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A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway
Joint Authors
Qiao, Qing
Li, Xiaobin
Li, Xinyuan
Li, YiWei
Gong, Haoran
Pan, Weidong
Source
Advances in Materials Science and Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-10-19
Country of Publication
Egypt
No. of Pages
15
Abstract EN
In coal underground mining, situation of longwall face striding across (SAR) or passing through roadway (PTR) is very common, especially in an inclined coal seam mining.
A roadway supporting design method, consisting of a model using to determine the minimal rock strata thickness and a segmental supporting scheme, is developed.
In addition, to represent the mechanical behaviour of the caved material authentically, an elastic model was developed.
The results showed that the elastic model has a good agreement with the caved material mechanical behaviours at a relatively lower stress condition.
By using a FDEM method, a real case in Xutuan coal mine is studied.
Compared with the process without backfill, the z-displacement of cross-cut roof decreased shapely after backfilling, with a maximum z-displacement, decreases from 0.76 m to 0.13 m and from 0.39 m to 0.064 m in PTR and SAR section, respectively.
Therefore, the possibility of fall of ground (FOG) and crushing accidents can be reduced effectively with backfilling material of wood cribs.
And the maximum subsidence (SAR section side) of face floor is 0.16 m, which is small enough to ensure normal production.
The results of this study are likely to be useful as a reference for the safe and efficient mining of coal resources under similar conditions.
American Psychological Association (APA)
Pan, Weidong& Li, Xinyuan& Li, YiWei& Li, Xiaobin& Qiao, Qing& Gong, Haoran. 2020. A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-15.
https://search.emarefa.net/detail/BIM-1129463
Modern Language Association (MLA)
Pan, Weidong…[et al.]. A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-15.
https://search.emarefa.net/detail/BIM-1129463
American Medical Association (AMA)
Pan, Weidong& Li, Xinyuan& Li, YiWei& Li, Xiaobin& Qiao, Qing& Gong, Haoran. A Supporting Design Method When Longwall FaceStrides across and Passes through a Roadway. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-15.
https://search.emarefa.net/detail/BIM-1129463
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1129463