Effect of air column in transport canisters on measured gas contents of coal

Aziz, N. and Mirzaghorbanali, A. ORCID: https://orcid.org/0000-0002-7967-9233 (2017) Effect of air column in transport canisters on measured gas contents of coal. Journal of Mining and Environment, 8 (1). pp. 1-9. ISSN 2251-8592


Canister desorption is a widely used technique to measure the gas content of coal. The gas content data, when normalized to volume/weight and multiplied by coal seam mass, is used to estimate the gas in place in an area around the cored hole. However, the gas content and the percentage of each constituent are likely to be influenced by trapped air in the canister at the time of the coal enclosure and subsequent sealing. Freshly-cored coal samples were collected from three mines, mining coal from Bulli seam, Sydney Basin. The studied underground mines were Appin West, West Cliff, and Tahmoor. The research programme, spanning for a period of four years, focused only on the influence of the trapped air in the canister on the coal gas percentage of each constituent. It was found that the percentage of each coal gas constituent was influenced by the trapped air in the canister space. The effect of trapped air was extended to the component percentage of the gases in the crushed coal samples, normally used for the estimation of Q3.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Article is freely available from publisher's website, at the indicated URL.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 29 Apr 2019 03:16
Last Modified: 30 May 2019 03:38
Uncontrolled Keywords: air column, canister, gas contents, coal
Fields of Research (2008): 04 Earth Sciences > 0403 Geology > 040309 Petroleum and Coal Geology
09 Engineering > 0914 Resources Engineering and Extractive Metallurgy > 091405 Mining Engineering
Fields of Research (2020): 37 EARTH SCIENCES > 3705 Geology > 370508 Resource geoscience
40 ENGINEERING > 4019 Resources engineering and extractive metallurgy > 401905 Mining engineering
Identification Number or DOI: doi:10.22044/jme.2016.631
URI: http://eprints.usq.edu.au/id/eprint/36339

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