It offered experiences in shaft sinking through thick overburden by freezing method for Lianghuai area.

This paper demonstrates a successful freezing technology used in thick overburden of Dingji Mine, and sums up the experience of safe construction by freezing method in the thick overburden.

This paper introduces the successful freezing technology and construction experience of Dingji air shaft sinking in thick overburden.

Numerical simulation on vertical stability critical height of variable cross section drilling shaft in deep alluvium;

Experimental study on high strength composite shaft lining in deep alluvium;

Stability of a shaft in thick and deep surface soil is studied when a bottom aquifer of Quaternary System is feeding water to Haizi Mine in Huaibei.

According to Jinqiao mine auxiliary well surface soil s floor pour plasm reinforce and the introduce of wall of a well strain observation technology, this paper analyzed wall of a well s safety assurable technology during the pour plasm, and it put forward synthetic technique development way of deep surface soil breaking wall of a well.

The present high pressure experimental research and analysis of undisturbed deep soil indicate that the static earth pressure of thick overburden is considerable different from that of superficial soil.

Based on the condition of Banji Coal Mine, this paper discusses the selection of shaft sinking techniques through thick overburden, and according to the concerned latest specifications, proposes the designing method of reinforced concrete wall and composite wall with steel plate and concrete in shaft drilling.

This paper summarizes the new freezing technology used in construction of the auxiliary shaft of Longgu Colliery in thick overburden.

Development and prospect of research on artificial freezing method of shaft sinking technology in deep alluvium;

In view of the background that our country will construct large-scale collieries in deep alluvium area, the key technologies which required in the freezing process to be used in the deep shaft are research of the basic theory of frozen soil for deep alluvium,designs of freeze wall and shaft lining structure that suitable for the deep alluvium,and the construction technology of freezin.

The aims of this paper is to solve the problems of sedimentation of deep alluvium because of water loss and longitudinal compression failure in composite shaft lining, and then equicohesively repair it.

The new freezing technology and the new freezing design method used in construction of the auxiliary shaft of Longgu Colliery that its freezing deepness is the first exceed 600 m in thick alluvium.

According to the characteristic of Liangbaosi mine, the author summarized experiences and methods to operate and construct by freezing the thick alluvium, also discussed the methods to freeze the thick alluvium (600m) and construct.