Process for sinking and stabilizing a shaft in a waste dump comprises forming a reinforced shaft collar close to a dump cover and lining, sinking a lower shaft section, straightening the wall of the section, and lining with gunned concrete

摘要

Process for sinking and stabilizing a shaft in a waste dump comprises forming a reinforced shaft collar (7) having a smaller diameter than a lower shaft section in the region of a dump cover (2) and lining, sinking a lower shaft section up to a prescribed end depth using a well grab (4), straightening the wall of the lower shaft section with a cutting pipe and evening out, and lining the lower shaft section from above to below with gunned concrete. Preferred Features: The gunned concrete is reinforced with mixed steel fibers. Reinforcing rods are fixed to the shaft collar before concreting the lower shaft section. A conically running transition region is produced in the transition region between the shaft collar and the lower shaft section.