Water channels include coal seam roof and floor mining induced fissures,faults,karstic subsided columns,Quaternary scuttles,fissure concentrated zones and badly sealed boreholes.

• 充水通道包括顶底板采动裂隙、断层、岩溶陷落柱、第四系天窗、裂隙密集带及封闭不良钻孔等,其中顶底板采动裂隙、断层、岩溶陷落柱为主要导水通道。