Mine sleeve repairing method

Abstract

The invention discloses a mine sleeve repairing method. The repairing method comprises the steps that (1) a repairing pipe with the appropriate length is selected according to a damage position range of the mine sleeve; (2) the head end of a drill rod and the head end of the repairing pipe are detachably connected , and a through hole in the extending direction of the drill rod is formed in the drill rod; (3) the tail end of the repairing pipe is inserted in a pipeline of the mine sleeve, the position of the repairing pipe is adjusted to enable the repairing pipe to cover the damage position range, and the outer wall of the tail end of the repairing pipe is fixedly connected with the inner wall of the mine sleeve; and (4) a reinforcement agent is injected through the through hole until a gap between the outer wall of the repairing pipe and the inner wall of the mine sleeve is fully filled with the reinforcement agent, and after the reinforcement agent is solidified, a reinforced layer is formed. By adopting the mine sleeve repairing method, the repairing cost of the mine sleeve is effectively reduced, the conduction period is shortened significantly, and meanwhile, a repairing mode and a well cementing mode are simplified.

Description

technical field [0001] The invention belongs to the field of mining machinery, in particular to a method for repairing casings used in mines. Background technique [0002] With the development of drilling technology, various engineering holes have played an important role in the construction and production stages of coal mines. During the drilling construction operation, the mining casing is inserted after the engineering hole is drilled on the surface, and a cement sheath is injected between the outer wall of the mining casing and the inner wall of the engineering hole. However, as time goes by, due to wear and tear, poor management, and rock formation vibrations, etc., the engineering holes are more likely to be damaged, resulting in the rupture of the cement sheath and the mine casing, water leakage and other problems. brought certain hidden dangers. [0003] In the prior art, the method of repairing the engineering hole is mostly used in the whole process of mine casin...

AI Technical Summary

Problems solved by technology

There are some technical problems in the prior art. On the one hand, the pipe length of the repair pipe needs to be consistent with the pipe length of the mine casing. The excessive length of the repair pipe directly leads to the high cost of the pipe material and the injection of the repair pipe. The occurrence of problems such as more cement and higher hoisting costs for hoisting the repair pipe leads to higher repair costs; It is difficult to make adjustments, it is difficult to choose a plan, there are many problems that need to be paid attention to during construction, and the construction period is long

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