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Keywords: stope
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Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-438
... mineralization at the Golden Giant is found along the contact of a metasedimentary rock formation with felsic metavolcanic rocks. The Golden Giant shaft is a 6 m x 4 m timber shaft with the long axis oriented east west. The shaft pillar mining area is a zone of ore that includes all stopes from 4500 4700...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-516
... reservoir geomechanics stope strength field stress ratio Rock stress Reservoir Characterization metals & mining hydraulic fracturing Upstream Oil & Gas wall stress stress ratio Rock mechanics fracture palladium principal field stress Stillwater Valley strength ratio...
Proceedings Papers

Paper presented at the Gulf Rocks 2004, the 6th North America Rock Mechanics Symposium (NARMS), June 5–9, 2004
Paper Number: ARMA-04-632
...ABSTRACT: This article demonstrates the effects of regional hard rock mining in several case studies of shallow stope cave-in failures. Applicable numerical modeling methods indicate that destressing of the rock mass is in effect under such extensive mining, which facilitates the occurrence...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0481
... dominant ground or in situations where the ground has been previously damaged by high stress. Such relaxation is often neglected in limit equilibrium calculations and in empirical design techniques. The stability of hanging walls in open stopes is of particular concern with respect to the detrimental...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0375
.... This paper presents stability analyses of an underground stope near a fault, using a recently developed non-linear model for the discontinuity. This model, called CSDS, can represent the behavior of rock discontinuities in the pre-peak as well as in the post-peak regions. A parametric investigation...
Proceedings Papers

Paper presented at the 4th North American Rock Mechanics Symposium, July 31–August 3, 2000
Paper Number: ARMA-2000-0387
... the engineering properties of the backfill, and measure the amount of stope wall closure. Data collected as three successive cuts were mined under the instrumented backfill showed stope walls converged on the backfill, inducing loads up to 3450 kPa in the fill. The backfill deformed against the top and bottom...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1951
... for the design of stope support. Attention is focused on the development of a model that takes into account the blocky nature of the typically fractured and bedded rock in the skin of such excavations; this discontinuum odel has been analysed using UDEC. The objective of this modelling is to nvestigate trends...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1911
... blasting is practised. These are: mine development, crown pillars, and preconditioning which is a technique for pre-fracmring a stope or a zone of solid rock prior to mining so that the high stresses that usually result from mining are relieved by the yielding of the preconditioned zone. SIMULATION OF CUT...
Proceedings Papers

Paper presented at the 2nd North American Rock Mechanics Symposium, June 19–21, 1996
Paper Number: ARMA-96-1929
... by the fact that rocks in the vicinity of the reef have been subsequently altered, significantly reducing cohesion across surfaces and discontinuities. Platinum and chrome mines in the Bushveld Complex, at shallow to intermediate depths, experience instability problems of stope hangingwalls and to a lesser...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-0293
... ABSTRACT ABSTRACT: In situ stope leach mining is pan of a clean mining research program designed to increase the domestic supply of metals for the United States. The U. S. Bureau of Mines (USBM) is developing this innovative mineral recovery technology to help preserve the ecosystem. The USBM...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-0911
... ABSTRACT ABSTRACT Reef and concrete stabilising pillars are modelled in the two dimensional plane strain code FLAC. The rock mechanics criteria used for comparison are hangingwall stability, pillar stress distribution and stope closure profile, as well as the punching effect of the pillar...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-0919
... ABSTRACT ABSTRACT: A stope and gully support rationale is being developed for application in tabular stopes in South African mines. At present there exists no design rationale for optimum support. Present support systems differ widely in both type and unit spacings, even under similar mining...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-0877
... ABSTRACT ABSTRACT: Mining at Mine Gaspe is carried out via longitudinal blasthole open stoping with delayed backfill. Increasing seismic activity was observed as mining progressed into the second panel. An integrated study of mine induced seismicity occurring over roughly eight months...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-0969
... ABSTRACT ABSTRACT: A detailed geomechanics study was carried out during the mining of two sill pillar stopes at Brunswick Mining. Microseismics, conventional ground control instruments, numerical modelling and visual observations were used to understand the observed failure mechanisms. Severe...
Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-0903
... ABSTRACT ABSTRACT: A discontinuum model has been developed to simulate the highly fractured rock mass around a deep level gold mine stope. The model has been used to investigate mechanisms of face bursting particularly when mining towards natural joints. Numerical simulations have been...

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