Maximal Predicable Time Scale of Gas Emission about Fully Mechanized Mining Face

Abstract:

Aimed at the issue that predicable time scale is neglected about the current gas emission forecast method, the Lyapunov index method in the chaos theory is adopted to research the predicable time scales of gas emission. The measured data of gas emission about a fully mechanized mining face was investgated. The delay time of time series about gas emission was determined by Non-bias multiple autocorrelation method, and the embedding dimension was determined by G-P algorithm is taken to determine. Based on this, the maximal Lyapunov index of ime series was got and the maximal predicable time scale was got. It is avoided that the time scale is too large when making a prediction of gas emission. On the side, the chaotic time series prediction model can make the correct prediction of gas emission based on the calculation of Lyapunov index value.

• Periodical: Materials Science Forum (Volume 857)
• Pages: 583-589
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.857.583
• Online since: May 2016
• Authors: Li Wen He*, Yi Song, Zheng Hua Tan, Hai Yang Long
• Keywords: Chaos, Gas Emission, Lyapunov Index, Predicable Time Scale

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