Method for preparing active-carbon-containing colloid gas foam for preventing gas emission in gob

Abstract

Active-carbon-containing colloid gas foam for preventing gas emission in a gob is provided, wherein active carbon powder is dispersed into water and is added with certain amount of thickener to prepare an active-carbon-containing thick solution at a certain concentration, and small amount of cross linking agent and foaming agent are added into the solution and is physically and mechanically stirred and foamed under the action of air to prepare the active-carbon-containing colloid gas foam. After the colloid gas foam is injected into the gob through a slip casting pipeline of a mine, a large area of float coal in the gob can be covered and the coal crack can be blocked, the active carbon is used to fully adsorb the free gas in the gob, and meanwhile, a film-shaped colloid covering material like cloth is formed on the surface of the coal to achieve the purpose of long-lasting effective inhibition of emission of the coal gas. The effect of the active-carbon-containing colloid gas foam on preventing gas emission in the gob is remarkable, the cost is low, and the prospect of application is wide.

Description

technical field [0001] The invention relates to a preparation method of activated carbon-containing colloidal foam, which is especially suitable for wrapping floating coal in goafs, blocking coal body cracks, adsorbing free gas in goafs and preventing gas from gushing out of a cloth-like film-like colloidal foam preparation method. . Background technique [0002] Mine gas is one of the main natural disasters in coal mining in my country. In recent years, with the rapid development of mining technology and equipment, a large number of high-yield, high-efficiency and intensive mines featuring comprehensive mechanized coal mining have emerged in my country. Due to the high mining intensity, concentrated production and fast advancement, the residual coal in the goaf has increased, and the floating coal has released a large amount of gas in the goaf. When a large amount of gas is accumulated in the goaf, it is often brought into the working face by air leakage, causing the gas ...

AI Technical Summary

Problems solved by technology

These methods are effective for low-gas mines or mines with low output, but as the mines are excavated deeper, the gas content gradually increases, low-gas mines are transformed into high-gas or outburst mines, and the integration of low-production mines will also change For high-yield and high-efficiency mines, at this time, the above-mentioned methods cannot effectively solve the problem of gas overrun in the corner of the return air

At the same time, because the wind curtain is located at the edge of the goaf, the gangue falling from the gob can easily damage the wind curtain, resulting in increased air leakage from the wind curtain; adding exhaust fans will increase the cost and affect the limited usable area of ​​the roadway; infinitely increasing the air volume is also Impossible; high-level horizontal drilling and goaf gas drainage generally have problems such as large construction engineering volume, long drainage time, tight drainage replacement, high one-time investment and high operating costs

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