Method for treating rock outburst

Abstract

The invention relates to the underground construction technical field, in particular to a method for treating rock outburst which solves the problems that when the existing underground construction is evacuated, low pressure strength, lacking toughness, non-resilience, low rupture strength, and easy happening rock outburst exist in methods such as working surface bolting and shotcreting rigid concrete and the like for preventing rock outburst. The method is as follows: a layer of elastic concrete is bolted and shotcreted on an underground construction excavation working surface; the elastic concrete is made from Portland cement, sand, gravels, concrete complexing agent, bromine, rubber kernels and elastic additive; the spay layer can be firmly bonded on a stone head to form a concrete structure with dense structure, specific elongation, elasticity and toughness, pressive strength reaching up to 60 MPa and the rupture strength increased to four times of the pressive strength; the concrete structure has certain resilience, can reduce the damage of the strong impact force gathered in the rock mass on the terrane, increases the durability of a concrete member, greatly reduces the damage of rock outburst, and solves a difficult problem for the underground construction building which is difficult to be overcome all the time.

Description

technical field [0001] The invention relates to the technical field of underground engineering, in particular to a method for controlling rockburst. Background technique [0002] Rockburst is a common unloading damage geological disaster phenomenon in underground engineering in high geostress areas, that is, the accumulated deformation energy in the rock mass is suddenly and violently released during the excavation of underground engineering, resulting in the phenomenon of rock bursting and ejection. There are only flaked rock slices, no ejection phenomenon, and the magnitude of 4.6 can be measured in serious cases, accompanied by a loud sound. The reason is that the stress of the surrounding rock exceeds its elastic limit, and the elastic deformation accumulated in the rock body can suddenly and violently freed. [0003] At present, in areas where rockbursts are prone to occur, it is necessary to effectively combine various support methods such as bolts, advanced bolt supp...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problems of low compressive strength, slow solidification, large slump, and more importantly, lack of toughness in the existing underground engineering excavation by adopting methods such as anchor spraying rigid concrete on the working face to prevent rockburst. , no springback, low flexural strength, prone to rockbursts, providing a method to control rockbursts