Flexible supporting structure and method for rock burst roadway

Abstract

The invention relates to a flexible supporting structure and method for the rock burst roadway, the supporting structure comprises a thin spraying lining layer, epoxy resin grouting materials in roadway surrounding rock grouting holes and anchor cables, and the thin spraying lining layer on the surface of the roadway, the epoxy resin grouting materials injected into the roadway surrounding rock grouting holes and the anchor cables distributed on surrounding rock around the roadway are matched; and a spatial multi-layer energy absorption supporting structure of roadway surface reaction type resin thin spraying layer supporting, roadway broken surrounding rock epoxy resin material grouting and roadway deep anchor cable flexible supporting is formed. The supporting method comprises the following steps that: a reaction type resin thin spraying layer material is sprayed on the surface of a roadway after the roadway is tunneled until the reaction type resin thin spraying layer material is cured to form a thin spraying lining layer; drilling holes are constructed around a roadway, then an anchoring agent is fed into the drilling holes, then an anchor cable is inserted and connected with a drilling machine, the drilling machine is started to evenly stir the anchoring agent, a tray is installed after the anchoring agent is solidified, and the anchor cable is tensioned to preset anchoring force; roadway surrounding rock grouting holes are constructed in the periphery of the roadway, and epoxy resin grouting materials are injected into the holes regularly.

Description

technical field [0001] The invention belongs to the technical field of mine safety, and in particular relates to a flexible support structure and a support method for rock burst roadways. Background technique [0002] Rock burst is a mine dynamic phenomenon characterized by sudden, sharp, and violent damage in the process of coal mining. Theory and practice show that most of the rock burst occurs in the roadway, and the control of the surrounding rock of the roadway is to prevent the occurrence of rock burst. effective measures. [0003] For a long time, many scholars have conducted a lot of research on the control of rock burst roadway. In the early stage, a single support form was used to support the rock burst roadway, but rock burst still occurred frequently; in the middle stage, combined support, such as bolt + U-shaped bracket combined support, anchor rod + I-shaped steel bracket combined support, anchor rod + O-shaped bracket combined support, but there are problems ...

AI Technical Summary

Problems solved by technology

[0003] For a long time, many scholars have conducted a lot of research on the control of rock burst roadway. In the early stage, a single support form was used to support the rock burst roadway, but rock burst still occurred frequently; in the middle stage, combined support, such as bolt + U-shaped bracket combined support, anchor rod + I-shaped steel bracket combined support, anchor rod + O-shaped bracket combined support, but there are problems of slow support construction speed, high labor intensity and high cost, which lead to the support It is difficult to apply and popularize the technology on a large scale; in recent years, large deformation support systems and high energy-absorbing materials have been more and more used in rock burst roadway support, such as large deformation anchor + single hydraulic prop + foam aluminum combined support Support methods and forms such as truss anchor cable support, constant resistance and large deformation anchor (cable), high impact toughness anchor support, etc., can reduce the occurrence of rock burst to a certain extent, but from the field application Look, there are still problems of high labor intensity and high support cost, which also limits the large-scale application and promotion of this support technology

[0004] In the prior art, the support of the roadway under rock burst is carried out for supporting components such as anchor rods, anchor cables, metal supports, etc., and the stability of the surrounding rock is improved by applying force to the surrounding rock of the roadway. When it happens, a strong dynamic load acts on the roadway surrounding rock and supporting components, so that the entire support system is passively loaded, so the resistance of the roadway to rock burst is still small

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