Application of Efficient Grouting and Blocking Water Technology in Single Lining Shaft Wall of Giant Thick Sandstone Aquifer

For the deterioration of lifting system running environment because of auxiliary shaft water spraying in Hezhuang Coal Mine, shaft grouting scheme is formulated through the analysis of wellbore formation lithology, the occurrence, scope and reasons of water gushing. Back shaft water spraying is blocked successfully through efficient and rapid grouting and plugging technology of taking a combination of high and low pressure, combination of deep and shallow holes, and by ways of small flow, medium pressure grouting. Water plugging effect and the benefit is obvious.