Time-dependent rock mass motion at the Homestake Mine, Lead, SD.
Brady-T; Johnson-JC; Pariseau-B; Stahl-M; Whyatt-J
2000 SME Annual Meeting, Salt Lake City, Utah, February 28 - March 1, 2000. Littleton, CO: Society for Mining, Metallurgy, and Exploration, Inc., Preprint 00-40, 2000 Feb; :1-7
An elastic-viscoplastic material model allows for time-dependent rock mass motion in proportion to excess stress above the elastic limit. The model produces rounded stair-step curves of displacement versus time that are similar to those obtained from recent borehole extensometer measurements made in the central portion of the Ross shaft pillar at the Homestake mine. The work in progress, including two- and three-dimensional finite element analyses using the UTAH2/3 codes, indicates that the model is a step towards more realistic safety and stability analysis, but that inclusion of rock mass damage may be desirable.
Mining-industry; Models; Underground-mining; Geology
2000 SME Annual Meeting, Salt Lake City, Utah, February 28 - March 1, 2000