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通过分析黄陵二矿2煤层地质条件,在获取力学参数的基础上,以203工作面开采为工程背景,利用FLAC~(3D)模拟软件,结合软件本身内嵌的FISH语言操作指控,对黄陵二矿203工作面底板进行数值模拟。结果表明:随着回采工作面的不断推进,回采工作面两端的煤壁处出现应力集中现象,应力集中系数最大达2.16。底板变形随着距离底板深度的增加而逐渐降低,最大变形量达2.1 m;煤层底板最大破坏深度位于回采面两端位置处为21 m,与经验公式对比误差在0.8%~2%之间,且与203瓦斯异常涌出点垂深位置相吻合,说明模拟结果相对真实可靠。
Based on the analysis of the geological conditions of seam # 2 in Huangling No.2 Mine, based on the acquisition of mechanical parameters, taking 203 face mining as the engineering background, using FLAC ~ (3D) simulation software and FISH language manipulation algebra embedded in the software itself, Tailing 203 mining face floor for numerical simulation. The results show that with the continuous promotion of mining face, the stress concentration phenomenon occurs at the coal wall at the two ends of mining face, the maximum stress concentration coefficient reaches 2.16. The deformation of the floor gradually decreases with the increase of floor depth, and the maximum deformation reaches 2.1 m. The maximum depth of destructive coal seam floor is 21 m at both ends of the mining face, which is 0.8% -2% compared with the empirical formula. And coincides with the plunge position of 203 gas anomalous emission points, indicating that the simulation results are relatively real and reliable.