| 摘要 |
The present invention provides a method for preparing inhibition slurry containing pulverized fuel ash for controlling fire in coal fields, comprising the step of adding pulverized fuel ash, aluminum phosphate, magnesium chloride, sodium carboxymethylcellulose, sodium silicate and sodium-based bentonite material in water to prepare high-inhibition and high-temperature resistant pulverized fuel ash thickened slurry. The prepared thickened slurry is conveyed by means of a high-pressure screw pump through a grouting pipeline to a burning coal seam or into the fractures of coal body. After a period of time, the inhibition slurry can be thickened and solidified into a soft solid form. The inhibition slurry is resistant to high temperature up to 1000°C or above, can form a hard blocky structure after evaporation of water, and can tightly cover the coal and seal the fractures. The pulverized fuel ash containing inhibition slurry is low in cost, safe and environment-friendly, attains an outstanding effect of fire control against spontaneous coal combustion in coal fields, and has good application prospects. |
