Assessment of Effectiveness of Methods and Techniques for Degassing Methane-containing Coal Seams
The findings of review of promising methods and techniques providing increasing effectiveness of degassing of coal seams containing methane in the process of their underground mining are presented. Based on the review findings, traditional methods and techniques of degassing were identified, the eff...
| Main Author: | |
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| Format: | Article |
| Language: | English |
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National University of Science and Technology MISiS
2019-06-01
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| Series: | Горные науки и технологии |
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| Online Access: | https://mst.misis.ru/jour/article/view/143 |
| _version_ | 1818299412097531904 |
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| author | S. N. Shirjaev |
| author_facet | S. N. Shirjaev |
| author_sort | S. N. Shirjaev |
| collection | DOAJ |
| description | The findings of review of promising methods and techniques providing increasing effectiveness of degassing of coal seams containing methane in the process of their underground mining are presented. Based on the review findings, traditional methods and techniques of degassing were identified, the effectiveness of which is 12–25 %, as well as unconventional methods providing methane degassing of up to 40%. As a classification feature of the unconventional methods and techniques of gaseous methane liberation, a condition of decreasing pressure and increasing temperature of coal matrix containing solid gas hydrate has been adopted. The conditions for methane transition from gas hydrate to free gas taking into account actual mining and technogenic conditions of the mines have been identified. Given the difficulty of supplying additional thermal energy into a coal seam, as the main way to reduce pressure in the seam, unloading of the rock mass relative to the initial stress state, and disruption of coal and rocks in the course of transition from their elastic deformation to elastic-plastic and out-of-limit deformation are accepted. |
| first_indexed | 2024-12-13T04:50:48Z |
| format | Article |
| id | doaj.art-f7b809de90874c3da94c0968395c07ce |
| institution | Directory Open Access Journal |
| issn | 2500-0632 |
| language | English |
| last_indexed | 2024-12-13T04:50:48Z |
| publishDate | 2019-06-01 |
| publisher | National University of Science and Technology MISiS |
| record_format | Article |
| series | Горные науки и технологии |
| spelling | doaj.art-f7b809de90874c3da94c0968395c07ce2022-12-21T23:59:01ZengNational University of Science and Technology MISiSГорные науки и технологии2500-06322019-06-014212213110.17073/2500-0632-2019-2-122-131Assessment of Effectiveness of Methods and Techniques for Degassing Methane-containing Coal SeamsS. N. Shirjaev0LLC "Raspadskaya Coal Company"The findings of review of promising methods and techniques providing increasing effectiveness of degassing of coal seams containing methane in the process of their underground mining are presented. Based on the review findings, traditional methods and techniques of degassing were identified, the effectiveness of which is 12–25 %, as well as unconventional methods providing methane degassing of up to 40%. As a classification feature of the unconventional methods and techniques of gaseous methane liberation, a condition of decreasing pressure and increasing temperature of coal matrix containing solid gas hydrate has been adopted. The conditions for methane transition from gas hydrate to free gas taking into account actual mining and technogenic conditions of the mines have been identified. Given the difficulty of supplying additional thermal energy into a coal seam, as the main way to reduce pressure in the seam, unloading of the rock mass relative to the initial stress state, and disruption of coal and rocks in the course of transition from their elastic deformation to elastic-plastic and out-of-limit deformation are accepted.https://mst.misis.ru/jour/article/view/143coal seammethanecollierydegassinggas hydraterock pressuredesorptionfiltrationrock disruptiongas contentcoal matrix |
| spellingShingle | S. N. Shirjaev Assessment of Effectiveness of Methods and Techniques for Degassing Methane-containing Coal Seams Горные науки и технологии coal seam methane colliery degassing gas hydrate rock pressure desorption filtration rock disruption gas content coal matrix |
| title | Assessment of Effectiveness of Methods and Techniques for Degassing Methane-containing Coal Seams |
| title_full | Assessment of Effectiveness of Methods and Techniques for Degassing Methane-containing Coal Seams |
| title_fullStr | Assessment of Effectiveness of Methods and Techniques for Degassing Methane-containing Coal Seams |
| title_full_unstemmed | Assessment of Effectiveness of Methods and Techniques for Degassing Methane-containing Coal Seams |
| title_short | Assessment of Effectiveness of Methods and Techniques for Degassing Methane-containing Coal Seams |
| title_sort | assessment of effectiveness of methods and techniques for degassing methane containing coal seams |
| topic | coal seam methane colliery degassing gas hydrate rock pressure desorption filtration rock disruption gas content coal matrix |
| url | https://mst.misis.ru/jour/article/view/143 |
| work_keys_str_mv | AT snshirjaev assessmentofeffectivenessofmethodsandtechniquesfordegassingmethanecontainingcoalseams |