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Pressure-Arching Characteristics in Roof Blocks during Shallow Coal Mining
Joint Authors
Zou, Zhengsheng
Wang, Shuren
Hagan, Paul
Zhao, Yanhai
Ren, Lianwei
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-09-16
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
To reveal the performance of the stepped subsidence and the strong roof weighting during shallow coal mining, taking the fully mechanized mining face with large mining height in the Shendong mining area in China as the engineering background, theoretical analysis and numerical simulation were used to analyze the pressure-arching effect of the hanging roof blocks.
Three typical pressure-arch models of the roof structure were proposed, such as the symmetrical pressure-arch of two key blocks, the step pressure-arch of multiple key blocks, and the rotative pressure-arch of multiple key blocks.
Results indicate that the horizontal stress displays a nonlinear distribution at the abutments of the symmetrical pressure-arch, and there is a linear distribution of horizontal stress with a higher peak value at the midspan of the pressure-arch.
The high horizontal stress at the arch abutment is necessary to form the rotative pressure-arch of multiple key blocks.
The horizontal stress is relatively less at the arch abutment of the step pressure-arch structure.
The main key block is easier to slide in this structure as the boundary horizontal stresses display the nonlinear distribution.
The results are of instructive significance for roof weighting forecast and strata control during shallow horizontal mining for a thick coal seam.
American Psychological Association (APA)
Zhao, Yanhai& Wang, Shuren& Hagan, Paul& Ren, Lianwei& Zou, Zhengsheng. 2018. Pressure-Arching Characteristics in Roof Blocks during Shallow Coal Mining. Advances in Civil Engineering،Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1116439
Modern Language Association (MLA)
Zhao, Yanhai…[et al.]. Pressure-Arching Characteristics in Roof Blocks during Shallow Coal Mining. Advances in Civil Engineering No. 2018 (2018), pp.1-12.
https://search.emarefa.net/detail/BIM-1116439
American Medical Association (AMA)
Zhao, Yanhai& Wang, Shuren& Hagan, Paul& Ren, Lianwei& Zou, Zhengsheng. Pressure-Arching Characteristics in Roof Blocks during Shallow Coal Mining. Advances in Civil Engineering. 2018. Vol. 2018, no. 2018, pp.1-12.
https://search.emarefa.net/detail/BIM-1116439
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1116439