NDLI: Modeling of the equivalent permeability for an underground coal fire zone, Xinjiang region, China

Content Provider	Springer Nature Link
Author	Zeng, Qiang Tiyip, Tashpolat Wuttke, Manfred W. Guan, Wei ming
Copyright Year	2015
Abstract	Underground coal fires (UCFs) constitute severe disasters, yet the quantification of the process of coal fire propagation, the first step in knowing how to extinguish a UCF, remains a great challenge even after decades of research. An important feature for understanding oxygen supply to a coal fire is the permeability of the UCF zone. Here, we propose a model for a typical UCF zone based on an analysis of the deformation of the overlying rocks caused by the UCF. We delineate the physical boundaries of the UCF and show how the zone includes both porous media and fractured zones. We then attempted to quantify the permeability of these porous and fractured zones and use the quantitative model to design, build, and employ an elementary UCF air/smoke flow experimental apparatus to run a permeability experiment. Subsequent to the experiments, we used simulation software to build a numerical model of the experimental apparatus. Calculated results from the numerical model agreed reasonably well with results from the physical experiments, though for this model to be applied in practice to quantify UCF propagation, further research on problems such as the size and distribution of the fractures and the relationship between the fractures and stress in the rock matrix will be required.
Starting Page	957
Ending Page	971
Page Count	15
File Format	PDF
ISSN	0921030X
Journal	Natural Hazards
Volume Number	78
Issue Number	2
e-ISSN	15730840
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-06-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Underground coal fire Porous and fractured medium UCF zone model Air/smoke flow model Equivalent permeability Natural Hazards Hydrogeology Geophysics/Geodesy Geotechnical Engineering & Applied Earth Sciences Civil Engineering Environmental Management
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science Water Science and Technology

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