极易自燃煤层发火特性试验研究

Experimental Study on Ignition Characteristics of the High Spontaneous Combustion Tendency Coal Seam

煤炭开采过程中受煤层伴生CO气体的影响,煤层极易自燃且存在煤层自然监测和预报难度大的问题。本文采用试验模拟的研究方法对宁夏宁东矿区煤层发火特性进行研究,确定了气体指标的选择、煤层自燃发火判定参数及其与煤温的关系,找出了在矿井开采条件下灵敏度较高的指标气体及其对应的特征温度,明确了矿区煤自然氧化升温过程中的自燃特性参数,这对建立和完善宁东矿区煤层自燃监测预报及预报技术体系具有重要意义。

Coal mining process is affected by the associated CO gas in the coal seam. The coal seam is easy to spontaneous combustion and the difficult problem for coal seam is natural monitoring and prediction. In this paper, the characteristics of the coal seam ignition in Ningdong mining area of Ningxia are studied by the method of experimental simulation. The selection of gas index, the determination parameters of spontaneous combustion and the relation with the coal temperature are determined, and the index gas with high sensitivity and its corresponding characteristic temperature under the condition of mine mining is found out. The spontaneous combustion characteristic parameters of coal spontaneous combustion in the east mining area of Ningxia are specified,which has a great significance to establish and improve the monitoring and forecasting technology system for spontaneous combustion of coal seam in Ningdong mining area.