重庆大学学报：自然科学版2012，Vol.35Issue(3)：108-114,7.
含瓦斯煤体破坏过程中AE序列关联维数演化分析
Correlation dimension analysis of AE sequence under failure process of gas-filled coal
摘要
Abstract
The correlation dimension evolution characteristics of acoustic emission（AE） time-series during the instability and failure of coal with and without gas are analyzed base on fractal theory.The results show the coal rock＇s AE time-series of deformation stages have obviously fractal characteristics under uniaxial loading.The processes of AE of deformation have different self-similarity,and the correlation dimension can describe the mechanical state of coal.During the triaxial loading process,the stress-varying trend of AE time-series of coal with and without gas is similar to the trend of AE correlation dimension.The sharp decrease of AE time-series＇ correlation dimension can be considered as a ＂precursor＂ for failure.This feature doesn＇t change with the change of confining pressure and gas pressure.关键词
含瓦斯煤体/损伤/声发射/关联维数/瓦斯吸附Key words
gas-filled coal/damage/acoustic emission/correlation dimension/gas adsorption分类
矿业与冶金引用本文复制引用
刘延保,曹树刚,李勇,郭平,张遵国..含瓦斯煤体破坏过程中AE序列关联维数演化分析[J].重庆大学学报：自然科学版,2012,35(3):108-114,7.基金项目
国家自然科学基金资助项目 （）
重庆市科委自然科学基金计划资助项目 （）
重庆大学西南资源开发及环境灾害控制工程教育部重点实验访问学者基金资助项目 （）
