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宣东矿煤层具有自然发火倾向,采空区容易发生自燃,制约着煤矿安全生产。以此为研究对象,采用现场实测和数值模拟的手段,对采空区的温度以及氧气浓度进行分析,得到采空区的自然发火规律。结果表明:进风侧可能自燃带的宽度大于回风侧,单纯地靠提高工作面的开采速度,是不能消除采空区自然发火危险的。
The coal seam of Xuan Dong Mine has natural tendency to fire, spontaneous combustion is easy to occur in the goaf and restricts coal mine safety production. Taking this as the research object, the field gassing temperature and oxygen concentration were analyzed by means of field measurement and numerical simulation, and the law of spontaneous combustion in goaf was obtained. The results show that the possible spontaneous combustion zone on the inlet side is wider than the return air side, and the danger of spontaneous combustion in the goaf can not be eliminated simply by increasing the mining speed of the working face.