粉煤灰复合胶体在火区治理中的应用

Application of fly ash composite colloid in fire zone treatment

采空区煤自燃是煤矿生产中常见灾害之一,粉煤灰胶体能够有效利用粉煤灰封堵漏风通道、充填采空区空间、保水降温扑灭高温火源,且可控性好、不会产生次生灾害、有效利用垃圾等特点。在火区治理中,以1930煤矿煤自燃为例,采用西安科技大学防灭火团队研发的胶体防灭火技术,通过自地面向采空区打钻后灌注复合胶体,充分充填采空区空间、包裹高温煤体、封堵漏风通道等工艺流程进行治理。经后续半年多不间断观测,火区一氧化碳气体浓度从999ppm降至15ppm以下,没有出现任何异常,效果非常明显,对治理矿井煤火具有重要的推广价值。

Coal spontaneous combustion in goaf is one of the common disasters in coal mine production.Fly ash colloid can block air leakage passage,fill goaf space,keep water and cool down to extinguish high temperature fire source,and has the characteristics of good controllability,no secondary disasters,and effective use of garbage.In the fire zone treatment,taking one coal mine as an example,using the colloidal fire-fighting technology developed by the fire-extinguishing team of Xi’an University of Science and Technology,the composite colloid was injected through the ground drilling to goaf.After more than half a year of continuous observation,the concentration of carbon monoxide gas in the fire zone decreased from 999 ppm to less than 15 ppm.There was no abnormality,and the effect was very obvious,which has important promotion value for controlling coal fire of mine.