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冲击地压破坏是一非线性动力学过程,因此基于微震时间序列,采用定性和定量方法深入系统的分析其混沌特性,为冲击地压的混沌预测打下基础。简单介绍了微震监测的基本原理和冲击地压的混沌特征显现。在MATLABR2009b环境下,以微震累计能量时间序列为例,应用功率谱方法确定其具有非周期性;采用主成分分析将其与噪声信号区别开来;计算出其最大Lya-punov指数>0,判定系统具有混沌特性;计算出的关联维数描述了系统的混沌程度。
Rockburst is a nonlinear dynamic process. Based on microseismic time series, the chaotic characteristics of the rockburst are systematically analyzed by qualitative and quantitative methods, which lays the foundation for the prediction of rockburst. The basic principle of microseismic monitoring and the appearance of chaotic characteristics of rockburst are briefly introduced. In the MATLABR2009b environment, taking the microseismic cumulative energy time series as an example, the power spectrum method is used to determine the non-periodicity; the principal component analysis is used to distinguish it from the noise signal; and the maximum Lya-punov index> 0 is calculated, The system has the characteristics of chaos; the calculated correlation dimension describes the degree of chaos of the system.