Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/116636
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Type: Journal article
Title: Permeability enhancement performance and its control factors by auger mining of extremely thin coal seams
Author: Yuan, Y.
Chen, Z.
Xu, C.
Zhang, X.
Wei, H.
Citation: Journal of Geophysics and Engineering, 2018; 15(6):2626-2641
Publisher: IOP Publishing
Issue Date: 2018
ISSN: 1742-2132
1742-2140
Statement of
Responsibility: 
Yong Yuan, Zhongshun Chen, Chaoshui Xu, Xinwang Zhang and Hongmin Wei
Abstract: In order to improve both the pressure relief in deep coal mining and the permeability of coal seams for gas drainage, the auger mining (AM) method was proposed for mining extremely thin coal seams underneath a major coal seam to enhance its permeability and improve its pressure relief for subsequent major mining. The method was applied to Chiyu Coal Mine in China as a case study. Based on the geological conditions of the mine, the influences of AM parameters such as AM width, intermediate coal pillar width and distance between adjacent temporary wide pillars on the pressure distributions and permeability enhancement were studied in detail and the optimal set of parameters for the mining operation were obtained. Based on our simulations, it was found that using the proposed method with the optimal parameters derived, the permeability of the upper protected coal layer will increase by more than 671 times the initial permeability. This demonstrated that the proposed new AM method is effective for the purposes of pressure relief and permeability enhancement in the protected major coal layer.
Keywords: Extremely thin coal seams; permeability enhancement; auger mining; temporary wide pillars, intermediate coal pillar
Rights: © 2018 Sinopec Geophysical Research Institute
RMID: 0030102311
DOI: 10.1088/1742-2140/aae068
Appears in Collections:Civil and Environmental Engineering publications

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