煤矸石山深孔注浆灭火的研究

Research on extinguishing fire on coal gangue by deep-hole grouting

煤矸石山自燃释放出大量有毒有害气体,污染环境。在灭火治理过程中易发生中毒、烧烫伤、灭火后易自燃等问题。为了保证煤矸石山灭火施工过程中的安全,并确保灭火效果,笔者对事故发生的原因进行了分析研究。提出了以深孔注浆为主,覆盖为辅的施工工艺。针对煤矸石山自燃时的特点,对注浆灭火材料的选择进行了研究。结果表明,凝胶类、碱性、触变性或初凝时间可控的灭火材料灭火性能较好;最后提出了通过改进钻孔冲洗液的方式,提高矸石山钻孔成孔率。

Numerous kinds of toxic and harmful gas were released,along with coal gangue combustion.Intoxication,burns issues and re-spontaneous combustion were prone to happen during extinguishment.To guaranteer the safety during extinguishment and extinguishing effects,analyze the causes of the accident.Provide the technical process,which is taking deep-hole grouting as primary mean,covering loess or inert materials as secondary one.According to the characteristics of spontaneous conmbustion,analyze the selection of grouting materials.The results show that the materials,which are gellike,alkaline,or thixotropy and initial setting time is controllerable,are better.At last,in order to improve the pore-forming rate,introduce the methods of changing drilling rinses.