高瓦斯薄煤层采动裂隙演化规律及瓦斯抽采技术

Mining-induced Fractures Evolution Rule and Gas Drainage Technology in High Gas and Thin Coal Seam

针对鸡西矿区某矿薄煤层工作面瓦斯涌出量大,现有风排措施难以控制,需采用抽采措施减小瓦斯量的问题。运用理论计算及数值模拟分析了顶板采动裂隙的发育规律,发现薄煤层工作面顶板环形裂隙圈的宽度较小,且不能使上部亚关键层破断,使得亚关键层及以上岩层中不能发育贯通裂隙富集瓦斯。因此应将抽采工程布置在亚关键层下的裂隙带内,根据分析进行了抽采工程设计并取得了良好的应用效果。

Due to the high gas emission, in order to solve the problem of the existing wind measures is difficult to control and extraction of measures to reduce the gas quantity problem. Ruse the oretical calculation and numerical simulation to analyze the development regularity of roof mining fissure and found that the width of annular thin coal seam working face roof fissure is smaller and can′t make the upper part and the key layer breaking, above makes the key stratum and rock in the enrichment of transfixion crack gas can′ t development. Therefore extraction project layout should be under the key stratum fissure zone, and according to the analysis of the extraction from engineering design and achieved good application effect.