Foam concrete slip-casting system and method for mine hole collapse prevention

Abstract

The invention discloses a foam concrete slip-casting system for mine hole collapse prevention. The system comprises a crawler hydraulic drilling machine capable of adjusting the inclination and power,a sleeve rod device, an inflation or water injection capsule device, an inflation or water injection and monitoring and feedback device, and a slip-casting device for slip-casting at a hole collapseposition. In addition, the invention also discloses a foam concrete slip-casting method for mine hole collapse prevention. The method includes: after rod retracting, a sleeve rod is conveyed again; anouter rod is removed; air inflation or water injection of a capsule is carried out; a foam concrete slurry is conveyed; and hole sealing is carried out after initial setting of the foam concrete slurry. The foam concrete prepared based on a chemical foaming method has advantages of high gas permeability, high strength and low cost. The capsule that can be expanded and has high flexibility can beapplied to drilling under conditions of different hole diameters, different inclination angles and different coal qualities. The foam concrete slip-casting system can be applied to mines with different geology with high practicability.

Description

technical field [0001] The invention relates to the technical field of gas drainage engineering, in particular to a foam concrete grouting system and method for preventing and controlling mine hole collapse. Background technique [0002] The calorific value of coalbed methane is 2-5 times that of common coal. The calorific value of 1 cubic meter of pure coalbed methane is equivalent to 1.13kg of gasoline and 1.21kg of standard coal. Its calorific value is equivalent to that of natural gas, and it can be mixed with natural gas. After all, it is very clean and hardly produces any waste gas. It is a good fuel for industry, chemical industry, power generation and residential life. When the air concentration of coalbed methane reaches 5%-16%, it will explode when encountering an open flame, which is the root cause of coal mine gas explosion accidents. When coalbed methane is directly discharged into the atmosphere, its greenhouse effect is about 21 times that of carbon dioxide, ...

AI Technical Summary

Problems solved by technology

At present, most of the exploration and application of foam concrete consider its light weight, high strength, thermal insulation effect, and less research on its air permeability. Therefore, it is urgent to improve the deficiencies of foam concrete in this aspect

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