在不利的地质条件下,开采容易自热的煤层时,重点放在预防井下自燃火灾问题上。虽然在实践中广泛地采用了预防措施,煤矿自然发火的危险还仍然很高。每年矿井火灾的发生率表明矿井发火没有下降的趋势,这是由于应用了不完善和不合理的预防措施不能满足现在采矿条件的要求。现在随 Under unfavorable geological conditions, the exploitation of coal seams that are susceptible to self-heating will focus on the prevention of spontaneous combustion of fires underground. Although extensive precautions have been taken in practice, the danger of spontaneous combustion in coal mines remains high. The annual incidence of mine fires shows that there is no declining trend in mine fires due to inadequate and unreasonable precautions that can not meet the current mining conditions. Now with