Effects of coal damage on permeability and gas drainage performance

Zheng, Chunshan, Kizil, Mehmet, Chen, Zhongwei and Aminossadati, Saiied (2017) Effects of coal damage on permeability and gas drainage performance. International Journal of Mining Science and Technology, . doi:10.1016/j.ijmst.2017.07.009


Author Zheng, Chunshan
Kizil, Mehmet
Chen, Zhongwei
Aminossadati, Saiied
Title Effects of coal damage on permeability and gas drainage performance
Journal name International Journal of Mining Science and Technology   Check publisher's open access policy
ISSN 2095-2686
2212-6066
Publication date 2017-08-08
Sub-type Article (original research)
DOI 10.1016/j.ijmst.2017.07.009
Open Access Status DOI
Total pages 4
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Abstract Coal permeability is a measure of the ability for fluids to flow through coal structures. It is one of the most important parameters affecting the gas drainage performance in underground coal mines. Despite the extensive research conducted on coal permeability, few studies have considered the effect of coal damage on permeability. This has resulted in unreliable permeability evaluation and prediction. The aim of this study is to investigate the effect of coal damage on permeability and gas drainage performance. The Cui-Bustin permeability model was improved by taking into account the impact of coal damage on permeability. The key damage coefficient of the improved permeability model is determined based on the published permeability data. A finite-element numerical simulation was then developed based on the improved permeability model to investigate the damage areas and the permeability distribution around roadway. Results showed that the tensile failure occurs mainly on the upper and lower sides of the roadway while the shear failure symmetrically occurs on the left and right sides. With the increase in the friction angle value, the damage area becomes small. A good agreement was obtained between the results of the improved permeability model (γ = 3) and the published permeability data. This indicated a more accurate permeability prediction by the improved permeability model. It is expected that the findings of this study could provide guidance for in-seam gas drainage borehole design and sealing, in order to enhance the gas drainage performance and reduce gas emissions into underground roadways.
Keyword Coal permeability
Coal damage
Improved Cui-Bustin permeability model
Gas drainage
Numerical modelling
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
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Created: Fri, 11 Aug 2017, 16:14:20 EST by Zhongwei Chen on behalf of School of Mechanical and Mining Engineering