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中文摘要: 龙首矿西二采区计划在1 595 m水平开展无底柱分段崩落法工业试验，并已完成了试验采场的部分采切工程，回采进路的稳定性将直接影响到该采矿方法的试验效果。分析进路围岩松动圈的分布规律并对其实际范围进行测定，对于设计和优化进路的支护方式、支护参数有着重要的指导意义。本文采用不连续变形分析（DDA）方法对西二采区崩落法试验采场回采进路围岩松动圈分布规律进行了模拟研究，模拟结果表明在西二采区地质条件下，回采进路顶部的围岩松动圈范围要大于进路两帮松动圈范围。在此基础上，利用RSM-SY5型超声仪对回采进路松动圈范围进行了声波测试，测试结果表明1 595 m水平回采进路的松动圈范围大约在1.3~1.8 m，且进路顶部的松动圈实测范围要大于进路两帮松动圈实测范围。数值模拟研究及现场测试的结果为矿山巷道支护设计及优化提供了参考依据。
Abstract:The industrial test of the sublevel caving method was planned to be carried out at the level of 1595m in West No.2 mining area of Longshou Mine, and the partial mining engineering has been completed. The stability of the production drift will directly affect the test result of the mining method. It is of great significance for designing and optimizing the supporting methods and parameters of the production drift to analysis the distribution regularities of surrounding rock loose zone and measure its range. In this paper, discontinuous deformation analysis (DDA) method was used to simulate the distribution regularities of surrounding rock loose zone of production drift in experiment stope with sublevel caving mining method. Simulation results indicated that under the geological conditions in West No.2 mining area, the range of surrounding rock loose zone on the top of the production drift was wider than that of on the both sides of the drift. On this basis, the range of the loose circle in the stope was tested by RSM-SY5 ultrasonic instrument, the test results showed that the range of loose circle at 1595m stope was between 1.3 m and 1.8 m, which was consistent with previous simulation results. The results of numerical simulation and field test can provide reference for mine tunnel support design and optimization.
keywords: sublevel caving mining method production drift surrounding rock loose zone ultrasonic testing DDA simulation
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李宏业1,苏华友2,范永亮1,雷国荣2,尹幸乐2.龙首矿西二采区回采巷道围岩松动圈现场测试分析研究[J].有色金属（矿山部分）,2019,71(5):47-52.
LI Hongye1,,SU Huayou2,,FAN Yongliang1,,LEI Guorong2,,YIN Xingle2.Analytical investigation and field test of surrounding rock loose zone of production drift in West No.2 mining area of Longshou Mine[J].NONFERROUS METALS(Mining Section),2019,71(5):47-52.
李宏业1,苏华友2,范永亮1,雷国荣2,尹幸乐2.龙首矿西二采区回采巷道围岩松动圈现场测试分析研究[J].有色金属（矿山部分）,2019,71(5):47-52.
LI Hongye1,,SU Huayou2,,FAN Yongliang1,,LEI Guorong2,,YIN Xingle2.Analytical investigation and field test of surrounding rock loose zone of production drift in West No.2 mining area of Longshou Mine[J].NONFERROUS METALS(Mining Section),2019,71(5):47-52.
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