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《Coal Science and Technology》 2005-09
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Lyapunove index to identify chaotic features evolved from underground mine water system

XIAO Jiang~(1,2), TANG Yi-min~(2), ZHANG Huan-ying~(3)(1.China University of Geology, Beijing 100083, China; 2.Hunan University of Science and Technology, Xiangtan 411201, China; 3.Henan University of Science and Technology, Jiaozuo 454000, China)  
The systematic feature index Lyapunov played an important role in the chaotic features of the characterization system and is the coefficient of the sensitive degree ay initial conditions for the quantity statement system. Base on the phase space double structure technology provided by the Pacard and Takens, it is first to decide the relay time and the optimized inserted dimension, then to decide the double structure phase space. With the Lyapunov index method from the single variation provided by Wolf, it is individually to calculate the Lyapunov index of the 4 mine water inrush quantities and times from the large karst mining area in Lianshao coal field of Hunan. According to the identification code of the chaotic features, the results showed that under the mining conditions, there is obvious chaotic features in the evolution of the underground mine water system in each mine area. This will only provide the theoretical references to the detail research of the underground mine water system, but will provide the strong reference to the model to predict mine water inrush.
【Fund】: 湖南省自然科学基金项目(01JJY2042)
【CateGory Index】: P641.12
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