![](/images/graphics-bg.png)
The Static Breaking Technique for Sustainable and Eco-Environmental Coal Mining
Joint Authors
Bing-yuan, Hao
Hui, Huang
Zi-jun, Feng
Kai, Wang
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-06-03
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Medicine
Information Technology and Computer Science
Abstract EN
The initiating explosive devices are prohibited in rock breaking near the goaf of the highly gassy mine.
It is effective and applicable to cracking the hard roof with static cracking agent.
By testing the static cracking of cubic limestone (size: 200 × 200 × 200 mm) with true triaxial rock mechanics testing machine under the effect of bidirectional stress and by monitoring the evolution process of the cracks generated during the acoustic emission experiment of static cracking, we conclude the following: the experiment results of the acoustic emission show that the cracks start from the lower part of the hole wall until they spread all over the sample.
The crack growth rate follows a trend of “from rapidness to slowness.” The expansion time is different for the two bunches of cracks.
The growth rates can be divided into the rapid increasing period and the rapid declining period, of which the growth rate in declining period is less than that in the increasing period.
Also, the growth rate along the vertical direction is greater than that of the horizontal direction.
Then the extended model for the static cracking is built according to the theories of elastic mechanics and fracture mechanics.
Thus the relation formula between the applied forces of cracks and crack expansion radius is obtained.
By comparison with the test results, the model proves to be applicable.
In accordance with the actual geological situation of Yangquan No.
3 Mine, the basic parameters of manpower manipulated caving breaking with static crushing are settled, which reaps bumper industrial effects.
American Psychological Association (APA)
Bing-yuan, Hao& Hui, Huang& Zi-jun, Feng& Kai, Wang. 2014. The Static Breaking Technique for Sustainable and Eco-Environmental Coal Mining. The Scientific World Journal،Vol. 2014, no. 2014, pp.1-10.
https://search.emarefa.net/detail/BIM-1048899
Modern Language Association (MLA)
Bing-yuan, Hao…[et al.]. The Static Breaking Technique for Sustainable and Eco-Environmental Coal Mining. The Scientific World Journal No. 2014 (2014), pp.1-10.
https://search.emarefa.net/detail/BIM-1048899
American Medical Association (AMA)
Bing-yuan, Hao& Hui, Huang& Zi-jun, Feng& Kai, Wang. The Static Breaking Technique for Sustainable and Eco-Environmental Coal Mining. The Scientific World Journal. 2014. Vol. 2014, no. 2014, pp.1-10.
https://search.emarefa.net/detail/BIM-1048899
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1048899