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我省现在开采有自燃倾向性的煤层产量约占75％,其中中厚、厚、特厚煤层产量约占90％,这些煤层在开采过程中,不但丢煤多,而且通风系统复杂,容易出现各种形式的漏风,给煤炭自燃提供了有利条件,因而自燃火灾时有发生。新密矿务局的生产矿井几乎都发生过煤炭自燃。“义马局”煤矿尤为突出,该局煤矿开采侏罗系长焰煤,燃点为268～270℃,煤层极易自燃,发火期短,一般为21～34天,往往因综采搬家稍慢而造成自燃。随着机械化程度的不断提高,煤炭玻碎度增大,采空区浮煤增加和矿井负压加大,采空区遗煤自燃有上升的趋势。因此,防治采空区遗煤自燃是安全生产的当务之急。 在目前防止煤炭自燃的综合措施中,均压防灭火技术具有简单易行、灵活应用和立即见效的特点,是一种较为先进的措施。 均压防灭火技术的实质是消除漏风供氧的
Coal mining in our province now has the tendency of spontaneous combustion of about 75%, of which thick, thick, thick coal seam production accounts for about 90% of the coal in the mining process, not only lost more coal, and the ventilation system is complex and prone to Various forms of air leakage provide favorable conditions for spontaneous combustion of coal, and spontaneous combustion and fire have occurred from time to time. Almost all of the production mines in Xinmi Mining Bureau have spontaneous combustion of coal. “Yima Bureau” coal mines are particularly prominent, the bureau coal mining Jurassic long-flame coal, burning point 268 ~ 270 ℃, the coal seam is extremely easy to spontaneous combustion, short period of fire, usually 21 to 34 days, often moving slowly due to fully mechanized mining Caused by spontaneous combustion. With the continuous improvement of the degree of mechanization, the degree of coal briquette increased, the floating coal in the goaf increased and the negative pressure in the mine increased. The spontaneous combustion of coal in the goaf had an upward trend. Therefore, prevention and control of spontaneous combustion of coal in goaf is a priority for safety production. In the current comprehensive measures to prevent spontaneous combustion of coal, both pressure fire-fighting technology has the characteristics of simple, flexible and immediate effect, is a more advanced measure. The essence of fire suppression technology are to eliminate leakage air supply oxygen