Numerical modeling approach of failure modes for cemented backfill sill mats.
Caceres-C; Pakalnis-R; Hughes-P; Brady-T
Rock Mechanics: Meeting Society's Challenges and Demands, Volume 2: Case Histories. Proceedings of the 1st Canada-US Rock Mechanics Symposium, May 27-31 2007 Vancouver, Canada. Eberhardt EB, Stead D, Morrison T, eds., London: Taylor & Francis, 2007 May; 2:1575-1580
Cemented backfill sill mats are an artificial pillar used to improve recovery by replacing an ore pillar by an artificial equivalent. In the design of a sill mat pillar, one should account for the driving forces in terms of the self weight of the sill mat plus the load of unconsolidated backfill used to fill the mined stope above it that results upon undermining the sill mat below. The resisting forces are largely governed by the strength properties of the cemented sill mat. This paper presents stability charts derived using numerical codes incorporating variable stope dip angles, sill mat thicknesses and strength properties of the cemented backfill and relating the results to limit equilibrium analytical equations presently in use.
Mining-industry; Underground-mining; Ground-control; Ground-stability; Engineering-controls; Mathematical-models; Computer-models
Eberhardt-EB; Stead-D; Morrison-T
Rock Mechanics: Meeting Society's Challenges and Demands. Proceedings of the 1st Canada-US Rock Mechanics Symposium, May 27-31 2007 Vancouver, Canada.