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Keywords: ventilation raise
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Proceedings Papers

Paper presented at the Golden Rocks 2006, The 41st U.S. Symposium on Rock Mechanics (USRMS), June 17–21, 2006
Paper Number: ARMA-06-991
... ABSTRACT ABSTRACT: Special foamed cements were used to stabilize and secure caving ground in a newly-reamed 3.8 m (12.5-ft) diameter underground ventilation raise. Two zones of very poor Rock Mass Rating (RMR) material were encountered during reaming of a ventilation raise at Placer Dome?s...
Proceedings Papers

Paper presented at the Alaska Rocks 2005, The 40th U.S. Symposium on Rock Mechanics (USRMS), June 25–29, 2005
Paper Number: ARMA-05-892
... metals & mining orientation hydraulic fracturing field data Rock mechanics ventilation shaft contribution representation Artificial Intelligence reinforcement variability striking north machine learning individual fracture ventilation raise largest number unstable wedge...
Proceedings Papers

Paper presented at the The 34th U.S. Symposium on Rock Mechanics (USRMS), June 28–30, 1993
Paper Number: ARMA-93-0613
... the field stresses in the rock. A similar experiment was conducted in the ventilation raise at the URL. The experiment consisted of overcoring four resistance strain gauge rosettes located on the surface of a bored ventilation raise employing a procedure similar to that of Brady et al. [2] (Figure 1...

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