Groundwater prevention, trenching flood discharge, river diversion, river bed paving, river outcrop crack plugging, and abandoned drilling. Groundwater prevention, water exploration, coal pillar design, sluice and sluice wall. Drainage and depressurization, water plugging and seepage prevention, mine drainage.
Coal mining enterprises must regularly collect, investigate and check the situation of adjacent coal mines and abandoned old kilns, and mark the location of their mine fields, mining years and water accumulation on the above-ground and underground engineering control charts. In mines with complex hydrogeological conditions, it is necessary to establish a dynamic observation system for groundwater in main aquifers, make dynamic observation of groundwater, predict and analyze water disasters, and formulate corresponding comprehensive prevention and control measures such as exploration, detection, prevention, blocking, interception and drainage.
Mine water control
When a mine is divided by a fault, waterproof coal pillars must be left on both sides of the fault. In interconnected mines, waterproof walls with sufficient strength must be built at the joints. The size of waterproof coal pillar should be specified in mine design according to the geological structure, hydrogeological conditions, coal seam occurrence conditions, surrounding rock properties, mining methods and strata movement laws of adjacent mines.
Before the excavation near the water exploration area or the water accumulation area, or before the water accumulation in the flooded roadway is discharged, the design of water exploration and drainage must be worked out, and safety measures to prevent harmful gases such as gas must be taken. The advancing distance of drilling holes for water exploration should be specified in the design of water exploration and drainage according to the height of water head, the thickness and hardness of coal seam and safety measures.