Information Construction of Large Diameter Mine Shaft in Mengxi Mining Area

According to the large diameter of the mine shaft, high water inflow value, mine shaft passing through ultra thick overburden and other problems occurre d in the construction of the mine auxiliary shaft in the Nalinhe No. 2 Mine, the information means were applied to realize the real time monitoring and measuring of the f reezing temperature field, mine shaft stress, freezing wall displacement and other parameters during the mine shaft freezing and the excavation and lining period. With the reverse analysis conducted on the relevant parameters, the variation law of the mine shaft internal and external liners, the mine shaft liner stress, the creep law of t he mine shaft freezing wall and other decision and predicted data could be mastered. With the predicted data, the grouting opportunity could be rationally selected and t he engineering quality could be ensured. The construction period of the whole mine shaft was only six months and was two months ahead of the construction schedule.