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Power reduction of mine ventilation fans /Beswick, Michael Unknown Date (has links)
Thesis (MEng)--University of South Australia, 1998
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Power reduction of mine ventilation fans /Beswick, Michael Unknown Date (has links)
Thesis (MEng)--University of South Australia, 1998
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Flow visualisation and model experiments in mine ventilation.Parker, Donald Charles Douglas. January 1968 (has links)
No description available.
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A study of factors influencing the cooling of rock surrounding mine airways.Kathage, B. A. Unknown Date (has links)
No description available.
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Program-assisted analysis of the transverse pressure capacity of block stoppings for mine ventilation controlBatchler, Timothy J. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2008. / Title from document title page. Document formatted into pages; contains xv, 121 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 79-81) and index.
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Determination of resistance across development section return stoppingsGandy, James R. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 1998. / Title from document title page. "December 1998." Document formatted into pages; contains vi, 110 p. : ill. Includes abstract. Includes bibliographical references (p. 65).
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Development of new protocols to evaluate the transverse loading of mine ventilation stoppingsBarczak, Thomas M. January 1900 (has links)
Thesis (M.S.)--West Virginia University, 2004. / Title from document title page. Document formatted into pages; contains xiii, 86 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 66-67).
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Evaluation of the transverse load capacity of block stoppings for mine ventilation controlBarczak, Thomas M. January 1900 (has links)
Thesis (Ph. D.)--West Virginia University, 2005. / Title from document title page. Document formatted into pages; contains xli, 402 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 332-333).
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Optimization of subsurface ventilation systems - application of genetic algorithmsYang, Zhi-Yuan January 1998 (has links)
No description available.
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Maximizing capacity of underground mine water chilling machines rejecting heat into a limited supply of water pumped to surfaceWright, Clifford Dale 26 July 2016 (has links)
A project report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Science in Engineering.
Johannesburg, 2016 / Underground chilling installations have an important role in deep mining operations because the total cost of cooling a mine is minimized when underground machines deliver as high a proportion of the required cooling as practicable. Thus the refrigerating load of an underground installation should be maximized to the extent permitted both by the environment in which the installation operates, and by the physical characteristics of the machines in the installation. This study analyses how, and to what extent, the refrigerating load of older, already installed water chilling machines rejecting heat into a limited supply of return water may be maximized through configuration of their water circuits and capacity control of their compressors. Multiple-machine installations are simulated in a range of scenarios, using the thermodynamically efficient series-counterflow arrangement, to predict both the potential maximum refrigerating load and the expected refrigerating load of such installations. The simulation results indicate significant potential for installations to chill water more efficiently and thus deliver larger, maximized, refrigerating loads. For scenarios where a larger-than-design flowrate of return water is available, so permitting machines to be operated with little or no capacity control, the simulated chilling efficiency and thus the expected refrigerating loads tend toward, and in some cases almost match, the potential maximum values. For simulations in which compressor capacity control is used to prevent the return water temperature from exceeding its maximum permitted value, expected refrigerating loads fall short of their potential values, by varying amounts, due to the low machine cycle efficiency caused largely by reduced compressor isentropic efficiency at part load. For a limited supply of return water for heat rejection, the simulations indicate that load maximization efforts should focus on the machines in an installation being connected in a series-counterflow arrangement and operated, as far as practicable, at or near full capacity to create the best prospect for approaching potential maximum refrigerating load.
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