Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole
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 constr...
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| Format: | Article |
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/8245036 |
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| author | Zhiming Wang Yuning Sun |
| author_facet | Zhiming Wang Yuning Sun |
| author_sort | Zhiming Wang |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-9125c90b021941f4b999891d7c200c3e |
| institution | DOAJ |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-9125c90b021941f4b999891d7c200c3e2025-08-20T03:20:33ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/82450368245036Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage BoreholeZhiming Wang0Yuning Sun1School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454002, ChinaSchool of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454002, ChinaTo 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.http://dx.doi.org/10.1155/2018/8245036 |
| spellingShingle | Zhiming Wang Yuning Sun Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole Advances in Materials Science and Engineering |
| title | Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole |
| title_full | Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole |
| title_fullStr | Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole |
| title_full_unstemmed | Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole |
| title_short | Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole |
| title_sort | swelling pressure of double expansive material and its active support effect for coal seam gas drainage borehole |
| url | http://dx.doi.org/10.1155/2018/8245036 |
| work_keys_str_mv | AT zhimingwang swellingpressureofdoubleexpansivematerialanditsactivesupporteffectforcoalseamgasdrainageborehole AT yuningsun swellingpressureofdoubleexpansivematerialanditsactivesupporteffectforcoalseamgasdrainageborehole |