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Keywords: dilution
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Proceedings Papers

Paper presented at the 55th U.S. Rock Mechanics/Geomechanics Symposium, June 18–25, 2021
Paper Number: ARMA-2021-1226
... ABSTRACT: Unplanned stope dilution affects the cost of open stoping mining operations. The stability graph and equivalent linear overbreak slough graph have been in use for designing the stope dimensions that minimize unplanned dilution. However, despite extensive effort made by researchers...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2021
... dilution machine learning Artificial Intelligence factor value Stability Boundary database Stability Graph acceptability criteria graph case study module 1. INTRODUCTION Stability of rock surrounding excavation is of paramount importance for underground mining activities. Mineral extraction...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0814
... stope dilution Stability Graph metals & mining calculation adjustment factor knowledge management Artificial Intelligence information database algorithm module boundary Performance Parameter MineRoc open stope case study University mawdesley stability state 1. INTRODUCTION...
Proceedings Papers

Paper presented at the 51st U.S. Rock Mechanics/Geomechanics Symposium, June 25–28, 2017
Paper Number: ARMA-2017-0531
... ABSTRACT: Hanging wall (HW) sloughage is one of the main sources of ore dilution in underground open stope mines. This paper presents the results of a series of numerical analyses performed to investigate HW sloughage potential in open stope underground mines. Hybrid DFN-3DEC models were...
Proceedings Papers

Paper presented at the 50th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2016
Paper Number: ARMA-2016-225
... Abstract: One of the challenges in Panel Caving is the amount of dilution that might be expected from exhausted levels located above the current production levels. Generally, a panel caving mine is designed for a dilution entry point (DEP) to occur at 70-90% of the recovery, but if the waste...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-431
... stability problems after mining the stope. The Mathew’s Open Stope Analysis also confirmed the potential for failure in the Back and on the South walls of the stope. The extent of sloughage obtained in numerical analysis was compared against the field data recorded in Mineability and Dilution report (MRI...
Proceedings Papers

Paper presented at the 45th U.S. Rock Mechanics / Geomechanics Symposium, June 26–29, 2011
Paper Number: ARMA-11-559
... ABSTRACT Unplanned ore dilution has a direct and large influence on the cost of a stope, and ultimately on the profitability of a mining operation. An important, sometimes overlooked, parameter affecting unplanned dilution is the local stope setting within a tabular blasthole mining sequence...
Proceedings Papers

Paper presented at the 44th U.S. Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, June 27–30, 2010
Paper Number: ARMA-10-392
... ABSTRACT: Unplanned ore dilution caused by stope wall overbreak can have severe impact on the economics of a mining operation. Parameters like rock mass properties, in situ stress regime, and stope design and construction are known to be contributory factors to ore dilution in open stope...
Proceedings Papers

Paper presented at the 43rd U.S. Rock Mechanics Symposium & 4th U.S. - Canada Rock Mechanics Symposium, June 28–July 1, 2009
Paper Number: ARMA-09-200
... Abstract Ore dilution or stope overbreak increases the cost of production and ultimately reduces the profitability of a mining operation. The adverse economic impact of ore dilution is due to the added costs associated with the mucking, haulage, crushing, hoisting, milling, and treatment...
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-06-1148
... is very significant to the behavior of the overall flow and in determining the degree of dilution that occurs from behind the ring, although the reasons for this are debatable. Many sources suggest that a shear wall of over 70 degrees slope can form behind the blasted ore in a sublevel cave mine. Using...
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-05-690
... ABSTRACT: Mining executives realize the critical nature of dilution in open stope mining and it?s effect on the bottom line. George Fisher mining operations near Mount. Isa, Queensland, Australia was experiencing average monthly dilution levels in excess of 15%, double the level predicted...
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-05-811
... ABSTRACT: The maximization of sublevel cave mining profitability requires an understanding of gravity flow and its impact on recovery and dilution. As such, this paper examines the effect that fragmentation size and differential fragmentation has on gravity flow in a sublevel cave mine...
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-05-714
... [1] rely on spot sampling to establish statistically based joint set characteristics from an infinite population. Such techniques do not provide systematic information for widely spaced large scale structures likely to contribute to dilution from stope walls (See Figure 1). Reservoir...
Proceedings Papers

Paper presented at the DC Rocks 2001, The 38th U.S. Symposium on Rock Mechanics (USRMS), July 7–10, 2001
Paper Number: ARMA-01-0409
... ABSTRACT: Stope dilution can be influenced by a number of parameters, most notably by mining-induced stress regime, the strength and structural characteristics of the host rock, and the type of stope: primary or secondary. A case study from the Bousquet mine operation is presented. Adjacent...
Proceedings Papers

Paper presented at the The 31st U.S. Symposium on Rock Mechanics (USRMS), June 18–20, 1990
Paper Number: ARMA-90-1013
... is applied at the mine. Low dilution is essential for the economic survival of the mine but at the same time the stope size should be as large as possible to obtain high productivity and low unit costs. In practice, quite extensive rock reinforcement and stress control measures are found viable if open...
Proceedings Papers

Paper presented at the The 24th U.S. Symposium on Rock Mechanics (USRMS), June 20–23, 1983
Paper Number: ARMA-83-0687
... ABSTRACT The influence of dilution on the financial viability of a massive sulphide deposit can be illustrated with the aid of the cost-volume profit concept. This concept has been applied to a current mining operation where it is known that dilution has an important influence...

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