基于电磁辐射峰谷比值法的煤与瓦斯突出预警

Early warning of coal and gas outburst based on peak-to-valley ratio method of electromagnetic radiation

为了提高电磁辐射预警煤与瓦斯突出危险的准确性,减少误报现象,在分析大量电磁辐射现场数据基础上,基于电磁辐射预警煤与瓦斯突出危险原理,提出了电磁辐射峰谷比值法,利用正态分布统计特征计算每个班次的电磁辐射瞬时强度峰值均值和谷值均值,并将其比值作为煤与瓦斯突出危险性的预警值。最后,将该方法应用于义忠煤矿11112风巷掘进工作面,研究结果表明:与临界值系数和动态变化趋势系数法相比,峰谷比值法误报较低,预警准确性高,能够很大程度上减少误报对生产的影响。

In order to improve the accuracy of electromagnetic radiation early warning on coal and gas outburst danger, and reduce the false alarm, on the basis of analyzing a large number of electromagnetic radiation field data, an electromagnetic radiation peak-to-valley ratio method was proposed based on the principle of electromagnetic radiation early warning on coal and gas outburst danger. The peak and valley mean values of the instantaneous intensity of electromagnetic radiation from each shift were calculated by using the statistical characteristics of normal distribution, and the peak-to-valley ratio was taken as the early warning value of coal and gas outburst danger. Finally, the method was applied in the 11112 air roadway heading face of Yizhong coal mine. The results showed that the false alarm was less compared with the critical value coefficient method and the dynamic change trend coefficient method. The peak-valley ratio method can improve the accuracy of early warning and reduce the impact of false alarm on production to a large extent.