Three-dimensional analysis of a shaft pillar at the Homestake mine.
Pariseau-WG; Johnson-JC; Orr-SA
Rock Mechanics: Contributions and Challenges: Proceedings of the 31st U.S. Symposium, June 18-20, 1990, Colorado School of Mines, Golden, Colorado. Hustrulid WA, Johnson GA, ed., Brookfield, VT: A.A. Balkema, 1990 Jan; :529-536
Two-dimensional numerical analyses of ground motion in response to mining are almost routine and may provide useful guidance for design. However, a review of assumptions implicit in such analyses reveals important limitations that lead to a need for three-dimensional models. Stoping in the vicinity of a shaft and the design of shaft pillars is an important, industry-wide example of such a problem. The potential benefits of reliable three-dimensional analysis of shaft pillars are considerable. In this regard, the U.S. Bureau of Mines in cooperative research with the Homestake Mining Company and the University of Utah has demonstrated that is indeed feasible to construct a three-dimensional finite-element model that meets criteria for numerical reliability and that includes important rock mechanics features such as dipping, anisotropic formations, and old stopes. The research reveals the strengths and shortcomings of present rock mechanics technology in the realm of numerical modeling and indicates where there is a need for improvement in order to advance applications to mining. In particular, computer software in rock mechanics, especially mesh generation capability for ore body geology and mining geometry, has not kept pace with advances in computer speed and reductions in cost of analysis.
Mining-industry; Underground-mining; Rock-bursts; Rock-falls; Rock-mechanics; Models; Mathematical-models; Computer-models; Computer-software; Mine-shafts; Structural-analysis; Analytical-models; Analytical-instruments; Geophysics; Physical-properties; Ground-control; Ground-stability
OP; Conference/Symposia Proceedings
Rock Mechanics: Contributions and Challenges: Proceedings of the 31st U.S. Symposium, June 18-20, 1990, Colorado School of Mines, Golden, Colorado