Lyapunov指数在电磁辐射预测煤矿动力灾害中的应用  

Application of Lyapunov Exponent in Forecasting Dynamic Disaster of Coal Mine by Electromagnetic Radiation

作　　者：郝延坤 张浩权 刘泽平 

机构地区：[1]河南平宝煤业有限公司,河南襄城461714

出　　处：《中州煤炭》2012年第8期7-9,共3页Zhongzhou Coal

摘　　要：电磁辐射指标综合反映了煤岩动力系统演变情况。为了讨论电磁辐射时间序列是否具有混沌特征,实现电磁辐射的预报,提前了解煤岩体未来的动力变化情况,利用在线式电磁辐射监测仪KBD7对掘进煤巷进行了跟踪监测,用小数据量方法计算了实测电磁辐射时间序列的最大Lyapunov指数,结果表明其具有混沌特征,电磁辐射短期内可以预测,适当选择样本容量和排除干扰可以提高预测精度。The evolution of the coal and rock dynamic system can be reflected by the electromagnetic radiation（EMR） indexes. To dis- cuss whether EMR time series have chaotic characteristics,realize the forecasting of EMR, and to understand the dynamic changes of coal and rock in the future, a roadway was monitored by on-line electromagnetic radiation monitor（ KBD7 ）during the excavation. The largest Lyapunov exponent of monitored EMR time series was calculated based on method of small data sets,the results show that the EMR time series have chaotic characteristics,EMR can be predicted in short term,the precision can be improved by eliminating inter- ference and choosing the appropriate sample size.

关 键 词：煤岩动力灾害 电磁辐射 LYAPUNOV指数 混沌 

分 类 号：TD324[矿业工程—矿井建设]