Suspension mechanism and application of sand-suspended slurry for coalmine fire prevention

摘要: Abstract North and west China has abundant coal resources, however, such resources make these regions prone to serious mine fire disasters. Although the copious sand fly ash found in areas can be used as fire-fighting materials, conventional grouting is expensive because of water shortage loess particles. A new compound material (i.e., a sand-suspended colloid), which comprises mineral inorganic gel an organic polymer, developed current study improve quality injection reduce wastage when grouting. The steadily suspend sand, through addition small amount colloid yielding steady slurry. process producing slurry convenient quick, overcoming sand-suspending thickeners need heat are difficult produce. space work model based on theory double-electric layer established suspended mechanism solid particles colloid. dispersion effect demonstrated by incorporation electrostatic steric hindrance particles, ensuring stability system suspension Mechanical analysis indicates that under condition rock stress lower part fluid less than yield Finally, fire-prevention technology was applied tested Daliuta Coal Mine, achieving successful results.