巷道两帮煤岩体电磁辐射信号差异分析  

Analysis of Difference in Electromagnetic Emission Signals of the Roadway's Sides

作　　者：牟宗龙[1] 窦林名[1] 陆菜平[1] 李志华[1] 曹胜根[1] 

机构地区：[1]中国矿业大学能源与安全工程学院矿山开采与安全教育部重点实验室,江苏徐州221008

出　　处：《采矿与安全工程学报》2006年第4期427-431,共5页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50474068;50490273;50074030);国家重点基础研究发展规划(973)项目(2005CB221504);高等学校博士学科点专项科研基金项目(20030290017);中国矿业大学科学基金项目(E200423)

摘　　要：根据平煤集团十一矿己二采区煤层具有弱冲击倾向性和属于中等冲击危险采区这一事实,采用电磁辐射预测预报冲击矿压技术,对该采区掘进巷道进行了冲击危险性预测预报,通过对监测到的电磁辐射信号进行分析,得出沿煤层走向掘进巷道的两帮电磁辐射信号存在较大差异这一结论.通过对巷道两帮电磁辐射信号来源、发生机理以及巷道两帮煤体受力情况进行分析,找出了巷道两帮电磁辐射信号有较大差异的原因和影响因素,根据该项技术分析以及所得出的结论,可通过分析冲击矿压危险巷道的地质条件提前对巷道两帮的冲击危险性作出初步对比判断,从而节约冲击矿压防治成本,促进煤矿安全高效生产.The coal seam of Ji-Er stope in the llth coal mine of Pingdingshan coal group was proved to have a weak burst tendency and a moderate risk of rock burst. Based on this situation, the Electromagnetic Emission （EME） technique was adopted to forecast rock burst in the roadway of Ji-Er stope. The analysis of EME signal shows that the EME signals of both sides of the roadway along the strike of coal seams are different. By analyzing the origin of EME signals and the coal stress state of roadway＇s sides,the reason for the EME signal difference has been found out, making it be able to forecast the rock burst based on the EME technique, the result of this study, and the geological conditions,whlch can decrease the prevention cost of rock burst and ensure the safety production in coal mines.

关 键 词：冲击矿压 电磁辐射 巷道两帮 煤层倾角 剪切应力 影响因素 

分 类 号：TD324.2[矿业工程—矿井建设]