Effects of coal properties on ventilation air leakage into methane gas drainage borehole: application of the orthogonal design

Zheng, Chunshan, Kizil, Mehmet S., Chen, Zhongwei and Aminossadati, Saiied M. (2017) Effects of coal properties on ventilation air leakage into methane gas drainage borehole: application of the orthogonal design. Journal of Natural Gas Science and Engineering, 45 88-95. doi:10.1016/j.jngse.2017.05.005


Author Zheng, Chunshan
Kizil, Mehmet S.
Chen, Zhongwei
Aminossadati, Saiied M.
Title Effects of coal properties on ventilation air leakage into methane gas drainage borehole: application of the orthogonal design
Journal name Journal of Natural Gas Science and Engineering   Check publisher's open access policy
ISSN 1875-5100
2212-3865
Publication date 2017-09-01
Sub-type Article (original research)
DOI 10.1016/j.jngse.2017.05.005
Open Access Status Not yet assessed
Volume 45
Start page 88
End page 95
Total pages 8
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Language eng
Abstract Ventilation air leakage into underground to inseam drainage boreholes is a common issue observed during gas drainage in underground coal mines. This air leakage adversely affects the gas drainage efficiency. Despite the extensive research conducted on air-leakage prevention strategies, the effects of coal properties on the air leakage has not yet been properly investigated. This paper presents a fully-coupled numerical study on the effects of coal properties such as Young's modulus, Poisson's ratio and porosity on the air leakage into drainage boreholes. This was achieved through an integrated approach of the orthogonal design method and the F-test theory. The results show that there is a direct correlation between the Young's modulus and the amount of air leakage. Furthermore, the F-test theory was used to examine the significance of the above-mentioned properties’ effects. It is found that the impact of Young's modulus on the air leakage is the most significant among those three properties. The Poisson's ratio is the next significant factor with an inversely proportional relationship. Porosity is found to have the least effect on the air leakage. This study provides a systematic approach to examine the air leakage performance for various site conditions and coal properties. Research outcomes offer the mining researchers and engineers a guidance to develop appropriate leakage-prevention strategies and enhance gas drainage performance.
Keyword Ventilation air leakage into borehole
Coupled permeability model
Orthogonal design
Sensitivity analysis
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: Mon, 12 Jun 2017, 21:45:45 EST by Dr Saiied Aminossadati on behalf of School of Mechanical and Mining Engineering