黄陵二号煤矿顺煤层瓦斯有效抽采半径数值模拟

Numerical Simulation of Effective Gas Extraction Radius of Bedding Drilling in Huangling No.2 Coal Mine

利用在煤岩体孔隙、裂隙内的瓦斯流动,建立符合黄陵二号煤矿的顺层钻孔抽采渗流模型,并利用COMSOL Multiphysics模拟了瓦斯在煤体内部运移规律,得出合理的钻孔抽采瓦斯有效半径,并考虑到不同的抽采负压、渗透率造成的影响,为以后瓦斯抽采工作提供了重要依据。

Using gas flow within the pore and fracture of coal and rock mass,bedding drilling mining seepage model of Huangling No. 2 Coal Mine was established, gas migration law in the internal coal was simulated by using COMSOL Multiphysics software, then a reasonable and effective radius of the gas drainage was obtained. In the process of analysing, the influences of different negative pressure and permeability to radius were also considered. These conclusions have provided important basis for future gas drainage work.