Numerical Analysis of an Interaction between Hydraulic-Powered Support and Surrounding Rock Strata
Publication: International Journal of Geomechanics
Volume 13, Issue 2
Abstract
Longwall mining is the only technically proven and well-established mining method used worldwide for extracting coal from deep mines. In this paper, two-dimensional (2D) continuum finite-element models of longwall panels are developed and analyzed to understand the interaction of hydraulic-powered support with surrounding rock strata (i.e., roof, floor, and coal seam). The finite-element models thus developed include the structural components of hydraulic-powered support, the surrounding rock mass, and broken rocks. The study focuses on the evaluation of strata behavior while the coal face is supported by hydraulic-powered supports of different capacities. The results from finite-element models are further analyzed in terms of stress distribution in hydraulic legs, abutment, and roof-to-floor convergence. Statistical relations are developed based on deterministic finite-element results, which provide a good correlation with the field measurements.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 13 • Issue 2 • April 2013
Pages: 181 - 192
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Apr 6, 2010
Accepted: Nov 4, 2011
Published online: Mar 15, 2013
Published in print: Apr 1, 2013
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