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Low-temperature mine reinforcing material

A reinforcement material and mining technology, applied in mining equipment, shaft lining, tunnel lining, etc., can solve the problems of low mechanical properties, long curing time, and high price of reinforcement materials, so as to achieve easy control of product quality and avoid underground safety accidents , On-site construction quick effect

Pending Publication Date: 2021-03-30
山西潞安晋安矿业工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional reinforcement materials have low mechanical properties, long curing time, high cost, and poor safety. Their reaction temperature is as high as 140°C, which is not conducive to the safe reinforcement of underground coal seams.
The price of pure inorganic reinforcement materials is low, but the stability is poor, the curing time is long, and the effect of on-site treatment is not obvious
Pure organic reinforcement materials have superior mechanical properties, good stability, less dosage, convenient construction, and obvious on-site treatment effects, but they are expensive and poor in safety

Method used

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  • Low-temperature mine reinforcing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A reinforcement material for low-temperature mines, which is an organic-inorganic composite material, containing two components, A and B. The component A consists of 92% water glass by weight, 4% powder polycarboxylate water reducer, 2 % of N,N-bis(2-hydroxyethyl)aminomethylphosphonic acid diethyl ester and 2% of N,N-bis(3-dimethylaminopropyl)-N-diisopropanolamine.

[0021] Component B consists of 68% polymethylene polyphenyl polyisocyanate, 15% polyether polyol MV500, 15% polyether polyol GY420, 2% vinyl acetate; The parts are mixed according to the volume ratio of 1:0.9 to make low-temperature mine reinforcement materials.

Embodiment 2

[0023] A kind of reinforcement material for low-temperature mining, which is an organic-inorganic composite material, containing two components A and B. The component A consists of 90% by weight of water glass, 6% powder polycarboxylate water reducer, 3 % of halophosphate FR-780 and 1% of N,N-bis(3-dimethylaminopropyl)-N-diisopropanolamine and organic bismuth combination.

[0024] Component B consists of 70% polymethylene polyphenyl polyisocyanate, 15% polyether polyol MV500, 13% polyether polyol GY420, 2% vinyl acetate; The parts are mixed according to the volume ratio of 1:1 to make a low-temperature mine reinforcement material.

Embodiment 3

[0026] A reinforcement material for low-temperature mines, which is an organic-inorganic composite material, containing two components A and B. The component A consists of 91% water glass by weight, 5% powder polycarboxylate water reducer, 3 % of N,N-bis(2-hydroxyethyl)aminomethylphosphonic acid diethyl ester and 1% of N,N-bis(3-dimethylaminopropyl)-N-diisopropanolamine.

[0027] Component B consists of 69% polymethylene polyphenyl polyisocyanate, 20% polyether polyol MV500, 10% polyether polyol GY420, 1% vinyl acetate; The parts are mixed according to the volume ratio of 1:1.1 to make low-temperature mining reinforcement materials.

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Abstract

The invention discloses a low-temperature mine reinforcing material, and relates to the technical field of chemical grouting reinforcement of coal and rock masses. The organic-inorganic composite material comprises a component A and a component B. The component A comprises water glass and a first auxiliary agent, and the percentage content ratio of the water glass to the first auxiliary agent in the component A is 90-92%: 8-10%. The component B comprises polyisocyanate and a second auxiliary agent, the second auxiliary agent comprises polyether polyol and a toughening agent, and the percentagecontent ratio of the polyisocyanate to the second auxiliary agent in the component B is 68-70%: 30-32%; the reinforcing material provided by the invention has high flame retardancy and high mechanical properties; by conducting advanced reinforcement on loose and broken coal and rock masses, faults and subsidence areas, underground safety accidents can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of coal and rock mass chemical grouting reinforcement, in particular to a low-temperature mine reinforcement material. Background technique [0002] Chemical grouting reinforcement materials have been used in the daily production of coal mines as a conventional technology. Chemical grouting reinforcement technology can change the loose structure of surrounding rock in time, improve the overall strength of rock mass, thereby increasing the construction speed and ensuring the normal succession of the working face. It is worth applying in coal mines when abnormal conditions such as faults pass. In addition, in other links of coal production, such as: the side of the coal face, roof fall and other similar situations, this technology can also be used for treatment. Therefore, chemical slurry injection reinforcement technology is a practical support technology to ensure mine production safety. Due to the special...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08K13/02C08K3/34C08K5/5353C08K5/17C08K5/521C08K5/12E21D11/10
CPCC08L75/08E21D11/10C08L2201/02
Inventor 冯洁王留着白广平王华丹
Owner 山西潞安晋安矿业工程有限责任公司