A Static Fracturing Technology to Enhance the Permeability of Coalbed: Mechanical Study
Joint Authors
Guo, Baohua
Wang, Long
Wang, Zhaofeng
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-06-09
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Low permeability of coalbed has always been a main bottleneck impeding the safety production of coal mines and the high-efficient gas recovery.
A static fracturing technology, relied on hydraulic-driving modules to expand outwards for producing artificial fissures in coalbed, is proposed here for coalbed reservoir stimulation.
The mechanical model of borehole fracturing is established to clarify the associated mechanisms for fracturing stimulation based on the elastic-plastic mechanics.
The numerical results indicate when the fracturing load is over twice as much as in situ stress, the concentration of hoop stress around borehole would be released and the range of fracturing-induced fissures gradually extends with the rising load.
While the lateral stress coefficient of strata rising from 1 to 3, the stress distribution around borehole evolves from a ring to a saddle shape, resulting in the horizontal extension of fissures in the early stage.
According to underground monitoring, a significant improvement of coalbed permeability up to 5 times has been achieved in 16031 tailgate, in Guhanshan coalmine, China.
American Psychological Association (APA)
Wang, Long& Guo, Baohua& Wang, Zhaofeng. 2019. A Static Fracturing Technology to Enhance the Permeability of Coalbed: Mechanical Study. Advances in Civil Engineering،Vol. 2019, no. 2019, pp.1-9.
https://search.emarefa.net/detail/BIM-1117481
Modern Language Association (MLA)
Wang, Long…[et al.]. A Static Fracturing Technology to Enhance the Permeability of Coalbed: Mechanical Study. Advances in Civil Engineering No. 2019 (2019), pp.1-9.
https://search.emarefa.net/detail/BIM-1117481
American Medical Association (AMA)
Wang, Long& Guo, Baohua& Wang, Zhaofeng. A Static Fracturing Technology to Enhance the Permeability of Coalbed: Mechanical Study. Advances in Civil Engineering. 2019. Vol. 2019, no. 2019, pp.1-9.
https://search.emarefa.net/detail/BIM-1117481
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1117481