摘要
为实现煤与瓦斯突出危险性的动态、连续预测,根据煤岩强度统计损伤理论,分析煤岩电磁辐射强度与应力关系,建立不同泊松比煤岩动力灾害与电磁辐射响应模型。利用基于该模型研制的KBD7在线式电磁辐射监测仪,对沈阳煤业集团红菱煤矿1200工作面集中运输巷和1204工作面回风顺槽进行连续监测,预测两工作面的煤与瓦斯突出危险性。结果表明:电磁辐射强度与常规预测指标、煤与瓦斯突出危险性有很好的相关性;1200掘进工作面电磁辐射临界值为49 mV,煤与瓦斯无突出危险预测准确率为100%,有突出危险预测准确率在70%以上;1204工作面未预测出瓦斯突出危险情况。该方法可实现煤与瓦斯突出危险性的非接触、动态、连续、定向及区域性监测,为煤矿安全生产提供了技术支持。
Aimed at realizing the dynamic and continuous monitoring of coal and gas outburst,this paper describes an analysis of the relationship between electromagnetic radiation strength and stress of coal and rock mass,according to the coal and rock strength statistic damaging theory,and development of a dynamic casualty-electromagnetic radiation response coupled model for charactering the rock with different poisson＇s ratio.A continuous monitoring of central tunnel of 1200 working face and return air course tunnel of 1204 working face of Hongling Coal Mine which belong to Shenyang Coal Trade Group Corporation Limited Liability Company for predicting the coal and gas outburst by using a KBD7 online electromagnetic radiation monitoring instrument developed,based on the coupled model,shows that there are a strong correlations between electromagnetic radiation strength and conventional predicting indexes and outburst risk.1200 exploiting working face has the critical electromagnetic radiation value of 49 mV.This working face shows an accuracy of prediction for non-outburst of 100%,and accuracy of prediction for outburst of 70% or more.The outburst situation is not yet predicted in 1204 working face.The prediction of the risk of coal and gas outburst using electromagnetic radiation allows a dynamic,continuous,non-contacting,directional and regional test with no need of drilling,providing technical support for safe production in coal mines.
出处
《黑龙江科技学院学报》
CAS
2011年第5期389-394,共6页
Journal of Heilongjiang Institute of Science and Technology
关键词
煤与瓦斯突出
危险性预测
电磁辐射强度
力电耦合
临界指标
coal and gas outburst
risk prediction
electromagnetic radiation
mechanical-electrical coupling
critical value
