青海省五龙沟矿区坑道钻探硐室围岩稳定性分析

Analysis on Surrounding Rocks Stability of Tunnel Drilling in Wulonggou Mine of Qinghai Province

摘要:

以青海省都兰县五龙沟整装勘查矿区黑石沟矿段48线HSNCM48-1钻孔为例，应用FLAC3D数值模拟软件模拟硐室开挖变形情况，根据模拟结果确定支护措施和监控点位置。对硐室开挖支护前后竖向位移、水平位移、总位移和塑性区的数值模拟结果进行对比分析；对监控点开挖支护前后用多点位移计测量位移的真实值和用FLAC3D数值模拟软件计算的模拟值分别进行对比分析。通过计算对比分析可以得到，运用数值模拟软件模拟的硐室围岩变形情况，对分析硐室的位移场、确定支护措施等具有十分重要的指导意义。

Abstract:

Take borehole HSNCM48-1 as an example, which was at Line 48 of Heishigou ore section of equipped exploration mining area in Dulan County of Qinghai Province, FLAC3D numerical simulation software was applied to simulate the deformation of tunnel excavation; and according to the simulation results, the support measures and monitoring points were determined. Comparative analysis was made on the numerical simulation results of vertical displacement, horizontal displacement, the total displacement and plastic zone before chamber excavation supporting, and on the real values by multi-point displacement meter before and after monitoring points excavation supporting as well as the simulation values calculated by FLAC3D simulation software respectively. By the comparative analysis on the calculation results, the deformation of chamber surrounding rocks simulated by numerical simulation software can be obtained, which is very important for the displacement field analysis and the supporting measures determination.