Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole
Joint Authors
Source
Advances in Materials Science and Engineering
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-08-02
Country of Publication
Egypt
No. of Pages
14
Abstract EN
To improve coal seam gas drainage performance, we developed a double-expansive (DE) material to seal the borehole.
The swelling process of this material includes an initial swelling stage and a secondary swelling stage.
We studied the swelling pressure properties of the DE material under four constraint conditions using a self-made swelling test device.
Further, the active support effect of the DE material on the borehole was analyzed by simulating borehole stability with COMSOL Multiphysics software.
The results exhibit the following: (1) The swelling pressure of the DE material exhibits time-dependent behavior, and the mathematical relationship between the swelling pressure and time can be obtained by nonlinear fitting.
(2) The radial swelling potential is principally formed during the secondary swelling stage, providing the main active support on the radial constraint.
(3) The active support imposed on the hole wall can prevent the extension of plastic and damage regions around the borehole, for improved stability of the gas drainage borehole.
Finally, field tests demonstrate improved gas drainage performance of the borehole sealed by the DE material compared to a conventional sealing material.
American Psychological Association (APA)
Wang, Zhiming& Sun, Yuning. 2018. Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole. Advances in Materials Science and Engineering،Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1121961
Modern Language Association (MLA)
Wang, Zhiming& Sun, Yuning. Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole. Advances in Materials Science and Engineering No. 2018 (2018), pp.1-14.
https://search.emarefa.net/detail/BIM-1121961
American Medical Association (AMA)
Wang, Zhiming& Sun, Yuning. Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole. Advances in Materials Science and Engineering. 2018. Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1121961
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1121961