A Supporting Equipment Aiming at the Ejection Problem of Anchor Rod and Cable Cover Plate

Abstract

The invention discloses a support method and support equipment aiming at the ejection of anchor bolt and anchor cable cover plate. According to different surrounding rock conditions, the key parameters of grouting are scientifically selected, and the grouting equipment is used to inject grouting bolts. Internal rapid grouting, the grout diffuses into the cracks of the rock mass through the grouting bolt, and grouts into the surrounding rock body of the roadway, so that the grout diffuses, compacts and condenses in the cracks in the rock mass, and breaks the loose parts within the reach The surrounding rock is cemented into a whole, and the grout under pressure is retained in the surrounding rock body of the roadway to increase the initial support resistance of the surrounding rock, form a slurry cemented reinforced arch, and construct the superficial part of the surrounding rock to have a certain internal stress The ring body of the surrounding rock makes the connection between the multi-layer anchor rod and the multi-layer spray layer more firm, forms multiple protection circles inside the surrounding rock, and at the same time makes the grouting anchor rod and the rock mass quickly cemented together to reduce the depth The stress difference of the surrounding rock, thereby preventing the dangerous situation of ejection of the bolt and the anchor cable.

Description

technical field [0001] The invention relates to the field of roadway support, in particular to a support method and the field of support equipment for the ejection of anchor rods and cable covers. Background technique [0002] As we all know, in the initial stage of roadway excavation, due to the change of the stress field of the surrounding rock, the principal stress difference of the roadway shows a slow, rapid and rapid growth trend from the shallow part to the deep part. In the shallow part of the surrounding rock, the principal stress difference is the smallest. Compared with the high stress of the deep surrounding rock, it is almost in an infinitely small state, and the strength of the surrounding rock is extremely low, and it is the most vulnerable to damage; while toward the deep direction of the surrounding rock, the stress difference becomes smaller and smaller compared with the deep surrounding rock, and the surrounding rock The rock strength and internal stress a...

AI Technical Summary

Problems solved by technology

[0002] As we all know, in the initial stage of roadway excavation, due to the change of the stress field of the surrounding rock, the principal stress difference of the roadway shows a slow, rapid and rapid growth trend from the shallow part to the deep part. In the shallow part of the surrounding rock, the principal stress difference is the smallest. Compared with the high stress of the deep surrounding rock, it is almost in an infinitely small state, and the strength of the surrounding rock is extremely low, and it is the most vulnerable to damage; while toward the deep direction of the surrounding rock, the stress difference becomes smaller and smaller compared with the deep surrounding rock, and the surrounding rock The rock strength and internal stress are getting higher and higher, so the deep surrounding rock is most likely to be stable. For the roadway support under the rock burst environment, we can not only resist the high stress of the deep surrounding rock from the strength of the supporting material, but also The fundamental solution is to improve the mechanical properties of the surrounding rock and reduce the stress difference in the deep and shallow surrounding rock. This is the fundamental way to solve the high stress roadway in the deep well, and the stress difference in the deep and shallow surrounding rock will lead to the ejection of the anchor rod and the anchor cable. Dangerous situation, which in turn leads to the loss of support of the roadway and collapse. In the existing technology, this problem cannot be solved. Therefore, it is necessary for us to propose a support method and support equipment for the ejection problem of the anchor bolt and cable cover.

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