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An experimental investigation of the ultimate strength of laterally constrained rock beams

Paper discusses the testing of rock beams that are restrained from expanding laterally as tensile cracking occurs. Continued testing yielded observations on the new failure mechanisms and the increase in ultimate load

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Abstract

The design and performance of an apparatus to examine the ultimate load capacity of laterally constrained rock beams is described. Using this apparatus, an extensive series of tests was performed to study the effect of various parameters on the behavior of such beams. Some sample results are presented.

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References

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  4. Hudson, J.A., Crouch, S.L. andFairhurst, C., “Soft, Stiff and Servo-Controlled Testing Machines—A Review with Reference to Rock Failure,”Engrg. Geology,6, (3),155–189 (1972).

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  5. Wright, F.D. andMirza, M.B., “Stress Distribution Around a Vertical Crack in a Mine Roof Beam,”Trans. AIME,226,174–179 (1963).

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Authors and Affiliations

  1. University of Minnesota, 55455, Minneapolis, MN

    R. L. Sterling & C. R. Nelson (Assistant Professor)

Authors
  1. R. L. Sterling
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  2. C. R. Nelson
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Additional information

R.L. Sterling was Project Engineer, Setter, Leach & Lindstrom, Inc., Minneapolis, MN 55409; is now Director, The Underground Space Center, University of Minnesota

This paper is based upon research supported by the National Science Foundation under Grant No. APR 72-03575. Any opinions, findings and conclusions or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of the National Science Foundation.

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Sterling, R.L., Nelson, C.R. An experimental investigation of the ultimate strength of laterally constrained rock beams. Experimental Mechanics 18, 261–268 (1978). https://doi.org/10.1007/BF02324167

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  • DOI: https://doi.org/10.1007/BF02324167

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