Abstract:  The vertical discharge is a difficulty during construction of shaft boring machine, hence, the technology of vertical discharge for fullface shaft boring machine is proposed. First, the technical principle and discharge capacity of the vertical discharge system are introduced. And then some technologies such as slag particle size control, slag scraping of scraper conveyor, slag removal at blind area and slag transfer of bucket elevator are analyzed. Finally, the boring tests under various conditions with different thrust forces and torques are carried out. The results show that the vertical discharge technology is feasible, the particle size is controllable and the discharge system runs normally. The vertical discharge of fullface shaft boring machine is a feasible method for mechanized continuous discharge, which helps to advance the construction technology of shaft boring.

Key words:  , fullface shaft boring machine, vertical discharge, particle size control, scraper conveyor, bucket elevator