ANALYSIS AND RESEARCH ON REPAIR AND REINFORCEMENT OF ULTRA-DEEP MINE VERTICAL SHAFT

There is a serious collapse in a mine vertical shaft of a cement factory which can not be used． After synthesis analysis and numerical simulation of 2D finite element，the repair and reinforcement scheme，that the template + steel reinforced concrete lining (internal model method) + bolt (soil nailing block method) + Mn steel casing ( casing follow-up method) is confirmed． The plan have already been carried out，and its feasibility is verified． It is a successful case of mine vertical shaft repair and reinforcement．