A grouting method for solid pipe in fractured layer

Abstract

The invention discloses a solid pipe grouting method of a broken layer. The solid pipe grouting method of the broken layer comprises the following steps that first drilling is carried out, reaming iscarried out, lowering of a first core barrel is carried out, and a pressure-tight test is carried out, wherein two times of hole washing, the second drilling, reaming, and lowering of a second core barrel by adopting drill pipes one by one and the pressure-tight test are included. The solid pipe grouting method of the broken layer has the beneficial effects that the accumulated water can be discharged twice, so that the accumulated water removal work is ensured; furthermore, the problem of long-distance pipe lowering in the broken layer is solved by adopting a mode of sectioned lowering of thesecond rock barrel meanwhile, the power of a drilling machine is adopted to lower a pipe, so that the labor intensity of workers is reduced, and the safety during pipe lowering is ensured; in addition, coring bits and reducer joints with corresponding diameters can be separately machined according to the requirements of different water exploration and drainage drilling pipe lowering to solve theproblem of pipe lowering of the core barrels with various diameters.

Description

technical field [0001] The invention relates to a pipe-solid grouting method, in particular to a broken layer pipe-solid grouting method. Background technique [0002] The Huainan coalfield belongs to the water-filled mine of the compound aquifer water in the Cenozoic loose sand layer and the floor karst water. Threatened by the karst water in the floor, it is necessary to drain and depressurize the A-group coal before mining, and the floor limestone exploration releases water. Drilling is currently the most effective way of hydrophobic pressure reduction. During the construction of the bottom limestone water exploration and discharge hole, due to factors such as the periodic pressure of the roadway and the fault structure zone, the surrounding rock in the hole was seriously broken, resulting in the submerged casing not being lowered to the designated position, which could not meet the safety needs of water exploration and discharge. Through continuous exploration and impro...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a broken layer solid pipe grouting method that solves the problem of the inability to drain accumulated water and the difficulty of lowering the pipe in the prior art

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