Abstract:

Abstract: This paper introduces the operation process of the raise-boring drilling method and some common accidents during raise-boring drilling and analyzes their reasons. As a focus, it thoroughly analyzes some common accidents possibly occur-ing during pilot hole drilling operations with raise-boring machines, including diameter shrinkage, borehole collapse, drill pipe sticking, deviation beyond limits, lost circulation, etc., and then provides instructive treatment plans and methods based on the analysis results. This paper is of great guidance significance to pilot hole drilling operations with raise-boring machines.

Key words: raise-boring Machine, pilot hole, accident cause, treatment measure