Underground Coal Mine Methane Displacement by Injecting Low-pressure Gas into the Meta-anthracite Seam: Laboratory and Field Tests
Because of the strong adsorption capacity of meta-anthracite, the gas content of a meta-anthracite seam can be as high as 10 m3/t, with a gas pressure lower than 0.74 MPa; this results in low efficiency of gas extraction in underground mines. To enhance low-pressure methane extraction efficiency i...
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| Format: | Article |
| Language: | English |
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Eastern Macedonia and Thrace Institute of Technology
2014-09-01
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| Series: | Journal of Engineering Science and Technology Review |
| Subjects: | |
| Online Access: | http://www.jestr.org/downloads/Volume7Issue4/fulltext97414.pdf |
| _version_ | 1818334359535484928 |
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| author | Yu Hong Feng Tao Zhang Ruilin Liu Jie |
| author_facet | Yu Hong Feng Tao Zhang Ruilin Liu Jie |
| author_sort | Yu Hong |
| collection | DOAJ |
| description | Because of the strong adsorption capacity of meta-anthracite, the gas content of a meta-anthracite seam can be as high as
10 m3/t, with a gas pressure lower than 0.74 MPa; this results in low efficiency of gas extraction in underground mines.
To enhance low-pressure methane extraction efficiency in meta-anthracite seams, a new approach – methane
displacement by gas injection – has been developed, investigated in the laboratory, and then applied in the field in the
Fuyanshan coal mine. Laboratory results show that when the gas content of the coal seam is high, methane displacement
by nitrogen injection is difficult. The volume of methane displaced is directly related to the pressure difference between
the coal seam gas pressure and the injection gas pressure. If the total gas pressure is greater than 0.5 MPa after nitrogen
injection, then the methane displacement efficiency will be greatly enhanced. It is also confirmed that the displacement
efficiency can be improved by injecting inert gas to change the partial pressure of the methane. Field test data show quite
good methane displacement efficiency. |
| first_indexed | 2024-12-13T14:06:17Z |
| format | Article |
| id | doaj.art-d73b59babe9f4a9f8380e954bb7313c8 |
| institution | Directory Open Access Journal |
| issn | 1791-2377 1791-2377 |
| language | English |
| last_indexed | 2024-12-13T14:06:17Z |
| publishDate | 2014-09-01 |
| publisher | Eastern Macedonia and Thrace Institute of Technology |
| record_format | Article |
| series | Journal of Engineering Science and Technology Review |
| spelling | doaj.art-d73b59babe9f4a9f8380e954bb7313c82022-12-21T23:42:36ZengEastern Macedonia and Thrace Institute of TechnologyJournal of Engineering Science and Technology Review1791-23771791-23772014-09-01745358Underground Coal Mine Methane Displacement by Injecting Low-pressure Gas into the Meta-anthracite Seam: Laboratory and Field TestsYu Hong0Feng Tao1Zhang Ruilin2Liu Jie31 School of Resource and Safety Engineering, Central South University, Changsha 410083, China 2 School of Safety Engineering, Henan Institute of Engineering, Zhengzhou 451191, China 3 The Cultivation Base of College and University Key Laboratory of Henan Province, China 4 Key Laboratory of Safe Mining Techniques Of Coal Mines, School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaKey Laboratory of Safe Mining Techniques Of Coal Mines, School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaSchool of Safety Engineering, Henan Institute of Engineering, Zhengzhou 451191, China / The Cultivation Base of College and University Key Laboratory of Henan Province, ChinaUniversity of Kentucky, Lexington, KY 40506–0046, U.S.A.Because of the strong adsorption capacity of meta-anthracite, the gas content of a meta-anthracite seam can be as high as 10 m3/t, with a gas pressure lower than 0.74 MPa; this results in low efficiency of gas extraction in underground mines. To enhance low-pressure methane extraction efficiency in meta-anthracite seams, a new approach – methane displacement by gas injection – has been developed, investigated in the laboratory, and then applied in the field in the Fuyanshan coal mine. Laboratory results show that when the gas content of the coal seam is high, methane displacement by nitrogen injection is difficult. The volume of methane displaced is directly related to the pressure difference between the coal seam gas pressure and the injection gas pressure. If the total gas pressure is greater than 0.5 MPa after nitrogen injection, then the methane displacement efficiency will be greatly enhanced. It is also confirmed that the displacement efficiency can be improved by injecting inert gas to change the partial pressure of the methane. Field test data show quite good methane displacement efficiency.http://www.jestr.org/downloads/Volume7Issue4/fulltext97414.pdfmeta-anthraciteextractionsubstitutionadsorptiongas injection |
| spellingShingle | Yu Hong Feng Tao Zhang Ruilin Liu Jie Underground Coal Mine Methane Displacement by Injecting Low-pressure Gas into the Meta-anthracite Seam: Laboratory and Field Tests Journal of Engineering Science and Technology Review meta-anthracite extraction substitution adsorption gas injection |
| title | Underground Coal Mine Methane Displacement by Injecting Low-pressure Gas into the Meta-anthracite Seam: Laboratory and Field Tests |
| title_full | Underground Coal Mine Methane Displacement by Injecting Low-pressure Gas into the Meta-anthracite Seam: Laboratory and Field Tests |
| title_fullStr | Underground Coal Mine Methane Displacement by Injecting Low-pressure Gas into the Meta-anthracite Seam: Laboratory and Field Tests |
| title_full_unstemmed | Underground Coal Mine Methane Displacement by Injecting Low-pressure Gas into the Meta-anthracite Seam: Laboratory and Field Tests |
| title_short | Underground Coal Mine Methane Displacement by Injecting Low-pressure Gas into the Meta-anthracite Seam: Laboratory and Field Tests |
| title_sort | underground coal mine methane displacement by injecting low pressure gas into the meta anthracite seam laboratory and field tests |
| topic | meta-anthracite extraction substitution adsorption gas injection |
| url | http://www.jestr.org/downloads/Volume7Issue4/fulltext97414.pdf |
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