卸压瓦斯抽放过程中煤层自燃预报指标分析

Analysis of Seam Spontaneous Combustion Prediction Index During Pressure Released Gas Drainage Procedure

为解决宣东二号煤矿因抽放卸压瓦斯而导致的煤层自然发火危险增大的问题,根据对煤样升温氧化气体和瓦斯抽放钻孔内标志气体的分析,建立基于钻孔φ(CO)/φ(CO2)指标的煤层自然发火预报体系,实践证明:φ(CO)/φ(CO2)指标的有效分辨率达90%以上,可以用于宣东二号煤矿煤层自然发火早期预报及合理安排瓦斯抽放。

In order to solve the problem of seam spontaneous combustion danger increasing occurred by the pressure released gas drainage in Xuandong No. 2 Mine, according to the analysis on the temperature increased oxidized gas of the coal sample and the index gas in the gas drainage borehole, the seam spontaneous combustion prediction system was established based on the φ （CO） /φ （CO2） indexes in the borehole. The practices showed that the efficient resolution ratio of the φ （CO） /φ （CO2 ） indexes could reach over 90% and could be applied to the early prediction of the seam spontaneous combustion and the ration gas drainage layout in Xuandong No. 2 Mine.