含软弱煤层掘进工作面电磁辐射突出预测应用研究.docVIP

 n 含软弱煤层掘进工作面电磁辐射突出预测 应用研究 马国强，刘贞堂** 5 10 （中国矿业大学 安全工程学院,江苏 徐州 221116） 摘要：为了研究软分层煤体对煤与瓦斯突出影响作用，并应用于突出危险预测。对掘进巷道 突出规律进行分析，利用电磁辐射监测仪对掘进工作面前方煤体电磁辐射进行现场测试，分 析软煤厚度变化电磁辐射响应规律。结果表明：软煤电磁辐射水平要高于硬煤；有突出危险 性时，软煤电磁辐射信号反应强于硬煤，电磁辐射“跳变”明显；软煤突然消失、软煤厚度 变化幅度大于等于 0.8m 或持续保持厚度大于等于 1.1m 时，突出危险性增大；电磁辐射对软 煤厚度变化响应敏感，与软煤厚度变化呈“选择性”正相关性。 关键词：煤与瓦斯突出；掘进工作面；软煤厚度；电磁辐射；预测 中图分类号：TD713 15 Application Research of Predicting Coal and Gas Outburst Using Electromagnetic Radiation in Heading Face with Soft Layer Coal Ma Guoqiang, Liu Zhentang 20 25 30 35 40 (Faculty of Safety Engineering, China University of Mining Technology, Xuzhou, Jiangsu 221116) Abstract: In order to study the effect role of soft layer coal on coal and gas outburst,and applied to outburst fatalness prediction.According to the analysis and summing-up of the historical outburst law in excavation roadway and electromagnetic radiation (EMR) produced by coal was measured using EMR monitor in excavation roadway,EMR response law by the thickness changes of soft coal was analyzed. The results showed that EMR level produced by soft coal is higher than hard coal.When outburst fatalness is existence,EMR signals produced by soft coal have more strongly reflected than hard coal and EMR’s “jump” is significant.When soft coal disappeared suddenly or the thickness change range of soft coal is greater than or equal to 0.8m or the thickness is greater than or equal to 1.1m continuously, outburst fatalness is increased. EMR has a sensitive response to the thickness changes of soft coal and shows a “selective” positive correlation with it. Key words: coal and gas outburst; heading face; thickness of soft coal; electromagnetic radiation; prediction 0 引言 煤与瓦斯突出是矿井开采过程中煤岩体向采动空间迅速猛烈喷出的一种动力现象[1]。随 着矿井开采深度不断加大，突出危险性呈增加趋势，对突出危险做出准确的预测预报是突出 防治的关键[2]。目前传统的接触式预测法（钻屑量 、钻屑瓦斯解吸指标Sh2、K1、钻孔瓦 斯涌出初速度 q、R 指标法等）具有一定的局限性，测试耗费大量的人力物力，影响生产， 且预测结果准确性也不是很高，易受人工操作影响[3]。电磁辐射是煤岩体受载变形破裂过程 中向外辐射的一种能量，与煤岩体受载状态及变形破裂过程密切相关[4]。电磁辐射技术预测 作者简介：马国强(1985-)，男，内蒙古通辽人，硕士研究生，从事矿井通风与安全