近距离煤层开采煤岩孔隙率演化规律与采空区空隙率模型研究  

Study on the the porosity evolution law of coal and rock and the void fraction model of goaf in close-distance coal seam mining

作　　者：麻方成 MA Fangcheng(Shanxi Shouyang Luyang Xiangsheng Coal Industry Co.,Ltd.,Shanxi Shouyang,045400)

机构地区：[1]山西寿阳潞阳祥升煤业有限公司,山西寿阳045400

出　　处：《煤矿现代化》2025年第3期104-107,共4页Coal Mine Modernization

摘　　要：为保障近距离煤层群高瓦斯矿井安全生产,需掌握煤层开采后煤岩孔隙率演化规律和采空区空隙率分布模型以便为矿井瓦斯抽采提供理论依据。本文以祥升煤矿3号和6号煤层为研究背景,采用数值模拟软件,模拟分析了2个煤层下行开采后煤岩的孔隙率演化规律,探究了6号煤层采空区空隙率分布模型。结果表明,3号煤层煤岩孔隙率发生明显变化的区域主要分布在垮落带,6号煤层煤岩孔隙率先变大再变小;6号煤层采空区底板走向、倾向和高度3个方向的空隙率分布呈指数函数关系。In order to ensure the safe production of high-gas mines with close coal seams,it is necessary to master the evolution law of porosity of coal and rock and the void fraction model of goaf after coal seam mining in order to provide theoretical basis for mine gas drainage.In this paper,taking the NO.3 and No.6 coal seam in Xiangsheng Coal Mine as the research background,numerical simulation software is used to simulate and analyze the porosity evolution law of coal and rock after downward mining of NO.3 and No.6 coal seam,and the void fraction model of No.6 coal seam goaf is explored.The results show that the areas where the porosity of coal and rock in NO.3 coal seam changes obviously are mainly distributed in the caving zone,and the porosity of coal and rock in No.6 coal seam first increases and then decreases.The void fraction distribution in the direction of strike,dip and height of the floor in goaf of No.6 coal seam is exponential function.

关 键 词：近距离煤层 煤岩孔隙率 采空区空隙率 数值模拟 

分 类 号：TD325[矿业工程—矿井建设] TD712.52