Correlations Between Mechanical and Index Properties of Sandstone from the Central Salt Range
M. Reuter, M. Krach, U. Kießling, J. Veksler
Marco Systemanalyse und Entwicklung GmbH, Dachau, Germany
Keywords: Longwall face, squeezing-out, spalling, acoustic noise, spectral peak frequency
Abstract
Based on the mathematical modeling of the geomechanical condition of a coal face, it is shown that destruction of the face zone occurs in the form of squeezing-out and spalling within an operational cycle. The acoustic noise in the longwall is analyzed, and the noise spectrum peak frequency is determined. The peak frequency is reflective of the size of the damage area in the face zone.
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