The Effect of a Tectonic Stress Field on Coal and Gas Outbursts
Coal and gas outbursts have always been a serious threat to the safe and efficient mining of coal resources. Ground stress (especially the tectonic stress) has a notable effect on the occurrence and distribution of outbursts in the field practice. A numerical model considering the effect of coal gas...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/813063 |
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| author | Fenghua An Yuanping Cheng |
| author_facet | Fenghua An Yuanping Cheng |
| author_sort | Fenghua An |
| collection | DOAJ |
| description | Coal and gas outbursts have always been a serious threat to the safe and efficient mining of coal resources. Ground stress (especially the tectonic stress) has a notable effect on the occurrence and distribution of outbursts in the field practice. A numerical model considering the effect of coal gas was established to analyze the outburst danger from the perspective of stress conditions. To evaluate the outburst tendency, the potential energy of yielded coal mass accumulated during an outburst initiation was studied. The results showed that the gas pressure and the strength reduction from the adsorbed gas aggravated the coal mass failure and the ground stress altered by tectonics would affect the plastic zone distribution. To demonstrate the outburst tendency, the ratio of potential energy for the outburst initiation and the energy consumption was used. Increase of coal gas and tectonic stress could enhance the potential energy accumulation ratio, meaning larger outburst tendency. The component of potential energy for outburst initiation indicated that the proportion of elastic energy was increased due to tectonic stress. The elastic energy increase is deduced as the cause for a greater outburst danger in a tectonic area from the perspective of stress conditions. |
| format | Article |
| id | doaj-art-a0da666d744f4a1d9ed48ee3beff551e |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-a0da666d744f4a1d9ed48ee3beff551e2025-02-03T01:21:52ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/813063813063The Effect of a Tectonic Stress Field on Coal and Gas OutburstsFenghua An0Yuanping Cheng1National Engineering Research Center for Coal & Gas Control, Faculty of Safety Engineering, China University of Mining & Technology, Xuzhou 221116, ChinaNational Engineering Research Center for Coal & Gas Control, Faculty of Safety Engineering, China University of Mining & Technology, Xuzhou 221116, ChinaCoal and gas outbursts have always been a serious threat to the safe and efficient mining of coal resources. Ground stress (especially the tectonic stress) has a notable effect on the occurrence and distribution of outbursts in the field practice. A numerical model considering the effect of coal gas was established to analyze the outburst danger from the perspective of stress conditions. To evaluate the outburst tendency, the potential energy of yielded coal mass accumulated during an outburst initiation was studied. The results showed that the gas pressure and the strength reduction from the adsorbed gas aggravated the coal mass failure and the ground stress altered by tectonics would affect the plastic zone distribution. To demonstrate the outburst tendency, the ratio of potential energy for the outburst initiation and the energy consumption was used. Increase of coal gas and tectonic stress could enhance the potential energy accumulation ratio, meaning larger outburst tendency. The component of potential energy for outburst initiation indicated that the proportion of elastic energy was increased due to tectonic stress. The elastic energy increase is deduced as the cause for a greater outburst danger in a tectonic area from the perspective of stress conditions.http://dx.doi.org/10.1155/2014/813063 |
| spellingShingle | Fenghua An Yuanping Cheng The Effect of a Tectonic Stress Field on Coal and Gas Outbursts The Scientific World Journal |
| title | The Effect of a Tectonic Stress Field on Coal and Gas Outbursts |
| title_full | The Effect of a Tectonic Stress Field on Coal and Gas Outbursts |
| title_fullStr | The Effect of a Tectonic Stress Field on Coal and Gas Outbursts |
| title_full_unstemmed | The Effect of a Tectonic Stress Field on Coal and Gas Outbursts |
| title_short | The Effect of a Tectonic Stress Field on Coal and Gas Outbursts |
| title_sort | effect of a tectonic stress field on coal and gas outbursts |
| url | http://dx.doi.org/10.1155/2014/813063 |
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