Analysis of coal and gangue acoustic signals based on Hilbert-Huang transformation
ZHANG Yan-li
ZHANG Shou-xiang
Abstract：Based on Hilbert-Huang transformation, Emepirical Mode Decomposition and Hilbert spectrum analysis were carried out for coal and gangue acoustic signals collected in fully-mechanized face. Frequency and amplitude characteristics of acoustic signals in the case of top coal caving and coal combined with gangue were gotten. In the case of top coal caving, the signals frequency is about 400 Hz to 600 Hz. When the top coal is combined with gangue, signals with high frequency about 1 000 Hz to 2 800 Hz are produced. In the same time, the amplitude of the signals between 400 and 600 Hz is weaken because the coal's quantity is reduced. The acoustic signals' characteristics described above can be used to the recognition of coal-rock interface.
Keywords：Hilbert-Huang transformationcoal and gangue acoustic signalEmepirical Mode DecompositionHilbert spectrum
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 165-168 )