Keywords low-permeability coal seams;hydraulic-cutting;gas drainage;inhomogeneity;solid-steam coupling;numerical simulation;percolation law;pore and fracture;

• 关键词低渗透煤层;水力割缝;瓦斯抽放;非均质;固气耦合;数值模拟;逾渗规律;孔隙裂隙;