Anchor-cable anchoring method and structure in loose coal body

Abstract

The invention relates to the technical field of coal body shoring, in particular to an anchor-cable anchoring method and structure in a loose coal body. The anchor-cable anchoring method comprises the following steps that S1, an anchor cable hole is drilled on the coal body; S2, a first anchoring agent with diffusivity is injected into the anchor cable hole; S3, a second anchoring agent used for sealing holes is injected into the upper portion of the first anchoring agent in the anchor cable hole; and S4, an anchor cable is inserted into the first anchoring agent along the anchor cable hole to be stirred till the partial first anchoring agent diffuses into the coal body around the first anchoring agent. Firstly the first anchoring agent is put into the drilled anchor cable hole, then the second anchoring agent is put into the drilled anchor cable hole, and finally the anchor cable is inserted into the drilled anchor cable hole and stirring is conducted. According to the anchor-cable anchoring method and structure in the loose coal body, the anchoring force crushing a side anchor cable of the coal body can be ensured, the pretightening force of the side anchor cable is improved, and the shoring effect of the anchor cable is developed; and deformation of the side portion of a roadway is controlled, and the problem that the roadway is repaired continuously due to the fact that the convergence of the side portion of the roadway of the crushed coal body is large is solved. Meanwhile the anchor-cable anchoring method is convenient to construct underground, an original anchor cable construction process is not added, application and popularization are facilitated, and the anchor-cable anchoring method has a high technical economical effect.

Description

technical field [0001] The invention relates to the technical field of coal body support, in particular to an anchoring method and structure of an anchor cable in a loose coal body. Background technique [0002] In recent years, with the increase of coal mining depth and strength, many broken coal roadways have appeared. This type of roadway has high deformation pressure and difficult support. Simple bolt support is difficult to control the deformation of the side of the roadway. Large, far beyond the allowable deformation range of the roadway. In order to solve the problem that the side of the broken coal roadway has a large amount of movement, the measures taken by the mine are to repair the side anchor cable, and use the high pre-tightening force and high anchoring force of the side anchor cable to strengthen the support strength of the side part and control the The gang moves closer. At present, the side anchor cables are basically anchored by traditional anchoring age...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem that the existing anchor cable anchoring method is difficult to ensure the anchoring force and the anchoring effect of the anchor cable due to the low strength and broken coal body

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