Pre-grouting technology of freeze hole water channels in full-deep freeze shaft
ZHOU Lin
LIU Chengzhi
ZHANG Guangxue
WEI Jiuchuan
ZHANG Weijie
LI Xiaopeng
Abstract：In order to avoid water disaster caused by freezing hole water channels,on the basis of water gushing mechanism and intensive study of characteristics,the water hazards types induced by freezing holes were summarized:water seepage along the shaft,high pressure water and mud inrush in tunnels connected to the shaft and increase of water inflow in working faces.Then a new pre-grouting technology treating the covert disaster-inducing channels in shaft was put forward on this basis,including determination of the optimal grouting area,exportation and position of freezing holes,design and dynamic adjustment of grouting scheme,establishment of the active working platform,dynamic adjustment of construction parameters,and checking grouting effect.Relied on pre-grouting treatment project of annular space of auxiliary shaft in Yingpanhao Coal Mine,the technology has been successfully implemented and the good grouting effect was obtained.Otherwise,treatment technology has significant advantages in monitoring the time and cost,which has evident reference value for comparable projects in western mining area of China.
Keywords：full-deep freeze sinking methodcovert disaster inducing channelpre-grouting in shaftmine water disaster
Publication Date：2017-01-01