Surface microtopography and micromechanics of various rank coals : = Surface microtopography and micromechanics of various rank coals
For a long time, coalbed gas has brought about various problems to the safety of coal mine production. In addition, the mining of gas and coalbed methane(CBM) has attracted much attention. The occurrence and migration of CBM are believed to be closely related to the micro-surface properties of coal. To further explore the characteristics of CBM occurrence and migration, in this study, the micro-surface topography, adhesion, and elastic modulus of five metamorphic coals were measured by atomic force microscopy(AFM). The results show that the microtopography of coal fluctuates around 40 nm, reaching a maximum of 66.5 nm and the roughness of the surface decreases with the increase of metamorphism. The elastic modulus of coal micro-surface varies from 95.40 to 9626.41 MPa, while the adhesion varies from 15.08 to 436.22 nN, and they both exhibit a trend of "M" shape with the increase of metamorphism. Furthermore, a high correlation exists between adhesion and microtopography fluctuation. In most cases, the adhesion is larger in the concavity area and smaller in the convexity area. The research results may provide a new method for revealing the occurrence and migration of CBM and ensure efficient and safe CBM exploitation..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019-11-15 2019 |
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| Erschienen: |
2019-11-15 |
| Enthalten in: |
Zur Gesamtaufnahme - year:2019 |
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| Enthalten in: |
International journal of minerals, metallurgy and materials - (2019), 11 vom: 15. Nov., Seite 1351-1363 Original Letters: Enthalten in (DE-576)307016935 (DE-576)307016935 |
| Reihe: |
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| Sprache: |
Chinesisch |
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| Weiterer Titel: |
Surface microtopography and micromechanics of various rank coals |
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| Beteiligte Personen: |
Xiang-hui Tian [VerfasserIn] |
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| Links: |
oversea.cnki.net [lizenzpflichtig] |
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| Anmerkungen: |
Author info:Xiang-hui Tian;Da-zhao Song;Xue-qiu He;Hui-fang Liu;Wei-xiang Wang;Zhen-lei Li;Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine, University of Science and Technology Beijing;School of Civil and Resources Engineering, University of Science and Technology Beijing;School of Civil, Mining and Environmental Engineering, University of Wollongong |
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| Förderinstitution / Projekttitel: |
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CAJ643122524 |
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| 245 | 1 | 0 | |a Surface microtopography and micromechanics of various rank coals |b = Surface microtopography and micromechanics of various rank coals |
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| 500 | |a Author info:Xiang-hui Tian;Da-zhao Song;Xue-qiu He;Hui-fang Liu;Wei-xiang Wang;Zhen-lei Li;Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine, University of Science and Technology Beijing;School of Civil and Resources Engineering, University of Science and Technology Beijing;School of Civil, Mining and Environmental Engineering, University of Wollongong | ||
| 520 | |a For a long time, coalbed gas has brought about various problems to the safety of coal mine production. In addition, the mining of gas and coalbed methane(CBM) has attracted much attention. The occurrence and migration of CBM are believed to be closely related to the micro-surface properties of coal. To further explore the characteristics of CBM occurrence and migration, in this study, the micro-surface topography, adhesion, and elastic modulus of five metamorphic coals were measured by atomic force microscopy(AFM). The results show that the microtopography of coal fluctuates around 40 nm, reaching a maximum of 66.5 nm and the roughness of the surface decreases with the increase of metamorphism. The elastic modulus of coal micro-surface varies from 95.40 to 9626.41 MPa, while the adhesion varies from 15.08 to 436.22 nN, and they both exhibit a trend of "M" shape with the increase of metamorphism. Furthermore, a high correlation exists between adhesion and microtopography fluctuation. In most cases, the adhesion is larger in the concavity area and smaller in the convexity area. The research results may provide a new method for revealing the occurrence and migration of CBM and ensure efficient and safe CBM exploitation. | ||
| 610 | 2 | 4 | |a Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mine, University of Science and Technology Beijing |
| 610 | 2 | 4 | |a School of Civil and Resources Engineering, University of Science and Technology Beijing |
| 610 | 2 | 4 | |a School of Civil, Mining and Environmental Engineering, University of Wollongong |
| 650 | 4 | |a 气田开发与开采 | |
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| 650 | 4 | |a Chemistry/ Metallurgy/ Environment/ Mine Industry | |
| 650 | 4 | |a coal | |
| 650 | 4 | |a atomic force microscopy | |
| 650 | 4 | |a microtopography | |
| 650 | 4 | |a adhesion | |
| 650 | 4 | |a elastic modulus | |
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