采空区煤自燃多参数监测系统的设计与应用

现有的采空区煤自燃监测方式存在监测参数单一、易出现故障、温度测量范围较小、误差较大及维护成本高等问题,根据煤自燃发火的原理及特点,研制了一套采空区煤自燃多参数监测系统。该系统采用分布式光纤原理实现对温度的测量,应用束管监测原理,通过循环分路抽气方式,实现对井下采空区内CH4、O2、CO2、CO相关参数进行连续、在线、就地采集和分析。示范工程实际应用结果表明,该系统可实现对井下采空区多参数的实时自动监测,提高采空区煤自燃发火识别与预警的时效性、准确性及可靠性,提升矿井火灾防治水平。

Design and Application of Multi-Parameter Monitoring System for Coal Spontaneous Combustion in Goaf

Aiming at the problems of single monitoring parameters, easy to break down, small temperature measurement range, large error and high maintenance cost in the existing monitoring methods of coal spontaneous combustion in goaf, a multi-parameter monitoring system of coal spontaneous combustion in goaf has been developed according to the principle and characteristics of coal spontaneous combustion. The system adopted distributed optical fiber principle to measure temperature, and applied bundle tube monitoring principle to collect and analyze the related parameters of CH 4, O 2, CO 2 and CO in goaf continuously, online and locally in underground by cyclic shunt air pumping. The results of practical application of demonstration project show that the system can realize real-time automatic monitoring of multi-parameters in goaf, improve the timeliness, accuracy and reliability of recognition and early warning of spontaneous combustion of coal in goaf, and improve the level of mine fire prevention and control.