Abstract:

Dahaize mine region belong to the Cretaceous and Jurassic coal-bearing strata. The compressive strength of aqueous soft rock is low, and mine shafts are constructed by full deep freezing method. This article describes the necessity and implementation of filling water shut-off technology of freezing pipe annular space in the aqueous soft rock strata in the west by combining engineering practice. This paper also propose a number of technical measures and nature points to control the quality of implementation and ensure the safety of construction and production of mine shafts. The process of slurry replacement is implemented smoothly and achieve the desired results.

Key words: full deep freeze, freezing pipes, annular space, replacement, retarding cement slurry