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Method for treating rock outburst

A rockburst and bedrock technology, applied in soil protection, solid waste management, sustainable waste treatment, etc., can solve the problems of large slump, prone to rockburst, and low flexural strength, so as to reduce rockburst hazards, good application prospects, and the effect of improving durability

Inactive Publication Date: 2009-09-23
王衡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] A method for controlling rock bursts, comprising anchoring and spraying a layer of elastic concrete on the bedrock of an underground engineering excavation face, the thickness of the elastic concrete layer is 10cm, and the elastic concrete is made of the following raw materials in parts by weight: silicon Salt cement 400kg, sand 635kg, the soil content in the sand is 2%, gravel 1050kg, concrete compound 60kg, bromine 12kg, rubber particles 28kg, particle size 1mm, elastic additive group A powder 20kg, group B The liquid is 12kg, and the raw materials of the elastic concrete are fully mixed, then stirred evenly, and sprayed on the bedrock with the existing anchor spraying equipment until the required thickness is sufficient.

Embodiment 2

[0012] A method for controlling rock bursts, comprising anchoring and spraying a layer of elastic concrete on the bedrock of an underground engineering excavation face, the thickness of the elastic concrete layer is 15cm, and the elastic concrete is made of the following raw materials in parts by weight: silicon Salt cement 480kg, sand 655kg, the soil content in the sand is less than 3%, gravel 1350kg, concrete compound 72kg, bromine 14.4kg, rubber particles 33.6kg, particle size 3mm, elastic additive group A powder 57.6kg , Group B liquid 24kg, fully mix the raw materials of the elastic concrete, then stir evenly, use the existing anchor spraying equipment to spray on the bedrock until the required thickness.

Embodiment 3

[0014] A method for controlling rock bursts, comprising anchoring and spraying a layer of elastic concrete on the bedrock of an underground engineering excavation face, the thickness of the elastic concrete layer is 12cm, and the elastic concrete is made of the following raw materials in parts by weight: silicon Salt cement 450kg, sand 655kg, the soil content in the sand is 1%, gravel 1050kg, concrete compound 72kg, bromine 13kg, rubber particles 28kg, particle size is 1mm, elastic additive group A powder 57.6kg, B Mix 12kg of liquid, fully mix the raw materials of the elastic concrete, then stir evenly, and use the existing anchor spraying equipment to spray on the bedrock until the required thickness.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00
CPCC04B2111/503C04B2111/00155C04B2111/00741C04B41/009C04B28/04C04B41/5079Y02W30/91C04B14/00C04B41/4543C04B14/02C04B14/06C04B18/22C04B22/128
Inventor 王衡
Owner 王衡
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