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Keywords: intersection
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Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-039
...Static and Dynamic Considerations in Rock Engineering, Brummer (ed.) © 1990 Balkema, Rotterdam. ISBN 90 6191 1532 Roof behaviour in roadways and intersections of South African collieries Andre Vervoort Coal Mining, COMRO, South Africa ABSTRACT: Three successive periods of strata movement in...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-013
... ABSTRACT: Wedges of rock are defined when two joints intersect each other in the vicinity of an excavation. Due to the variability of joint length, spacing and strength, probability methods are required to estimate the frequency of failure of wedges in a rock slope. The point estimate method...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-020
.... While high compressive stresses and strains would cause problems in a shaft pillar, total extraction of the near shaft reef will result in a dislocation to the line of the shaft at the reef intersection and the shaft axis is placed in a state of induced tension. Three dimensional boundary element...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 12–16, 1988
Paper Number: ISRM-IS-1988-005
... intersection with the cylindrical volume of infinitesi- mal cross section, and whose generatrices are normal to that mean attitude (the vol- ume corresponding to the above mentioned segment), which is bigger than the cylinder cross section. The occurrence of partial intersections can be di sregarded, due to...

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