Abstract:

In order to prevent shaft from damaging in Dongtan Mine and better the traditional methods of curing the shaft, a new method that water from the upper aquifer could be injected to the middle and the bottom aquifer to prevent the shaft from damaging was proposed. Also a comprehensive system of monitoring project was eastablished.This method is based on the shaft damage mechanism and the stratigraphic characteristics of Dongtan Mine. Through the engineering analysis of some factors such as the water level of aquifer，the inner deform of stratum and the steady state of shaft lining,we can indicate that the method of automatic Grouting can effectively resolve the problem that water levels continue to decline. It also can improve the compressed state of loose layer as well as prevent rupture of the wellbore. These results can be a proof for the Huang-Huai region with similar conditions to prevent the shaft from damaging.

Key words: shaft rupture, method of automatic grouting, monitoring system, engineering analysis