Seismic Coal Exploration
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Seismic Coal Exploration
Author | : L. Dresen,H. Rüter |
Publsiher | : Elsevier |
Total Pages | : 446 |
Release | : 2013-10-22 |
Genre | : Technology & Engineering |
ISBN | : 9781483287065 |
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The efficient mining of hard coal in deep coal mines using highly mechanized longwall techniques requires information on the geological structure ahead of the operating face. Even minor tectonic faults with throws of only a few metres mean a loss in productivity, as they present severe working problems for underground mining equipment. Because investment costs to install a mechanized face are high, "insurance" in the form of spare capacity by both machine shifts or spare faces is uneconomic. Thus, to reduce mining costs it is essential to delineate the geology prior to mining. Today, the only effective geophysical tool to detect and to map minor faults in front of the coal cutter is in-seam seismics using channel, or so called seam waves. The techniques are well established and successfully applied for more than two decades. In-Seam Seismics covers the entire range of elementary and advanced topics in mathematics, physics and data processing of dispersive channel waves. The results of analogue and numerical modelling provide a thorough understanding of transmission, reflection, recording and interpretation of seam waves and coal seam disturbances. Fire damp proof instrumentation, target orientated underground layouts, processing and interpretation of real data impart the state-of-the-art of in-seam seismics. Selected and well-rounded case histories complete the presentation of in-seam seismics. They can help the mining engineer to come to a decision to plan and to apply in-seam seismics in case of underground mining problems. A clear text, only formulae which are necessary, many carefully designed figures, an extended list of references and a lucid index make it easy for the reader to get acquainted with seam waves or to promote the technique of in-seam seismics.
Seismic Coal Exploration
Author | : L. Dresen,H. Rüter |
Publsiher | : Unknown |
Total Pages | : 456 |
Release | : 1994 |
Genre | : Coal |
ISBN | : UOM:39015032093026 |
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Handbook of Geophysical Exploration
Author | : L. Dresen,H. Rüter |
Publsiher | : Unknown |
Total Pages | : 0 |
Release | : 1983 |
Genre | : Seismic prospecting |
ISBN | : 0080372260 |
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High resolution Seismic Reflection Techniques for Mapping Coal Seams from the Surface
Author | : C. Melvin Lepper,Frank Ruskey |
Publsiher | : Unknown |
Total Pages | : 26 |
Release | : 1976 |
Genre | : Coal mines and mining |
ISBN | : UOM:39015077583162 |
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In seam Seismic Techniques for Coal Exploration
Author | : Anonim |
Publsiher | : Unknown |
Total Pages | : 16 |
Release | : 1986 |
Genre | : Coal mines and mining |
ISBN | : 0644041749 |
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In seam Seismic Methods in Coal Exploration and Mining
Author | : P. J. Hatherly,G. E. Holt,P. F. Irwin |
Publsiher | : Unknown |
Total Pages | : 135 |
Release | : 1985 |
Genre | : Coal mines and mining |
ISBN | : 0867721774 |
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Seismic Refraction Surveys for Coal Exploration in the Homehills Hawkdun and Roxburgh Areas of Central Otago
Author | : M. Broadbent |
Publsiher | : Unknown |
Total Pages | : 56 |
Release | : 1982 |
Genre | : Coal |
ISBN | : PSU:000059280712 |
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Seismicity in Mines
Author | : G. Gibowicz |
Publsiher | : Birkhäuser |
Total Pages | : 391 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9783034892704 |
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Recent seismological research has focused on processes other than pure shear failure (double-couple) as an alternative mechanism for some types of seismic events. This has been stimulated by what appears to be anomalous focal mecha nisms observed for several earthquakes of possible volcanic nature in the 1980 Mammoth Lakes, California sequence (JULIAN and SIPKIN, 1985; SIPKIN, 1986). Although studies have concentrated on earthquakes associated with magmatic processes, possible non-double-couple seismic failure has been observed, but not widely known, in cases of mine seismicity in the past three decades. Such cases have occurred on a world-wide basis; however, no cases until now have been observed in the United States. The existence of non-double-couple failure in mine seismicity has been controversial as it has been for tectonic/volcanic earthquakes. Several of the benchmark studies of mine seismicity in the deep South African gold mines have resulted in the belief that no fundamental distinction in the source mechanism exists between tectonic earthquakes and rock bursts (MCGARR, 1984); both types of events are the result of pure shear failure. However, the reported cases of implo sional focal mechanisms for mine seismicity continue to increase in number and prolong the controversy. During the summer of 1984, a three-dimensional, high resolution micro earthquake network was operated by Woodward-Clyde Consultants (WCC) in the vicinity of two coal mines beneath Gentry Mountain in the eastern Wasatch Plateau of central Utah.