Fault and fracture zone detection based on soil gas mapping and gamma ray survey at the extension site of an open pit coal mine

Ma, Ye, Bringemeier, Detlef, Scheuermann, Alexander, Molebatsi, Tiro and Li, Ling (2012). Fault and fracture zone detection based on soil gas mapping and gamma ray survey at the extension site of an open pit coal mine. In: Proceedings of the 2012 Coal Operators' Conference. 2012 Coal Operators' Conference, Wollongong, NSW, Australia, (379-387). 16-17 February 2012.

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Author Ma, Ye
Bringemeier, Detlef
Scheuermann, Alexander
Molebatsi, Tiro
Li, Ling
Title of paper Fault and fracture zone detection based on soil gas mapping and gamma ray survey at the extension site of an open pit coal mine
Conference name 2012 Coal Operators' Conference
Conference location Wollongong, NSW, Australia
Conference dates 16-17 February 2012
Proceedings title Proceedings of the 2012 Coal Operators' Conference
Journal name Proceedings of the 2012 Coal Operators' Conference
Place of Publication Wollongong, Australia
Publisher The University of Wollongong Printery
Publication Year 2012
Sub-type Fully published paper
ISBN 9781921522574
Start page 379
End page 387
Total pages 9
Collection year 2013
Language eng
Formatted Abstract/Summary
Identification of open active faults and fracture zones is a part of exploration study prior to
mining operation. However, detailed mapping of geological discontinuities in an otherwise low
permeable overburden is rarely carried out in the mining area. To develop a rapid and feasible survey
method, a field campaign was conducted to examine different soil gas survey methods along three
transects at the Carrington West Wing extension site of a coal mine, Hunter River Valley, NSW,
Australia. Coal seam gas together with Uranium-238 (present in the gas-bearing coal seam) increases
the soil gas signal which can be detected with suitable soil gas mapping methods. Three techniques
associated with four parameters were tested at the field site. A conventional active soil gas sampling
method was applied with the samples analysed off-site in the lab by gas chromatography for carbon
dioxide and methane concentrations. Radon was measured on site by means of radon detector. It
was expected that high soil gas concentration anomalies, if detected, could then be related to the
locations of permeable fault/ fracture zones. A rapid and simple technique was used to determine the
relative counts of Bismuth-214 in the soil surface by employing a gamma ray spectrometer. As a decay
product of the 222Rn, 214Bi is also expected to exhibit relatively higher activities in the soil over faults and
fracture zone.
Q-Index Code E1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Research Online is the open access institutional repository for the University of Wollongong

Document type: Conference Paper
Collections: School of Civil Engineering Publications
Official 2013 Collection
 
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Created: Wed, 07 Mar 2012, 14:36:10 EST by Julie Hunter on behalf of School of Civil Engineering