Coal seams in the minefield have been affected by coal spontaneous combustion and duplicated burning in the old fire areas, which is a serious threat to safety.Production of coal mine.

• 矿区所属各矿井田范围内煤层在开采过程中一直受煤层自然发火和上部老火区复燃的影响,严重威胁着矿井的安全生产。