A mine TBM underground chamber disassembly construction method

Abstract

This invention relates to a method for dismantling a mining TBM in an underground chamber. The method includes the following steps: Step S1: In the construction retreat passage and dismantling chamber, the No. 6, 7, and 8 trolleys of the TBM are dismantled and transported out; Step S2: After the main unit of the TBM and the No. 1-5 trolleys are advanced into the dismantling chamber, the main unit and the No. 1-5 trolleys are dismantled and transported; Step S3: During the dismantling and assembly time interval of the continuous belt conveyor, the main drive of the TBM is transported; In steps S1 to S3, multiple rows of lifting points are set at the top of the chamber circumference according to the stress calculation results. Each lifting point is used in conjunction with the corresponding anchor cable for lifting and dismantling, and then loaded onto a vehicle for transport. This invention employs single-point anchor cable hoisting, dismantling the auxiliary equipment first and then the main unit. The welded sections of the shield body and cutterhead need to be removed. The structure is simple and the process is stable. Although the efficiency is relatively slow, the cross-sectional dimensions of the dismantling tunnel are reduced and optimized, reducing the amount of construction work in the dismantling tunnel and shortening the total dismantling period of the TBM.

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