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1979～1983年,在迈切克各矿的采用长壁工作面采煤的自然发火煤层中进行了综合研究。用无灰干燥煤的重量计算出来的挥发分最能够充分说明这些矿井所开采的煤层的自然发火性,这些挥发分的平均值为20～35％。煤的活化能为40～70千焦耳/摩。对“佩奇巴尼亚”、“瓦沙什”、“别塔”、“科什舒特”和“佐巴克”矿的214个工作面的数据进行了统计处理。在这些矿井中,煤层厚度在4米以下的103个工作面采用不分层开采,厚煤层中的60个工作面采用分层开采,其中51个工作面采用顶板冒落法开采。五分之一的工作面采用前进式开采,一半多一点的工作面采用后退式开采,其余的采用混合方法开采。
From 1979 to 1983, a comprehensive study was carried out in the spontaneous combustion of coal in long-wall coal faces at each mine in Miceche. Volatiles calculated from the weight of ash-free dry coal most fully characterize the spontaneous combustion of coal seams that are mined in these mines, with an average of 20-35% of these volatiles. The activation energy of coal is 40-70 kJ / mol. Data on 214 facets from the “Pechinia”, “Vashash”, “Beitut”, “Koshchute” and “Zobak” mines were statistically processed. Among these mines, 103 facets with a coal seam thickness of 4m or less are stratified mining, and 60 facets in the thick seam are stratified mining, of which 51 facets are mined by the roof caving method. One-fifth of the working face adopts forward mining, more than half of the working face adopts backward mining, and the rest is mined using a hybrid method.