Surrounding rock consolidation system for reducing rock burst hazards

A surrounding rock and rockburst technology, which is applied in the field of surrounding rock reinforcement in deep underground rock mass engineering, can solve the problems of high density, high reinforcement cost, and difficult on-site operation, so as to achieve easy suspension, increase the strength of surrounding rock, and reduce rockburst The effect of the risk

CN105927244AInactive Publication Date: 2016-09-07GUANGXI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-09-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a surrounding rock consolidation system for reducing rock burst hazards. The surrounding rock consolidation system comprises a leveling layer, a basalt fiber cloth layer and a plurality of anchor rods. The leveling layer is arranged on the surface of surrounding rock, the basalt fiber cloth layer is arranged on the surface of the leveling layer, and the multiple anchor rods are distributed on the surrounding rock in an implanted manner. A method for implementing the surrounding rock consolidation system includes excavating rock mass, then spraying a layer of concrete on the surface of the surrounding rock in a wet manner and leveling the surrounding rock; quickly adhering basalt fiber cloth with high tensile strength along the surface of the concrete before initial set of the concrete; mounting the anchor rods and allowing the anchor rods to penetrate the basalt fiber cloth and the concrete leveling layer to be implanted in the rock mass. The surrounding rock consolidation system has the advantages that the surrounding rock consolidation system is formed by the surrounding rock, the sprayed concrete, the basalt fiber cloth and an anchor rod group, accordingly, the tensile strength of surface layers of the surrounding rock can be obviously improved, and rock plates formed after the surface layers of the surrounding rock are split off can be effectively prevented from being bent, tensioned and broken off, and rock burst can be suppressed; alternately, the rock plates of the surface layers can be used as protection shields for stopping rock burst fragments from being directly ejected towards excavation faces at the high speeds, and accordingly the rock burst hazards can be reduced.
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Description

technical field

[0001] The invention relates to surrounding rock reinforcement technology for deep underground rock mass engineering, and belongs to the technical field of rock mechanics and engineering. Background technique

[0002] With the gradual deepening of my country's basic engineering construction, hydropower energy development, mine resource development, traffic tunnel engineering, and railway engineering (buried more than 800m), more and more deep underground caverns and deep buried long tunnels / tunnels will appear The number of dynamic disasters in deep underground engineering represented by rockburst is increasing day by day, which poses a huge threat to deep underground engineering and is a key bottleneck restricting the safe construction of deep underground engineering.

[0003] Rockburst is a kind of geological disaster phenomenon caused by the catapult failure of hard and brittle surrounding rocks caused by underground engineering excavation and unloading in ...

Examples

Embodiment Construction

[0031] In order to make the purpose of the present invention and the technical solution clearer, the technical solution of the present invention will be clearly and clearly described below in conjunction with an implementation example in the accompanying drawings of the description and an indoor rockburst test of a basalt fiber cloth and a rock bolt jointly supporting a rock sample. Describe it completely.

[0032] The construction steps of embodiment are as follows:

[0033] In step 101, a leveling layer of wet sprayed concrete is applied on the surface of the surrounding rock of the excavated tunnel.

[0034] Specifically, the tunnel is excavated according to the designed cross-sectional shape, and after the excavation is completed, a concrete leveling layer (30 mm thick can be used) is sprayed on the surface of the surrounding rock of the tunnel using wet spraying technology. The spraying operation is first sprayed upward from the arch foot or the corner of the wall. The s...