Study on Rock Burst Event Disaster and Prevention Mechanisms of Hard Roof
Joint Authors
Liu, Hengfeng
Zhang, Jixiong
Zhou, Nan
Yan, Hao
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-04-01
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
Coal mining under hard roofs is jeopardized by rock burst-induced hazards.
In this paper, mechanisms of hard roof rock burst events and key techniques for their prevention are analyzed from the standpoint of energy evolution within geological conditions typical of the hard roofs found in Chinese coal mines.
Equations used to calculate the total strain energy densities of the coal-rock mass and hard roof working face are derived.
Moreover, several failure-causing energy evolution rules are analyzed under various conditions.
Various rock roof and coal mass thicknesses and strengths are considered, and a method of preventing hard roof rock burst events is proposed.
The results obtained show that rock burst events can be facilitated by high stress concentrations, significant accumulation of strain energy in the coal-rock mass, and rapid energy release during roof breakage.
The above conditions are subdivided into two classes: energy accumulation and energy release.
The total strain energies of the coal mass and working faces in the roof are positively correlated with the roof thickness, roof strength, and coal mass strength.
The coal mass strength primarily influences the overall accumulation of energy in the working face, and it also has the largest effect on the total energy release (i.e., the earthquake magnitude).
American Psychological Association (APA)
Zhou, Nan& Liu, Hengfeng& Zhang, Jixiong& Yan, Hao. 2019. Study on Rock Burst Event Disaster and Prevention Mechanisms of Hard Roof. Advances in Civil Engineering،Vol. 2019, no. 2019, pp.1-14.
https://search.emarefa.net/detail/BIM-1116860
Modern Language Association (MLA)
Zhou, Nan…[et al.]. Study on Rock Burst Event Disaster and Prevention Mechanisms of Hard Roof. Advances in Civil Engineering No. 2019 (2019), pp.1-14.
https://search.emarefa.net/detail/BIM-1116860
American Medical Association (AMA)
Zhou, Nan& Liu, Hengfeng& Zhang, Jixiong& Yan, Hao. Study on Rock Burst Event Disaster and Prevention Mechanisms of Hard Roof. Advances in Civil Engineering. 2019. Vol. 2019, no. 2019, pp.1-14.
https://search.emarefa.net/detail/BIM-1116860
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1116860