不同尺度电磁辐射时间序列的混沌特征初步分析  

Chaotic characteristic of electromagnetic radiation time series of coal or rock under different scales

作　　者：刘贞堂[1] 赵恩来[1] 王恩元[1] 王静[2] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221008 [2]中国矿业大学图书馆,江苏徐州221008

出　　处：《煤炭学报》2009年第2期224-227,共4页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)资助项目(2005CB221505);国家863计划资助项目(2006AA06Z119);"十一五"国家科技支撑计划资助项目(2006BAK03B02-04;2007BAK29B01);教育部新世纪优秀人才支持计划资助项目(NCET-06-0477);中国矿业大学煤炭资源与安全开采国家重点实验室开放基金资助项目(07KF12);中国矿业大学青年科研基金资助项目(OY080234)

摘　　要：基于混沌理论,研究了不同尺度煤岩电磁辐射时间序列的混沌特征.研究结果表明:小尺度煤岩电磁辐射脉冲数序列和现场煤岩电磁辐射时间序列的关联维数均收敛于稳定的饱和值,具有混沌特性;有冲击危险时,电磁辐射时序的饱和关联维D2数值较大,变化剧烈;无冲击危险时,电磁辐射时序的饱和关联维数D2数值较小,变化平缓.电磁辐射时序饱和关联维数的变化,可用于监测预报煤岩动力灾害.Based on chaos theory, the chaotic characteristic of electromagnetic radiation time series of coal or rock under different scales was studied. The results show that the correlation dimension of electromagnetic radiation time series of small-scale coal or rock and coal mine converges to stable saturation value, which shows that these electromagnetic radiation time series have chaos characteristics. When there is danger of coal seam burst, the value of saturation correlation dimension D2 of electromagnetic radiation time series is bigger and it changes greatly, on the contrary, its value is smaller and changes smoothly. The change of saturation correlation dimension of electromagnetic radiation time series can be used to forecast coal or rock dynamic disasters.

关 键 词：煤岩 电磁辐射 时间序列 混沌特征 

分 类 号：TD713.2[矿业工程—矿井通风与安全]