Research and application of water control of thick sandstone in coal roof

With the continuous exploitation of coal resources, the reserves of coal resources in the eastern region are decreasing. Now the exploitation of coal resources is gradually transferring to the western region. The hydrogeologic types in the western mining region are quite different from those in the eastern region. The main types of water hazards are thick sandstone aquifer water in coal roof, characterized by the continuous increase of mine water inflow. Mine water inflow increases with the length of roadway development and mining area; there are many aquifers filled with water; mining water-conducting fractured zone develops high. According to the analysis of field measurement and water quality test data, the mining water-conducting fractured zone is highly developed and has strong water conductivity. In order to study the characteristics of the thick sandstone aquifer in the roof and its water control methods, the hydrogeological conditions and water control methods in the relevant areas were studied.