采空区自然发火“三带”规律研究

Study on “Three-Zone” Distribution Law of Spontaneous Combustion of Gob

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。

Spontaneous combustion likely occurs in gob due to self-ignition of coal seam in Xuandong coal mine, which constrains the safety of mining production. Based on this background, temperature and oxygen concentration of gob Were studied to earn the law of spontaneous combustion of gob by the methods of site monitoring and nUmerical simulation. The results show that the width of self-sustaining combustion zone of downcast air roadway is longer than that of return air course. It demonstrates that it is impossible to eliminate danger of spontaneous combustion of gob only relying on increasing the speed of mining.