Radiation in uranium mines A manual of radon gas emission characteristics and techniques for estimating ventilating air requirements PART 3

Abstract Part 1 of this paper, published in the September issue, covered the occurrence of uranium, radiation from uranium ores, the uranium series, radioactive theory, radioactive equilibrium and application to the radon series, the working level, the theory of emanation and diffusion, transport by thermal diffusion of radon emanating from porous rocks, and definitions.
The October issue carried Part 2, which dealt with radiation theory applied to uranium ores, other radon migration factors, factors affecting the radon gas release rate, the measurement of radon gas emanation rates, the tunnel concept, variation of emanation rate with grade and estimating radioactivity from grade analysis.
Part 3, in this issue, concludes the series by discussing the techniques for controlling radiation and providing some example calculations.
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Publication: CIM Bulletin
Author(s): G. KOLLBERG
Issue: 847
Volume: 75
Year: 1982
Text
Summary: The paper outlines the history of rubber mill liners beginning with the awarding of the first North A merican patent righ ts in 1923. It includes the early-day applications and installations of the 1920s and 1930s through to their present-day application. Over-all rubber mill liner design is discussed in relation to present-day installations employing rubber mill liners in various grinding applications. A brief overview is given of a manufacturer's procedures to produce rubber mill liners.
Publication: CIM Bulletin
Author(s): LUDWIG M. STRAH
Keywords: Equipment, Maintenance, Mill liners, Rubber liners, Grinding, Grates, Mineral processing.
Issue: 847
Volume: 75
Year: 1982
Text
Summary: This paper begins with a brief history of Madawaska Mines, a brief description of the geology, mining methods and equipment, and the historical development of 7/8-in. tapered drilling equipment. It then outlines the performance characteristics and inherent problems of the traditional 12-degree, tapered-connection, blade-type insert bits. Service-free (Unipass) button-type insert bits are presented as a possible solution to these problems. The paper concludes with an analysis of button bit...
Publication: CIM Bulletin
Author(s): R.M. GIEGERICH
Keywords: Underground Mining, Equipment, Maintenance, Drilling, Madawaska Mines, Bits, Button bits, Insert bits.
Issue: 847
Volume: 75
Year: 1982
Text
Summary: Some progress has already been made in defining the parameters which will determine the performance of a guidance system in a mine shaft. Very little information is available, however, to help designers or operators predict the effects of varying these parameters in new or existing installations.
The experience we have gained from monitoring a variety of installations has led to the development of a model which simulates the motion of a conveyance as it moves through a mineshaft, restrained...
Publication: CIM Bulletin
Author(s): L.C. GALLOWAY, P.M. TILEY
Keywords: Underground mining, Equipment, Maintenance, Shafts, Mine shafts, Guidance systems, Accelerometers, Mines d'amiante Bell Ltee, Lanigan Mine, Brunswick Mining and Smelting, Skips, Hoists.
Issue: 847
Volume: 75
Year: 1982
Text
Summary: Given the properties, locations and quantities of material to be hauled and the dump locations and capacities, the designer wishes to select the type and number of trucks and loading equipment required. Accordingly, software is being developed to assist in creation of the equipment, material and road network data bases, in selection of equipment, materials and road networks from these data bases, and in evaluation of the expected productivities both in a rapid, non-interactive, approximate...
Publication: CIM Bulletin
Author(s): LK. NENONEN
Keywords: Equipment, Modelling, Computers, Trucks, Haulage systems, Loading, Open-pit mining, Road networks.
Issue: 847
Volume: 75
Year: 1982
Text
Summary: Some progress has already been made in defining the parameters which will determine the performance of a guidance system in a mine shaft. Very little information is available, however, to help designers or operators predict the effects of varying these parameters in new or existing installations.
The experience we have gained from monitoring a variety of installations has led to the development of a model which simulates the motion of a conveyance as it moves through a mineshaft, restrained...
Publication: CIM Bulletin
Author(s): L.C. GALLOWAY, P.M. TILEY
Keywords: Underground mining, Equipment, Maintenance, Shafts, Mine shafts, Guidance systems, Accelerometers, Mines d'amiante Bell Ltee, Lanigan Mine, Brunswick Mining and Smelting, Skips, Hoists.
Issue: 847
Volume: 75
Year: 1982
Text
Summary: An interactive computer simulation model of conveyor systems used in oil sands mining has been developed to aid in the selection of mining equipment and the evaluation of operating policies. The materials handling links between supply points, such as bucket-wheel excavators and draglines, and demand points such as bins and extraction plants are modelled in such a way that the conveyor model can be interfaced with any combination of these equipment submodels. Detailed calculations of the power...
Publication: CIM Bulletin
Author(s): A.W. CHAN
Keywords: Equipment, Modelling, Computers, Conveyors, Oil sands, Materials handling, Simulation.
Issue: 847
Volume: 75
Year: 1982
Text
Summary: Various aspects of processing ferro-manganese fines generated during the crushing of standard ferro-manganese have been studied in laboratory-scale plasma furnaces. These laboratory furnaces are based on the use of conventional graphite electrodes rather than water-cooled non-consumable torch devices. The reactor system has separate, distinct zones for pre-heating, melting and smelting. This unique feature assists in the removal of undesirable elements from the molten alloy. Ferro-manganese...
Publication: CIM Bulletin
Author(s): D.K.A. DONYINA, A. McLEAN, R.S. SEGSWORTH
Keywords: Steelmaking, Manganese, Ferro-manganese, Flash reactors, Crushing, Plasma furnaces, Graphite electrodes, Alloys, Silicon, Carbon, Phosphorous, Sulphur.
Issue: 847
Volume: 75
Year: 1982
Text
Summary: At the CIM Annual General Meeting in Quebec City, R.E. Pike of The Toronto-Dominion Bank described how the Canadian banking industry worked with the minerals industry to assemble the large capital requirements for resource projects in Canada and overseas. He developed a profile of the mining industry and Canadian banking, both being important sectors of the Canadian economy and global in context. He also outlined the banking and financing partnership that existed in the past. In looking to...
Publication: CIM Bulletin
Author(s): RONALD E. PIKE
Issue: 847
Volume: 75
Year: 1982
Text
Summary: In 1980, J.S. Redpath Limited were retained by Dickenson Mines Limited to increase hoisting capacity from 700 to 1000 tons per day. The hoisting capacity of the present skip-over-cage system could not be increased significantly through design modifications. The other constraint was a minimum of disruption to the current production. The Dickenson shaft was a three-compartment shaft from surface to the 8th level and four compartments before the 8th to the 23rd level. The solution to the problem...
Publication: CIM Bulletin
Author(s): J.R. PRONOVOST, D.W. WATTS, P.M. TILEY
Keywords: Equipment, Maintenance, Friction hoists, Drum hoists, Hoisting, Dickenson Mine, Limited, Shafts, Safety.
Issue: 847
Volume: 75
Year: 1982
Text
Summary: In 1980, J.S. Redpath Limited were retained by Dickenson Mines Limited to increase hoisting capacity from 700 to 1000 tons per day. The hoisting capacity of the present skip-over-cage system could not be increased significantly through design modifications. The other constraint was a minimum of disruption to the current production. The Dickenson shaft was a three-compartment shaft from surface to the 8th level and four compartments before the 8th to the 23rd level. The solution to the problem...
Publication: CIM Bulletin
Author(s): J.R. PRONOVOST, D.W. WATTS
Keywords: Equipment, Maintenance, Friction hoists, Drum hoists, Hoisting, Dickenson Mine, Limited, Shafts, Safety.
Issue: 847
Volume: 75
Year: 1982
Text
Summary: An interactive computer model of a dragline, windrow and spoil pile has been developed for modelling oil sands mining operations. The model is to be used in conjunction with models of other oil sands mining equipment, such as bucket-wheel excavators and reclaimers, conveyors, hoppers, bins, trucks and shovels, to study mining operations on a minute-by-minute basis. From the orebody description and mining selectivity, layers of ore and reject are determined and mined by the dragline. Reject is...
Publication: CIM Bulletin
Author(s): P.W. UDO GRAEFE
Keywords: Equipment, Modelling, Computers, Draglines, Windrows, Spoil piles, Oil sands, Open-pit mining, Strip mining.
Issue: 847
Volume: 75
Year: 1982
Text
Summary: In recent years, the major effort in detonator development has been concentrated on "non-electric" systems. Existing types all involve some form of explosive reaction to transfer ignition energy from outside the borehole to the pyrotechnic delay element contained within the detonator. These may be based on low-energy detonating cords having grained or plasticized explosive cores, shock tube energy transmission principals and explosive gas ignition systems. Each has properties of...
Publication: CIM Bulletin
Author(s): W.B. MORREY
Keywords: Magnadet, Initiation systems, Electric initiation systems, Blasting, Explosives, Detonators, Equipment, Transformer coupling.
Issue: 847
Volume: 75
Year: 1982
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