Research on the Application of High Water Filling and Lane Retention Technology in Fully Mechanized Mining Face
In order to achieve efficient and safe retention of the return airway in the 30505 fully mechanized mining face,and to address the problems of hard roof of the return airway,obvious mining face pressure,high gas content in the mined coal seam,and tendency for spontaneous combustion,it is proposed to apply high water filling retention technology to the 30505 return airway retention,and create a relatively good stress environment for the retention section through top cutting and pressure relief.Detailed analysis and engineering application of the layout plan for top cutting and pressure relief technology,as well as high water filling and roadway retention technology were conducted.After on-site application,the deformation and air leakage of the surrounding rock in the retained section of the 30505 return airway were relatively small,achieving good retention effect.
leaving alleys along the airhigh water filling materialcutting the top to relieve pressurehard roofspontaneous combustion coal seam
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