Tunnel rockburst prevention support method and support system based on active support concept

Abstract

The invention relates to the technical field of transportation, water conservancy, mining and other engineering, and provides a tunnel rockburst prevention support method based on the active support concept. The method includes the following steps: forming a drill hole in the wall surface, provided with a first concrete layer, of a to-be-supported tunnel; arranging an expansion shell type prestressed anchor rod in the drill hole, and controlling the expansion shell type prestressed anchor rod to apply a radial force to the tunnel wall for active support; arranging a steel bar net on the first concrete layer, spraying a second concrete layer on the surface of the steel bar net to cover the steel bar net on the first concrete layer. The method can effectively prevent the occurrence of rockburst and reduce the probability of safety accidents in tunnel support construction. The invention further provides a tunnel rockburst prevention support system based on the active support concept, and the system is established by the method and can effectively prevent the occurrence of rockburst and reduce the probability of the safety accidents in tunnel support construction.

Description

technical field [0001] The invention relates to engineering technical fields such as traffic, water conservancy, and mining, and in particular to a support method and support system for tunnel rockburst prevention based on the concept of active support. Background technique [0002] The rockburst disaster in the process of underground engineering construction is a major safety problem faced by the engineering community. Up to now, the control of rockburst at home and abroad, especially the design of support measures, mostly adopts the concept of passive protection. The so-called passive support means relying on support The strength of the protective structure itself can resist possible rockburst disasters. The support measures under this prevention concept cannot apply the radial stress of the cave wall in time to improve the stress state of the cave wall. At the same time, the release of deformation energy in the rock body cannot be realized during the rockburst prevention...

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Problems solved by technology

[0004] The present invention provides a tunnel anti-rockburst support method based on the concept of active support, aiming to improve the safety in the support process of the existing tunnel anti-rockburst support method based on the concept of active support. bad question

[0005] The present invention also provides a tunnel anti-rockburst support system based on the concept of active support, which also aims to improve the safety of existing tunnel anti-rockburst support methods based on the concept of active support. sexual problems

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