Surrounding rock consolidation system for reducing rock burst hazards

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.

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 ...

AI Technical Summary

Problems solved by technology

[0005] The invention patent with application publication number CN101270667A introduces a surrounding rock support system for extremely strong or moderate rockburst sections in deeply buried underground caverns. Rockburst strength, when the rockburst strength is high, it is necessary to arrange dense anchor rods and anchor cables, which will bring about the problem of high reinforcement costs

In addition, the adjustment of the layout density of the support structure depends on the experience of the on-site personnel, and the on-site operation is difficult

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