A NEW SYSTEM FOR RAPID AND ACCURATE DETERMINATION OF GAS CONTENT IN COAL

World Mining Congress

L. Yuan

National Engineering Research Centre of Coal Mine Gas Control

Huainan, China 232001

*S. Xue and J. Xie

CSIRO Earth Science and Resource Engineering

PO Box 883, Kenmore, QLD, Australia, 4069

(*Corresponding author: sheng.xue@csiro.au)

In underground coal mining operations, gas content in a coal seam is used to assess the risk of coal and gas outbursts. To estimate the gas content, a number of systems have been developed, however issues remain about the rapidness and accuracy of these systems. To address these issues, a new and improved system has been developed that includes a sampling-while-drilling unit for coal sampling, a coal canister, an underground-based portable measurement unit, a surface-based measurement apparatus, and gas content calculation software. The system has been successfully applied in underground coal mines at Huainan, China. This new, rapid and accurate system, its main components and field trials are described in this paper.
Keywords: Coal; Systems; Desorption; Boreholes; Sampling; Coal samples; Drills; Drill; Coal seams;
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