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Underground gas plugging coating in coal mine

A gas and coal mine technology, applied in the field of coatings that can block gas leakage in coal mines, can solve the problems of high price, poor fire and flame retardancy, etc., achieve good airtightness, strong adhesion, and prevent gas seepage Effect

Active Publication Date: 2010-07-21
SHANXI LUAN ENVIRONMENTAL ENERGY DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some coal mines use polyurethane materials to block gas, which has a certain effect, but the price of polyurethane materials is relatively high, and the fire resistance and flame retardancy are not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] White Portland cement 30%, quartz powder 30%, talcum powder 9%, fly ash bleaching beads 10%, aluminum hydroxide 10%, magnesium hydroxide 2%, ammonium polyphosphate 4%, melamine 2%, pentaerythritol 2%, and carbon fiber 1%, are sequentially added into a dry powder mixer and mixed evenly to prepare a powder. At the construction site, take 45kg of S400F flexible styrene-acrylic emulsion and pour it into the mixer, add 20kg of water, then add 100kg of prepared powder, and stir evenly. Flame retardancy and antistatic properties meet the coal safety standard (MT113-1995), surface dry time 1.5h, dry time 7h, tensile strength 2.1MPa, elongation at break 50%.

Embodiment 2

[0022] White Portland cement 35%, quartz powder 32%, talcum powder 5%, fly ash bleaching beads 7%, aluminum hydroxide 12%, ammonium polyphosphate 4%, melamine 2%, pentaerythritol 2%, carbon fiber 1% , and sequentially added to a dry powder mixer and mixed evenly to prepare a powder. At the construction site, take 40kg of S400F flexible styrene-acrylic emulsion and pour it into the mixer, add 20kg of water, then add 100kg of prepared powder, and stir evenly. Flame retardancy and antistatic properties meet coal safety standards (MT113-1995), surface dry time 1.5h, dry time 7h, tensile strength 2.2MPa, elongation at break 45%.

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Abstract

This invention provides an underground gas plugging coating in coal mine, consisting of an individually packaged liquid material and a powder material in the weight ratio of 0.3 to 0.45: 1; wherein the powder material comprises the following components by weight percentage: 30% to 45% of concrete, 30% to 40% of quartz powder, 5% to 10% of talcum powder, 5% to 10% of flyash, 7% to 13% of aluminium hydroxide, 0% to 4% of magnesium hydroxide, 2% to 4% of ammonium polyphosphate, 1% to 2% of melamine, 1% to 2% of pentaerythritol and 1% to 1.5% of carbon fiber; the liquid material is flexible styrene-acrylate emulsion or flexible pure acrylic emulsion. The coating is characterized by flame retardancy, antistatic property, watertightness, tight bonding with the coal wall and elasticity, further more, can prevent the gas from leaking after being sprayed on the coal wall, and reduce the gas concentration in the laneway.

Description

Technical field: [0001] The invention relates to a paint, in particular to a paint capable of sealing underground gas leakage in coal mines. Background technique: [0002] Methane gas is a flammable, explosive and harmful gas produced in the coal mine production process. When its concentration is in the range of 5% to 15%, there is a danger of explosion. At present, coal mines mainly use monitoring instruments to monitor the concentration of methane gas in real time, and exhaust the gas through ventilators to reduce the concentration of methane gas underground. However, sometimes the coal walls of newly excavated roadways release a large amount of gas continuously, and it is difficult to reduce the gas concentration of newly excavated roadways below the safe concentration through ventilation alone. Spraying the gas blocking paint on the coal wall can effectively prevent the gas from leaking from the coal wall into the roadway air, reduce the gas concentration in the roadway...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D125/14C09D5/18C09D5/00
Inventor 杨凤玲张文平李会玲尚建国程芳琴
Owner SHANXI LUAN ENVIRONMENTAL ENERGY DEV
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