Modal Analysis of Seismic Guided Waves in Coal Seams PDF Download
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Author: Steven D. Peterson
Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 222
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Author: Steven D. Peterson
Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 222
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Book Description
Author: L. Dresen
Publisher: Elsevier
ISBN: 1483287068
Category : Technology & Engineering
Languages : en
Pages : 446
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Book Description
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.
Author: Jeng yih Guu
Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 170
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1346
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Author:
Publisher:
ISBN:
Category : Fuel
Languages : en
Pages : 1092
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Author:
Publisher:
ISBN:
Category : Fuel
Languages : en
Pages : 1100
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Book Description
Author: A.A. Fitch
Publisher: Springer Science & Business Media
ISBN: 9780853342168
Category : Science
Languages : en
Pages : 284
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Book Description
"The first phase of geophysical exploration is carried out on the subsurface.The subsurface in this phase is inaccessible to direct observation. D.W. Strangway presents an interesting and effective method: audiofrequency magnetotelluric (AMT) sounding. In the second phase where observations can be made, D.J Buchanan writes of fault detection in coal seams, and A. Hussain writes about of gravity surveys.Other contributions include, improvement of geophysical logs by filtering and a troublesome problem which can appear in either phase of exploration-discovery and exploration of caves and abandoned mine workings.'
Author: Jeng-Yih Guu
Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 85
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Author: Australian Society of Exploration Geophysicists
Publisher:
ISBN:
Category : Prospecting
Languages : en
Pages : 558
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Book Description
Author: C. Melvin Lepper
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 26
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Book Description
