突出矿井声-电-瓦斯系统监测参量变化及相关性研究

摘要

为研究声发射强度-电磁辐射强度-瓦斯浓度等参量与K1值之间的相关性,基于连续介质损伤力学,分析了声发射、电磁辐射技术监测煤与瓦斯突出的原理,利用KJ838声-电-瓦斯系统对金佳矿11224运输巷进行了跟踪监测.结果表明:KJ838声-电-瓦斯系统能及时对巷道中的环境变化进行响应,放炮期间声发射、电磁辐射、瓦斯浓度出现既定特征变化,同时与常规预测指标K1值之间有较好的相关性.该分析结果可为后续确定煤与瓦斯突出多参量实时监测预警模型和建立预警平台提供参考.%In order to study on monitor parameters and correlation of acoustic emission intensity-electromagnetic radiation intensity-gas concentration and K1,based on the damage mechanics of the continuous medium,the paper analyzed the principles of the acoustic emission and the electromagnetic radiation technology applied to monitor the coal and gas outburst.A KJ838 sound-electricity-gas system was applied to the tracking monitoring of No.11224 transportation and heading roadway in Jinjia Mine.The results showed that the KJ838 sound -electricity-gas system could timely respond the environment variation in the mine roadway,including the acoustic emission,electromagnetic radiation,gas density characteristics variation occurred during the blasting period.Meanwhile,there was a good correlation between the conventional predicted index K1 values.The analysis results could provide the references to the late determination on the real time multi parameters monitoring and early warning model of the coal and gas outburst and the establishment of the early warning platform.