Research on the Stability Evaluation Model of Composite Support Pillar in Backfill-Strip Mining
Joint Authors
Zhu, Xiaojun
Guo, Guangli
Liu, Hui
Peng, Xueni
Yang, Xiaoyu
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-02-18
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Backfill-strip mining, which combines the advantages of strip mining and backfill mining, is proposed to overcome high cost and shortage of filling materials in coal mines at present.
The composite support pillar (CSP) is a combined support pillar of the filling body and coal pillar for supporting the overlying strata and achieving subsidence control.
The stability of CSP is the key to the success of subsidence control in backfill-strip mining engineering.
A stability evaluation model of the CSP mechanical model was proposed.
First, the lateral stress between the coal pillar and filling body is calculated in consideration of their interaction relation in CSP based on the earth pressure theory.
Then, the width calculation models of the broken and plastic zones of three types of CSPs are established on the basis of limit equilibrium theory.
On this basis, the mathematical model of the safety design width of the three types of CSPs is proposed to ensure the stability of CSP.
Meanwhile, an engineering case of stability width design of CSP is shown.
This study can provide theoretical reference and technical support for the engineering design of backfill-strip mining.
American Psychological Association (APA)
Zhu, Xiaojun& Guo, Guangli& Liu, Hui& Peng, Xueni& Yang, Xiaoyu. 2020. Research on the Stability Evaluation Model of Composite Support Pillar in Backfill-Strip Mining. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1194214
Modern Language Association (MLA)
Zhu, Xiaojun…[et al.]. Research on the Stability Evaluation Model of Composite Support Pillar in Backfill-Strip Mining. Mathematical Problems in Engineering No. 2020 (2020), pp.1-11.
https://search.emarefa.net/detail/BIM-1194214
American Medical Association (AMA)
Zhu, Xiaojun& Guo, Guangli& Liu, Hui& Peng, Xueni& Yang, Xiaoyu. Research on the Stability Evaluation Model of Composite Support Pillar in Backfill-Strip Mining. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-11.
https://search.emarefa.net/detail/BIM-1194214
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1194214