【摘要】 为了研究煤层瓦斯运移规律,确保矿井的安全生产,采用FLAC和Fluent数值模拟相结合的方法,分析了多孔介质瓦斯运移特征,研究了回采工作面瓦斯来源,主要由开采层瓦斯涌出和邻近层瓦斯涌出2部分组成,得到了煤层初始瓦斯含量与残存量的关系以及回采工作面瓦斯涌出量预测结果,模拟分析了不同钻孔直径下的周围煤体塑性区分布以及不同钻孔直径下抽采钻孔抽采影响范围。研究为实现煤与瓦斯共采提供了借鉴。更多还原

【Abstract】 In order to study the law of gas migration in coal seam and ensure the safe production of coal mine,the characteristics of gas migration in porous media were analyzed by means of FLAC and Fluent numerical simulation,and the gas source in mining face was studied,which mainly consists of two parts:gas emission from mining seam and gas emission from adjacent seam.The relationship between initial gas content and residual quantity of coal seam and the mining face were obtained.The prediction results of gas emission were analyzed.The distribution of plastic zone around coal body under different borehole diameters and the influence range of extraction under different borehole diameters were simulated and analyzed.The study provided a reference for realizing the co-mining of coal and gas.更多还原