School of Resources and Safety Engineering, China University of Mining and Technology (Beiing)

针对资源整合矿井早期粗放式开采导致采空区大量留煤,易引起煤炭自燃问题,以北祖煤矿4+9煤层为研究对象,通过指标气体试验对火区燃烧情况进行研究并采用红外探测技术对巷道顶煤表面高温区域进行划分,结果表明:CO、C2H4和C2H6可以作为北祖煤矿4+9煤层自燃的指标气体,火区温度在80~110℃,且火区有自北向南扩展趋势。研究结果为打钻探测、堵漏等提供了参考。

According to the problem that a large number of residual coal left in the goaf of the resources integration mine because of the early extensive mining, wh ich was easy to cause spontaneous combustion of coal. Taking No. 4 + 9 coal seam of Beizu Coal Mine as a study subject, the combustion situation of fire area was res earched through indicator gas experiment, and the high-temperature area of the roadway roof face was divided through infrared detection technique. The result showed that, CO、C2H4and C2H6could be taken as the indicator gas for spontaneous combustion in No.4 + 9 coal seam of Beizu Coal Mine, the temperature in fire area was 80 ~ 110。C，and there was a tendency that the fire area enlarged from north to south. The research result provided reference for drilling detection and plugging and so on.