Controls on coal cleat spacing

Dawson, G.K.W. and Esterle, J.S. (2010) Controls on coal cleat spacing. International Journal of Coal Geology, 82 3-4: 213-218. doi:10.1016/j.coal.2009.10.004


Author Dawson, G.K.W.
Esterle, J.S.
Title Controls on coal cleat spacing
Journal name International Journal of Coal Geology   Check publisher's open access policy
ISSN 0166-5162
Publication date 2010
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.coal.2009.10.004
Volume 82
Issue 3-4
Start page 213
End page 218
Total pages 6
Editor Suzanne D. Golding
Victor Rudolph
Romeo M. Flores
Publisher Elsevier
Collection year 2010
Language eng
Subject 0403 Geology
D Environment
C1
Abstract This study was undertaken to determine the relationship between cleat spacing, cleat height and coal banding texture for Queensland Permian age coals of different rank, four of which are presented here. Whereas relationships between cleat frequency and rank, and with coal type or grade, have been reported in the past, relationships between the spacing and height among the different kinds of cleats are not quantitatively established. For other layered sedimentary rocks, joint or fracture spacing relates directly to both bed thickness and rock strength. Coal is similar to other layers rocks. Four major classes of cleats were distinguished, which were separate data populations when cleat spacing was plotted against cleat height; master cleats, single vitrain layer cleats, multiple vitrain layer package cleats, and durain (dull coal) cleats. Understanding the relationship between cleat height and spacing for specific coals, and the specific kinds of cleats within those coals, will lead to more accurate predictions of cleat density and hence coal permeability. This can improve modelling and prediction of methane gas deliverability in coal seams. In the Australian Permian coals studied, narrowly spaced cleats exist at all ranks, but the distribution of cleat spacing with cleat height is what varies for specific cleat classes. Cleat spacing was found to be directly proportional to cleat height in most cases.
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
2010 Higher Education Research Data Collection
 
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Created: Wed, 21 Apr 2010, 16:26:57 EST by Tracy Paroz on behalf of School of Earth Sciences