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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References
ANSYS 6.1 [Computer software]. Canonsburg, PA, ANSYS Inc.
Deb, D. (2012). “Finite element method concepts and applications in geomechanics.” Rock and rock mass failure criteria, 2nd Ed., Prentice Hall, New Delhi, India, 183–184.
Filcek, H., and Kwasniewski, M. A. (1993). “Fundamentals of mine roadway support design: Rock-support interaction analysis.” Comprehensive rock mechanics, J. A. Hudson, ed., Pergamon Press, Oxford, U.K., 671–699.
Pappas, D. M., and Mark, C. (1993). “Behavior of simulated longwall gob material.” Rep. of Investigators 9458, U.S. Bureau of Mines, Washington, DC.
Pariseau, W. G., Puri, S., and Schmelter, S. C. (2008). “A new model for effects of impersistent joint sets on rock slope stability.” Int. J. Rock Mech. Min. Sci., 45(2), 122–131.
Peng, S. S., and Chiang, H. S. (1984). Longwall mining, Wiley, New York.
Samadhiya, N. K., Viladkar, M. N., and Al-Obaydi, M. A. (2008a). “Numerical implementation of anisotropic continuum model for rock masses.” Int. J. Geomech., 8(2), 157–161.
Samadhiya, N. K., Viladkar, M. N., and Al-Obaydi, M. A. (2008b). “Three-dimensional joint/interface element for rough undulating major discontinuities in rock masses.” Int. J. Geomech., 8(6), 327–335.
Sitharam, T. G., and Madhavi Latha, G. (2002). “Simulation of excavations in jointed rock masses using a practical equivalent continuum approach.” Int. J. Rock Mech. Min. Sci., 39(4), 517–525.
Smart, B. G. D., and Haley, S. M. (1987). “Further developments of the establishment of stress development in a caved waste.” Min. Sci. Technol., 5(2), 121–130.
Trueman, R., Lyman, G., Callan, M., and Robertson, B. (2005). “Assessing longwall support-roof interaction from shield leg pressure data.” Mining Technol. IMM Trans. A, 114(3), 176–184.
Verma, A. K., and Deb, D. (2007). “Analysis of chock shield pressure using finite element method and face stability index.” Mining Technol. IMM Trans. A, 116(2), 67–78.
Wardle, L. J. (1993). “The numerical modeling for underground coal mine design.” Comprehensive rock mechanics, J. A. Hudson, ed., Pergamon Press, Oxford, U.K., 733–748.
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© 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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