Investigating the effect of fractures on unusual gas emission in coal mines; case study of Parvadeh coal mine, Iran
In the present study, an investigation was carried out on Parvadeh coal mine in Tabas, Iran, to survey the effect of fractures on unusual methane gas emission in coal mines. This coal mine was chosen for investigating because of its high methane gas content in the coal body and available data from s...
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| Format: | Article |
| Language: | English |
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University of Tehran
2016-12-01
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| Series: | International Journal of Mining and Geo-Engineering |
| Subjects: | |
| Online Access: | http://ijmge.ut.ac.ir/article_59824_83004f1bbbb3eff3aa255ae1b420e837.pdf |
| _version_ | 1818983084158091264 |
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| author | Ehsan Farahbakhsh Mohammad Pourjafari Lohrasb Faramarzi Taymor Eslamkish |
| author_facet | Ehsan Farahbakhsh Mohammad Pourjafari Lohrasb Faramarzi Taymor Eslamkish |
| author_sort | Ehsan Farahbakhsh |
| collection | DOAJ |
| description | In the present study, an investigation was carried out on Parvadeh coal mine in Tabas, Iran, to survey the effect of fractures on unusual methane gas emission in coal mines. This coal mine was chosen for investigating because of its high methane gas content in the coal body and available data from sensors in desired locations. Gas concentration monitoring programs were carried out at the mine site and a large amount of data were collected and analyzed. It is revealed that there is a good correlation between excavating fracture-bearing faces and high methane gas emission events at the mine site. High gas emissions have been observed before, during, or after excavating fracture-bearing faces. When gas content is high and all boundary conditions are met, rockbursts, faults movement and also mining activities can trigger unusual gas emission, and sometimes the gas gushes are violent enough to fit into the category of gas outbursts. Since the fracture generation is happening before the increase of gas concentration in the air, a sensitive and highly accurate microseismic monitoring system can be used to detect locations of rock fracturing, thus provide an effective means to issue warnings of high gas emission in the working area. |
| first_indexed | 2024-12-20T17:57:29Z |
| format | Article |
| id | doaj.art-4a4d037f101a4ecfb7ad900e771273cd |
| institution | Directory Open Access Journal |
| issn | 2345-6930 2345-6949 |
| language | English |
| last_indexed | 2024-12-20T17:57:29Z |
| publishDate | 2016-12-01 |
| publisher | University of Tehran |
| record_format | Article |
| series | International Journal of Mining and Geo-Engineering |
| spelling | doaj.art-4a4d037f101a4ecfb7ad900e771273cd2022-12-21T19:30:43ZengUniversity of TehranInternational Journal of Mining and Geo-Engineering2345-69302345-69492016-12-0150216316810.22059/ijmge.2016.5982459824Investigating the effect of fractures on unusual gas emission in coal mines; case study of Parvadeh coal mine, IranEhsan Farahbakhsh0Mohammad Pourjafari1Lohrasb Faramarzi2Taymor Eslamkish3Department of Mining & Metallurgical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, IranDepartment of Mining & Metallurgical Engineering, Yazd University, Yazd, IranDepartment of Mining Engineering, Isfahan University of Technology, Isfahan, IranDepartment of Mining & Metallurgical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, IranIn the present study, an investigation was carried out on Parvadeh coal mine in Tabas, Iran, to survey the effect of fractures on unusual methane gas emission in coal mines. This coal mine was chosen for investigating because of its high methane gas content in the coal body and available data from sensors in desired locations. Gas concentration monitoring programs were carried out at the mine site and a large amount of data were collected and analyzed. It is revealed that there is a good correlation between excavating fracture-bearing faces and high methane gas emission events at the mine site. High gas emissions have been observed before, during, or after excavating fracture-bearing faces. When gas content is high and all boundary conditions are met, rockbursts, faults movement and also mining activities can trigger unusual gas emission, and sometimes the gas gushes are violent enough to fit into the category of gas outbursts. Since the fracture generation is happening before the increase of gas concentration in the air, a sensitive and highly accurate microseismic monitoring system can be used to detect locations of rock fracturing, thus provide an effective means to issue warnings of high gas emission in the working area.http://ijmge.ut.ac.ir/article_59824_83004f1bbbb3eff3aa255ae1b420e837.pdfCoal mineFractureGas outburstParvadehUnusual methane gas emission |
| spellingShingle | Ehsan Farahbakhsh Mohammad Pourjafari Lohrasb Faramarzi Taymor Eslamkish Investigating the effect of fractures on unusual gas emission in coal mines; case study of Parvadeh coal mine, Iran International Journal of Mining and Geo-Engineering Coal mine Fracture Gas outburst Parvadeh Unusual methane gas emission |
| title | Investigating the effect of fractures on unusual gas emission in coal mines; case study of Parvadeh coal mine, Iran |
| title_full | Investigating the effect of fractures on unusual gas emission in coal mines; case study of Parvadeh coal mine, Iran |
| title_fullStr | Investigating the effect of fractures on unusual gas emission in coal mines; case study of Parvadeh coal mine, Iran |
| title_full_unstemmed | Investigating the effect of fractures on unusual gas emission in coal mines; case study of Parvadeh coal mine, Iran |
| title_short | Investigating the effect of fractures on unusual gas emission in coal mines; case study of Parvadeh coal mine, Iran |
| title_sort | investigating the effect of fractures on unusual gas emission in coal mines case study of parvadeh coal mine iran |
| topic | Coal mine Fracture Gas outburst Parvadeh Unusual methane gas emission |
| url | http://ijmge.ut.ac.ir/article_59824_83004f1bbbb3eff3aa255ae1b420e837.pdf |
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