Method for securing upper end of mine-duct filled with poriferous mass against breakage of ground, involves filling of reinforced and non-reinforced concrete in hollow drill that is pulled before concrete solidification

摘要

The method involves removing soil from an upper end of a duct (1), where the soil encompasses poriferous mass. Concrete filling form stoppers that are held in the ground directly or indirectly. The removal of the poriferous mass and the soil, and filling of the concrete are carried out step by step by providing of supplement bored piles (5-8) at the cross section of the stoppers using a hollow drill and filling of reinforced and non-reinforced concrete in the drill, which is pulled out before solidification of the concrete.