Radial Horizontal Coal and Gas Control Technology of Surface Water Jet in Dashe Mine
The 2#coal seam of deep mining in the lower part of the northeast wing and the west wing of Dashe Mine is buried deeply.The gas pressure and content of 2#coal seam gradually increase with the burial depth,and the gas gushing amount is large in the process of excavation and mining.The traditional underground gas control method cannot effectively solve this problem,and new gas control models need to be tested.In the process of underground gas treatment,gas treatment is often subject to the limitation of time and space,the implementation of gas treatment measures cannot be effectively guaranteed,and there is the risk of gas overlimit caused by jet holes in the process of underground construction.The surface gas treatment can effectively solve this problem.Surface gas treatment can effectively extract the planned mining area of the mine and get rid of the limitations of underground gas treatment.It is necessary to conduct gas treatment in advance for the lower panel area of the northeast wing of Dashe Mine and the deep panel area of the west wing of Dashe Mine.Surface gas treatment can advance the gas treatment of the panel area on the basis of no tunneling roadway,and can be extracted for a long time to provide security.It is necessary to control the surface gas before roadway excavation and mining.
radial horizontal coal breaking by water jetfracturing coal seamsground gas extraction
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