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Essentials of rock drill designCummings, Lister Merriken, January 1940 (has links) (PDF)
Thesis (Professional Degree)--University of Missouri, School of Mines and Metallurgy, 1940. / The entire thesis text is included in file. Typescript. Title from title screen of thesis/dissertation PDF file (viewed February 22, 2010)
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A study of penetration by percussive drills.Ong, Chin Guan. January 1971 (has links)
No description available.
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Full-scale diamond-bit drilling in the laboratory.Dellinger, Thomas Baynes. January 1970 (has links)
Thesis (Ph.D.)--University of Tulsa, 1970. / Bibliography: leaves 49-51.
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The measurement of compressed air and its consumption in rock drillsSherry, Homer Kent. Porri, William. January 1912 (has links) (PDF)
Thesis (M.S.)--University of Missouri, School of Mines and Metallurgy, 1912. / The entire thesis text is included in file. Typescript. Illustrated by authors. Title from title screen of thesis/dissertation PDF file (viewed March 26, 2009)
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Numerical modeling of tool-rock interaction in laminated formations /Ouyang, Hsien-Ju. January 1990 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Includes bibliographical references (leaves 82-84). Also available via the Internet.
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Modeling PDC cutter rock interactionTulu, Ihsan Berk. January 2009 (has links)
Thesis (M.S.)--West Virginia University, 2009. / Title from document title page. Document formatted into pages; contains xi, 69 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 67-69).
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A comparative test of the air consumption of rock drillsSchultz, John Elmer. Miller, Christian R. January 1911 (has links) (PDF)
Thesis (B.S.)--University of Missouri, School of Mines and Metallurgy, 1911. / The entire thesis text is included in file. Typescript. Illustrated by authors. Title from title screen of thesis/dissertation PDF file (viewed February 27, 2009)
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Study of the effect of underground drilling environments on the noise produced by percussive rock drillsHigginson, John Francis January 1973 (has links)
The aim of the investigation is to identify and interrelate particular parameters that influence the magnitude of noise levels to which rock drillers are subjected. The percussive rock drill is known to be an excessively noisy machine. Currently, exhaust mufflers and other silencing devices are being developed but as yet acceptable noise levels have not been established. The definition of acceptable sound power levels for drills must recognize that the sound levels to which the drill operator is exposed are modified by the acoustic properties of the working environment.
For the initial phase of the investigation a representative rock drill was selected as a noise source. Comparative sound levels generated by this machine were measured in a free field environment and in typical underground working places. Increases in the sound pressure levels in each octave band from 63 to 16,000 hertz were observed when the drill was operated in both stopes and drifts.
For the subsequent phase of the investigation, studies were conducted on an assortment of commercially available rock drills. The changes in measured sound levels have been related to:
the acoustic properties of the working place,
the drill position relative to the walls,
the length of drill steel exposed from the hole, and
the drill air supply pressure.
Based on the measurements taken throughout the investigation, sound pressure level correction factors are proposed. By applying these factors to sound levels generated under free field conditions, predictions of rock drill sound pressure levels present in underground working places can be made. In addition, when studies of rock drill noise levels in various operating configurations are being conducted, use of the factors permits reduction of observed sound level measurements to a common datum. / Applied Science, Faculty of / Mining Engineering, Keevil Institute of / Graduate
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Water flushing of rock chips from horizontal holes drilled by rotary percussion.Kilfoil, Arthur Mark January 1997 (has links)
A project report submitted to the Faculty of Engineering,
University of the Witwatersrand, Johannesburg, in partial
fulfilment of the requirements for the degree of Master
of Science in Engineering. / The flushing flow rate required to maximise penetration
rate of holes drilled by rotary percussion is dependant
on drilling parameters and chip size. Experimental work
to determine the optimal flushing water flow rate for two
common drilling situations was undertaken. It consisted
of drilling, analysis of chip samples and flow
visualization. A computer modal to predict flow rate was
developed. Its output and the experimental results Were
combined to explain the relationship between penetration
rate and flow rate.
All chips should be fiushed from the gap between the bit
and the end of the hole in the time between hammer blows
(ie. - within the duration of a percussion cycle). As
flow rate increases, flushing improves and therefore
penetration rate increases. Once flushing is adequate
there is no mechanism for further increases in
penetration rate, thus it remains constant and
independent of further increases in flow. / Andrew Chakane 2018
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A study of penetration by percussive drills.Ong, Chin Guan. January 1971 (has links)
No description available.
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