A Practical Nonprobabilistic Reliability Assessment Method on Key Strata Shear Failure in Longwall Mining
Joint Authors
Zhang, Ke
Luan, Hebing
Wang, Jiachen
Ma, Guowei
Source
Mathematical Problems in Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-06-04
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Roof cutting has long been a potential hazard factor in longwall panels in some diggings in China.
Meanwhile, the key strata structural reliability, which provides an assessment on the stability of overlying roof strata, may be a significant reference for support design in underground coal mines.
This paper aims to investigate a practical nonprobabilistic reliability assessment method on key strata.
The mechanical tests and the hollow inclusion triaxial strain tests were conducted to measure relevant mechanical parameters and in situ stress.
Furthermore, against the typical failure features in Datong Diggings, China, a shear failure mechanical model of key strata is proposed.
Then, an allowable-safety-factor based nonprobabilistic stability probability assessment method is given.
The sensitivity of geometrical dimensions and uncertainty levels of friction angle and cohesion are further studied.
It is found that thickness and span of key strata have more dominative effect on key strata’s stability compared with the other factor and the increase of uncertainty levels results in decrease of stability probability.
American Psychological Association (APA)
Luan, Hebing& Wang, Jiachen& Ma, Guowei& Zhang, Ke. 2015. A Practical Nonprobabilistic Reliability Assessment Method on Key Strata Shear Failure in Longwall Mining. Mathematical Problems in Engineering،Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1074976
Modern Language Association (MLA)
Luan, Hebing…[et al.]. A Practical Nonprobabilistic Reliability Assessment Method on Key Strata Shear Failure in Longwall Mining. Mathematical Problems in Engineering No. 2015 (2015), pp.1-8.
https://search.emarefa.net/detail/BIM-1074976
American Medical Association (AMA)
Luan, Hebing& Wang, Jiachen& Ma, Guowei& Zhang, Ke. A Practical Nonprobabilistic Reliability Assessment Method on Key Strata Shear Failure in Longwall Mining. Mathematical Problems in Engineering. 2015. Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1074976
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1074976