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为解决古山三井综放工作面采空区自燃防治及危险区域划分的难题,并探究采用温升率划分自燃危险区域的可靠性和确定合理指标值,通过采用现场气体和温度监测与理论分析相结合的方法,研究综放工作面采空区氧气浓度和温度及温升率的分布情况、氧气体积分数划分氧化危险区域分布情况、温升率划分危险区域分布情况,结果表明,在采空区内较深处靠近进风一侧部分区域温度相对较高,采空区距离工作面较近的区域温升率大于1℃/d,埋入采空区越深温升率越小;采用温升率和氧气体积分数法划分采空区氧化危险区域时两种方法之间存在着较大的差别,以温升率在0~1℃/d作为氧化升温带的划分标准更为合理.
In order to solve the problem of spontaneous combustion prevention and control and danger zone division in the gob of the fully mechanized top coal caving and working face in San Shan coal mine and to explore the reliability and the reasonable index value of the risk zone of spontaneous combustion by using the temperature rise rate and by using the on-site gas and temperature monitoring and theoretical analysis Combined with the method to study the distribution of oxygen concentration and temperature and the rate of temperature rise in the gob of the fully mechanized caving mining workface, the distribution of the oxidation danger zone by the oxygen volume fraction and the distribution of the danger zone by the temperature rise rate. The results show that in the goaf In the deeper part, the temperature near the inlet side is relatively high. The temperature rise rate in the goaf close to the working face is more than 1 ℃ / d, and the deeper the rate of temperature rise in the goaf is, There is a big difference between the two methods in dividing the risk area of oxidation in the mined-out area by the rate of rise and the volume fraction of oxygen. It is more reasonable to use the temperature rising rate of 0 ~ 1 ℃ / d as the dividing standard of the oxidation temperature increase zone.