近距离煤层遗留煤柱下掘进巷道围岩控制技术研究OA
Research on surrounding rock control technology for mining roadway under residual coal pillars in close distance coal seams
针对南阳坡煤矿近距离煤层遗留煤柱下24202回风巷在掘进期间围岩控制难的问题,通过FLAC3D数值模拟软件,对其开挖后垂直应力分布、塑性区扩展形态进行了分析,顶板最大破坏深度3.5m,两帮为1.5m.根据数值模拟结果及工程实际情况,设计采用高强预应力长短锚杆(索)协同承载支护方案,在观测周期50d内,24202回风巷两帮最大移近量控制在87mm,顶底板最大移近量为92mm,有效防止了巷道冒顶、片帮等灾害,为同类型地质条件下巷道围岩控制提供了思路.
In response to the difficulty in controlling the surrounding rock of No.24202 return air roadway under the residual coal pillar in the close distance coal seam of Nanyangpo Mine during excavation,the vertical stress distribution and plastic zone expansion morphology after excavation were analyzed using FLAC3D numerical simulation software.The maximum depth of roof failure was 3.5 meters,and the two sides were 1.5 meters.Based on numerical simulation results …查看全部>>
王志根
中煤华昱南阳坡煤业有限公司,山西朔州 036999
矿山工程
近距离煤层遗留煤柱数值模拟围岩控制
close distance coal seamsresidual coal pillarnumerical simulationsurrounding rock control
《煤炭与化工》 2024 (6)
28-31,4
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