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Numerical Analysis of Stress Fields and Crack Growths in the Floor Strata of Coal Seam for Longwall Mining
Joint Authors
Xie, Yunyue
Xiao, Hongtian
Sun, Lingzhi
Source
Mathematical Problems in Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-08-15
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
This paper predicts the possibility of water inrush from a confined aquifer under the action of mining activities and water pressure.
The study uses numerical analyses to evaluate stress redistribution and crack growth which result from coal extraction operations.
Two models are presented in this study.
By simplifying the distribution of the disturbed vertical stress on the coal seam and floor around a working face, a model is established to analyze the additional stresses in the floor strata induced by mining activities.
And some distribution features of all the additional stress components are described.
By using the superposition principle in fracture mechanics, another model is developed to analyze the crack growth in the floor strata under the action of disturbed stresses and water pressure.
And the stress intensity factors at the crack tip are presented and the process of crack growth is obtained in the advancement of a working face.
Because of discretizing only loading areas and crack surfaces, the present methods can obtain the accurate numerical results.
Finally, some suggestions are made for preventing the water inrush from a confined aquifer.
American Psychological Association (APA)
Sun, Lingzhi& Xie, Yunyue& Xiao, Hongtian. 2018. Numerical Analysis of Stress Fields and Crack Growths in the Floor Strata of Coal Seam for Longwall Mining. Mathematical Problems in Engineering،Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1207250
Modern Language Association (MLA)
Sun, Lingzhi…[et al.]. Numerical Analysis of Stress Fields and Crack Growths in the Floor Strata of Coal Seam for Longwall Mining. Mathematical Problems in Engineering No. 2018 (2018), pp.1-12.
https://search.emarefa.net/detail/BIM-1207250
American Medical Association (AMA)
Sun, Lingzhi& Xie, Yunyue& Xiao, Hongtian. Numerical Analysis of Stress Fields and Crack Growths in the Floor Strata of Coal Seam for Longwall Mining. Mathematical Problems in Engineering. 2018. Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1207250
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1207250