东北大学资源与土木工程学院,110004 [2]兰州有色冶金设计研究院有限公司沈阳分公司

出　　处：《黄金》2022年第11期31-35,共5页Gold

基　　金：中央高校基本科研业务专项资金项目(N2201021);国家科技支撑计划重点项目(2016YFC0801603,2017YFC1503101);国家自然科学基金资助项目(41201007);辽宁省重点科技项目(2019JH2-10100035);辽宁省教育厅科学研究一般项目(L2013103)。

摘　　要：采空区的存在是影响露天边坡稳定和矿山安全开采的重要因素。在矿山开采中,采空区可能处于充水状态,而采空区的充水状态则可能会对露天边坡的稳定性造成影响。以某包含充水采空区露天边坡为背景,通过数值计算分析采空区的存在及不同充水状态对露天边坡稳定性的影响。研究结果表明:采空区的存在可能会影响露天边坡的局部渗流场,使采空区周围产生应力集中现象,进而改变潜在的滑移面,并降低边坡的稳定性。而采空区内充水会导致局部高水头的产生,并使采空区周围的应力更加集中,进而使边坡的位移增大,边坡稳定性降低。随着采空区充水程度的增加,边坡安全系数降低,采空区对边坡稳定性的影响也更加显著。The goaf is an important factor affecting the slope stability of open-pit mines and safe mining.In mining, the goaf may be in the water-filling state, which may affect the stability of the open-pit slope.Therefore, taking the slope of an open-pit mine with water-filling goaf as the research background, this study analyzes the influence of the goaf presence and different water-filling states on slope stability through numerical calculation.The results show that the presence of the goaf may affect the local seepage field of the open-pit slope, causing stress concentration around the goaf, thereby changing the potential sliding surface and reducing the slope stability.The water filling in the goaf may lead to the generation of a local high water head, and make the stress around the goaf more concentrated so that the displacement of the slope is increased and the slope stability is reduced.With the increase of water filling degree in goaf, the safety coefficient of the slope decreases, and the influence of the goaf on the slope stability is more significant.

关 键 词：露天开采 采空区 充水程度 边坡 稳定性 数值模拟 

分 类 号：TD854.6[矿业工程—金属矿开采]