Study on Permeability Improvement Technology by Injecting Air into the Gas Drainage Borehole in Low-Permeability Coal Seam
Gas extraction cycle is too long in low-permeability coal seam. In order to solve the problem, the basic principle about gas drainage drilling for gas injection technology is studied to increase permeability. And the mathematical model is established. Gas is injected into the low-permeability coal s...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/1912383 |
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| _version_ | 1832562512444260352 |
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| author | Li Hui Guo Chengwei Sun Yuanfang Guo Shaoshuai |
| author_facet | Li Hui Guo Chengwei Sun Yuanfang Guo Shaoshuai |
| author_sort | Li Hui |
| collection | DOAJ |
| description | Gas extraction cycle is too long in low-permeability coal seam. In order to solve the problem, the basic principle about gas drainage drilling for gas injection technology is studied to increase permeability. And the mathematical model is established. Gas is injected into the low-permeability coal seam by numerical simulation. The results indicate that the best condition is a negative pressure drainage at 26 kPa and a gas injection pressure at 0.6 MPa in the vertical direction and in the horizontal direction of the injection hole. In Shanxi Daping Coal Mine 3113 working face, the field test is implemented. As a result, the test is successful. During the 14 d gas injection constantly, gas content of coal seam is reduced from 12.33 m3/t to 7.12 m3/t, greatly reducing the risk of coal and gas outburst elimination time required. |
| format | Article |
| id | doaj-art-0d62668baa9245179fee7bd5011a301f |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-0d62668baa9245179fee7bd5011a301f2025-02-03T01:22:20ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/19123831912383Study on Permeability Improvement Technology by Injecting Air into the Gas Drainage Borehole in Low-Permeability Coal SeamLi Hui0Guo Chengwei1Sun Yuanfang2Guo Shaoshuai3School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, ChinaSchool of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, ChinaSchool of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, ChinaSchool of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, ChinaGas extraction cycle is too long in low-permeability coal seam. In order to solve the problem, the basic principle about gas drainage drilling for gas injection technology is studied to increase permeability. And the mathematical model is established. Gas is injected into the low-permeability coal seam by numerical simulation. The results indicate that the best condition is a negative pressure drainage at 26 kPa and a gas injection pressure at 0.6 MPa in the vertical direction and in the horizontal direction of the injection hole. In Shanxi Daping Coal Mine 3113 working face, the field test is implemented. As a result, the test is successful. During the 14 d gas injection constantly, gas content of coal seam is reduced from 12.33 m3/t to 7.12 m3/t, greatly reducing the risk of coal and gas outburst elimination time required.http://dx.doi.org/10.1155/2018/1912383 |
| spellingShingle | Li Hui Guo Chengwei Sun Yuanfang Guo Shaoshuai Study on Permeability Improvement Technology by Injecting Air into the Gas Drainage Borehole in Low-Permeability Coal Seam Advances in Civil Engineering |
| title | Study on Permeability Improvement Technology by Injecting Air into the Gas Drainage Borehole in Low-Permeability Coal Seam |
| title_full | Study on Permeability Improvement Technology by Injecting Air into the Gas Drainage Borehole in Low-Permeability Coal Seam |
| title_fullStr | Study on Permeability Improvement Technology by Injecting Air into the Gas Drainage Borehole in Low-Permeability Coal Seam |
| title_full_unstemmed | Study on Permeability Improvement Technology by Injecting Air into the Gas Drainage Borehole in Low-Permeability Coal Seam |
| title_short | Study on Permeability Improvement Technology by Injecting Air into the Gas Drainage Borehole in Low-Permeability Coal Seam |
| title_sort | study on permeability improvement technology by injecting air into the gas drainage borehole in low permeability coal seam |
| url | http://dx.doi.org/10.1155/2018/1912383 |
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