哈尔乌素露天煤矿内排土场增高扩容可行性分析  

Feasibility analysis of height increase and capacity expansion of inner dump in Haerwusu Open-pit Coal Mine

作　　者：张禹 黄浩轩 ZHANG Yu;HUANG Haoxuan(Haerwusu Open-pit Coal Mine,China Energy Zhunneng Group,Ordos,Inner Mongolia 010300,China;CCTEG Shenyang Engineering Company,Shenyang,Liaoning 110015,China)

机构地区：[1]国能准能集团哈尔乌素露天煤矿,内蒙古自治区鄂尔多斯市010300 [2]中煤科工集团沈阳设计研究院有限公司,辽宁省沈阳市110015

出　　处：《中国煤炭》2024年第7期70-76,共7页China Coal

摘　　要：为减轻哈尔乌素露天煤矿外排土场用地压力,利用无人机倾斜摄影构建三维模型,并采用三维数值模拟软件FLAC^(3D)与极限平衡法,对比分析露天煤矿内排土场增高前后典型截面的边坡稳定性,进一步分析在自重和暴雨工况下内排土场增高扩容可行性。结果表明:内排土场增高对三维场地的整体竖向变形影响不大,而针对增高位置的局部沉降而言,排土场增高造成的影响深度主要在原高度以下40 m以内;增高后在高程1160 m位置出现地面隆起,与边坡稳定滑弧位置基本一致;在高程内排土场安全系数随着扩容高度的增大呈非线性减小,暴雨工况整体规律与自重工况基本一致,安全系数整体降低约19%;根据规范要求,最终确定哈尔乌素露天煤矿内排土场可增高至+1320 m,其最小安全系数在自重工况下为1.624,暴雨工况下为1.313。In order to reduce the pressure of land use in the external dump of Haerwusu Open-pit Coal Mine,a three-dimensional model was constructed by using UAV tilt photography,and the slope stability of typical sections before and after increasing the height of the inner dump in the open-pit mine was compared and analyzed by three-dimensional numerical simulation software FLAC^(3D)and limit equilibrium method,and the feasibility of height increase and capacity expansion of inner dump under dead weight and rainstorm conditions was further analyzed.The results showed that the height increase of the inner dump had little effect on the overall vertical deformation of the three-dimensional site,and for the local settlement of the increased position,the influence depth caused by the height increase of the inner dump was mainly within 40 m below the original height;after the height increase,the ground uplift appeared at the elevation of 1160 m,which was basically consistent with the stable sliding arc position of the slope.The safety factor of the inner dump in the elevation decreased nonlinearly with the increase of the capacity expansion height,and the overall law under the rainstorm condition was basically consistent with that of the dead weight condition,and the safety factor was reduced by about 19%.According to the requirements of the specifications,it was finally determined that the inner dump height of Haerwusu Open-pit Coal Mine can be increased to+1320 m,and its minimum safety factors were 1.624 under dead weight condition and 1.313 under rainstorm condition.

关 键 词：露天煤矿 FLAC^(3D) 排土场 边坡稳定性 数值模拟 

分 类 号：TD8248[矿业工程—煤矿开采] S157.2[矿业工程—矿山开采]