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

A foam concrete and grouting system technology, which is applied to drilling equipment and methods, earthwork drilling, mining equipment, etc., can solve the problems of less research on air permeability, achieve improved prevention and control technology, good use effect, and increase drainage efficiency effect

Pending Publication Date: 2018-12-11
XIAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not as a limitation to the present invention.

[0031] Such as Figure 1-Figure 3 As shown, a kind of foam concrete grouting system for the prevention and treatment of mine hole collapse in this embodiment includes a crawler hydraulic drilling rig 19 that can adjust the inclination and power. The hydraulic drilling rig 19 includes a fuselage 13, crawlers 12, bearings Table 18, stand 17, motor 16, outer drill pipe 15 and inner drill pipe 14; the system also includes a rod sleeve device 24, an air-inflated or water-injected capsule device, air-inflated or water-injected and its monitoring and feedback device, and injection of the position of the collapsed hole. Grouting device for grouting;

[0032]The rod sleeve device 24 includes an outer rod 20 threadedly conne...

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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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/02E21B3/02E21B7/20E21B33/13E21F7/00
CPCE21B7/02E21B3/02E21B7/20E21B33/13E21F7/00
Inventor 刘超张超秦雷凌伟黄晓晟杨铭扬
Owner XIAN UNIV OF SCI & TECH
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