煤炭自燃及常用防灭火措施的阻燃机理分析

根据煤体的大分子结构形式，探讨了煤在破压裂过程中和低温经过程中活性自由基团的生成以及煤的自燃机理；分析了煤的变质程度、浮煤堆放蓄热环境和漏风供氧对煤炭自然氧化的活性自由基链式反应过程的影响。并将活性自由基链式反应理论用于解释黄泥浆、喷洒灌注阻化链和注氮的阻燃机理。

MECHANISM ANALYSIS OF COAL SPONTANEOUS COMBUSTION AND FLAME RETARD OF CONVENTIONAL FIRE PREVENTING AND EXTINGUISHING MEASURES

According to the coal large molecular structure forms,the producing of active free radical in the process of breaking and fracturing of coal and of low temperature oxidation of coal, as well as the spontaneous combustion mechanism of coal are discussed.The influence of the degree of coal metamorphism, the storing heat circumstances of loosing and piling up coal, the air leaking on the process of active free radical chain reaction of coal natural oxidation are also analyzed. And the active free radical chain reaction theory into explaining the flame retard mechanism of thick loess grouting,spraying separating agent and nitrogen injection are applied. In the end, the practical observing natural combustion laws and the successful preventing and extinguishing fire cases have proved the correctness of the active free radical chain natural oxidation reaction theory of coal and fully illustrated the implementation effect of several fire preventing and extinguishing measures.