Abstract: The traditional drillandblast and shaft sinking methods have limitations in the construction of deep and blind shafts. Accordingly, the mechanized shaft sinking technology of a fullface shaft boring machine(SBM) with upper muck discharge is proposed and studied to realize onetime shaft completion. First, the design concept of the proposed SBM is introduced, and the working principles of the excavation, muck discharge, support, and guidance systems, along with the specific performance parameters of the machine, are introduced. Second, the construction requirements of the starting shaft, equipment assembly sequence, commissioning steps, specific process of shaft section construction, and machine disassembly sequence are extensively described, and the advantages and application prospects of fullface SBM are further summarized. Finally, based on an industrial test of a fullface SBM with upper muck discharge in the shaft construction of the Ninghai pumpedstorage power station, the SBM construction schedule is analyzed, and the corresponding countermeasures for unfavorable geologies are proposed.

Key words:  , upper muck discharge, fullface shaft boring machine, shaft sinking technology, industrial test