开采不同覆岩结构煤层的数值模拟

Numerical Simulation of Mining Different Structural Coal Seam in Overlying Rock

利用FLAC3D数值模拟软件,以补连塔煤矿近水平煤层为背景,对不同结构介质条件下的现代煤炭开采分别进行数值试验。结果表明:在同样强度的开采下,坚硬覆岩具有较强的抗扰动能力,工作面安全开采及地表受到的影响相对较小,而软弱覆岩抗扰动能力较弱,工作面溃沙、透水事故较容易发生,工作面安全开采及地表受到的影响相对较大;并且坚硬岩层离工作面较近时,覆岩受开采扰动影响较大。

Based on the condition of the nearly flat coal seam of Bulianta Coal Mine, the results from numerical tests of modern coal mining under different structural medium with the numerical simulation program FLAC3D, show that under the mining of the same intensity, hard cover rocks have stronger ability to resist deformation, so the influence of the working face safety mining and the surface is relatively weaker; whereas, flexible cover rocks have weaker ability to resist deformation; the sand inrush and water inrush in the working face occur easily; the influence of the working face safety mining and the surface is relatively stronger; when hard cover rocks are nearer from the working face, coal mining has larger influence on cover rocks.