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A self-absorbing type coal mine safety dual-liquid grouting material and its preparation method

A dual-liquid grouting, coal mine safety technology, used in mining equipment, shaft equipment, earth-moving drilling and other directions, can solve the problems of unsuitable grouting, high internal temperature, easy to spontaneous combustion, etc. Good flammability and the effect of avoiding accidents

Active Publication Date: 2017-01-25
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the curing reaction of polyurethane grouting has a large heat release and high internal temperature, which is prone to spontaneous combustion and detonation of gas.
[0003] Chinese patent CN 102942665 B discloses a low-temperature safe polyurethane grouting material for coal and rock mass reinforcement and its preparation method. It uses polyether polyols and polyisocyanates to react to produce polyurethane grouting materials. It has good mechanical properties, but when encountering Water will foam and be expensive
Chinese patent CN 102516465 B also discloses highly elastic waterborne polyurethane-acrylate composite resin and its preparation and application. It adopts polyisocyanate, polyether polyol and acrylate monomer to prepare one-component elastic coating, and has obtained a lot of Good mechanical properties and weather resistance, but not suitable for grouting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A self-absorbing type coal mine safety double-liquid grouting material, the preparation method is as follows:

[0036] Preparation of component A: Weigh 5 parts of N-methylolacrylamide, 85.5 parts of water glass with a modulus of 2.7, 4 parts of butylene glycol, 0.5 parts of sodium persulfate, 2 parts of surfactant OP-10, 1 One part of pentamethyldiethylenetriamine, two parts of bis(3-dimethylaminopropyl) amine are stirred evenly, and it is packaged for subsequent use;

[0037] Preparation of component B: weigh 80 parts of polymethylene polyphenyl polyisocyanate PM200, 20 parts of tripropylene glycol diacrylate, stir evenly, and package for later use;

[0038] Mix components A and B evenly according to the volume ratio A:B=1:1, and cure at room temperature.

[0039] The product indicators of the test materials are as follows:

[0040] Compressive strength (Mpa) 64.9 Expansion multiple 1 Oxygen Index(%) 51.2 Maximum heat storage temperature (...

Embodiment 2

[0042] A self-absorbing type coal mine safety double-liquid grouting material, the preparation method is as follows:

[0043] Preparation of component A: Weigh 8 parts of N-methylolacrylamide, 84.2 parts of water glass with a modulus of 2.5, 2 parts of butylene glycol, 0.8 parts of potassium persulfate, 3 parts of surfactant OP-10, 2 parts Parts of triethylenediamine are stirred evenly, and packaged for later use;

[0044] Preparation of component B: weigh 70 parts of polymethylene polyphenyl polyisocyanate PM200, 10 parts of tripropylene glycol diacrylate, 20 parts of dipropylene glycol diacrylate, stir evenly, and package for later use;

[0045] Mix components A and B according to the volume ratio A:B=0.9:1, and react and solidify at room temperature.

[0046] The product indicators of the test materials are as follows:

[0047] Compressive strength (Mpa) 66.8 Expansion multiple 1 Oxygen Index(%) 49.6 Maximum heat storage temperature (°C) 82.6 ...

Embodiment 3

[0049] A self-absorbing type coal mine safety double-liquid grouting material, the preparation method is as follows:

[0050] Preparation of component A: weigh 10 parts of N-methylolacrylamide, 80 parts of water glass with a modulus of 2.9, 4 parts of butylene glycol, 1 part of potassium persulfate, 3 parts of surfactant OP-10, 1 One part of bis(3-dimethylaminopropyl) amine, one part of triethylenediamine, stirred evenly, packaged for later use;

[0051] Preparation of component B: weigh 90 parts of polymethylene polyphenyl polyisocyanate PM200, 10 parts of tripropylene glycol diacrylate, stir evenly, and package for later use;

[0052] Mix components A and B according to the volume ratio A:B=1:1, and cure at room temperature.

[0053] The product indicators of the test materials are as follows:

[0054] Compressive strength (Mpa) 63.2 Expansion multiple 1 Oxygen Index(%) 50.3 Maximum heat storage temperature (°C) 86.3

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Abstract

The invention discloses a self-heat absorption coal mine safety double-liquid injecting paste material and a preparation method thereof. The self-heat absorption coal mine safety double-liquid injecting paste material adopts N-hydroxymethyl acrylamide, water glass, a chain extender, an initiator, a surfactant and a catalyst to form a component A and adopts polyaryl polymethylene isocyanate and acrylate to form a component B. The component A and the component B are respectively stirred uniformly and mixed according to a volume ratio during use. The water glass is utilized to react with isocyanate, double bonds of a reaction system are polymerized by utilizing generated heat, then heat storage temperature of a sizing agent after solidification is reduced, and mechanical properties of the injecting paste material are greatly improved simultaneously. The injecting paste material with low internal reaction temperature, excellent mechanical properties, good fire resistance and low cost is obtained.

Description

technical field [0001] The invention relates to a chemical grouting material, in particular to a self-absorbing type coal mine safety double-liquid grouting material and a preparation method thereof. Background technique [0002] At present, in the process of coal mining and production, safety accidents are prone to occur due to the complex and changeable geological conditions. For the safe production of coal mines, the coal rock mass must be reinforced by grouting. Currently commonly used inorganic grouting materials, such as water glass, cement, etc., severely limit their range of application due to poor toughness and poor cohesive force. Organic grouting materials include epoxy resin grouting materials, acrylamide grouting materials, and polyurethane grouting materials. Epoxy resin grouting materials have high viscosity and high cost; acrylamide grouting materials are very toxic . Polyurethane grouting materials have been widely used due to their moderate viscosity, ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26E21D11/10C08F283/00C08G18/76C08G18/67C08G18/28
Inventor 杨政鹏刘玄张春静白万备李海艳管学茂
Owner HENAN POLYTECHNIC UNIV
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