Nanoscale geomechanical properties of Western Australian coal
Geomechanical properties are of great importance in coal mining exploration, (enhanced) coal bed methane production and carbon geosequestration in deep unmineable coal seams. However, coal highly heterogeneous rocks, and conventional experimental methods (e.g. acoustic, seismic or unconfined compres...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/59886 |
| _version_ | 1848760560251830272 |
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| author | Yu, H. Zhang, Y. Lebedev, Maxim Han, T. Verrall, M. Wang, Z. Al-Khdheeawi, E. Al-Yaseri, A. Iglauer, Stefan |
| author_facet | Yu, H. Zhang, Y. Lebedev, Maxim Han, T. Verrall, M. Wang, Z. Al-Khdheeawi, E. Al-Yaseri, A. Iglauer, Stefan |
| author_sort | Yu, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Geomechanical properties are of great importance in coal mining exploration, (enhanced) coal bed methane production and carbon geosequestration in deep unmineable coal seams. However, coal highly heterogeneous rocks, and conventional experimental methods (e.g. acoustic, seismic or unconfined compressive strength tests) only measure the cm-m scale bulk properties. Thus, we measured the geomechanical properties at nanoscale of Western Australian Collie coal. We mapped the nanoscale mechanical heterogeneity and correlated it with the sample's morphology (measured by SEM-EDS). It was found that the quartz and siderite in the coal had higher Young's moduli (up to 28.6 GPa), while the organic coal matrix had lower Young's moduli (from 3 GPa to 5 GPa), while the soft material kaolinite had the lowest Young's moduli ( < 3 GPa). We conclude that it is necessary to measure the geomechanical coal properties at nano/micro scale reliably assess and eventually facilitate field scale CBM/ECBM or CO 2 storage. |
| first_indexed | 2025-11-14T10:17:43Z |
| format | Journal Article |
| id | curtin-20.500.11937-59886 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:17:43Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-598862018-07-09T23:57:11Z Nanoscale geomechanical properties of Western Australian coal Yu, H. Zhang, Y. Lebedev, Maxim Han, T. Verrall, M. Wang, Z. Al-Khdheeawi, E. Al-Yaseri, A. Iglauer, Stefan Geomechanical properties are of great importance in coal mining exploration, (enhanced) coal bed methane production and carbon geosequestration in deep unmineable coal seams. However, coal highly heterogeneous rocks, and conventional experimental methods (e.g. acoustic, seismic or unconfined compressive strength tests) only measure the cm-m scale bulk properties. Thus, we measured the geomechanical properties at nanoscale of Western Australian Collie coal. We mapped the nanoscale mechanical heterogeneity and correlated it with the sample's morphology (measured by SEM-EDS). It was found that the quartz and siderite in the coal had higher Young's moduli (up to 28.6 GPa), while the organic coal matrix had lower Young's moduli (from 3 GPa to 5 GPa), while the soft material kaolinite had the lowest Young's moduli ( < 3 GPa). We conclude that it is necessary to measure the geomechanical coal properties at nano/micro scale reliably assess and eventually facilitate field scale CBM/ECBM or CO 2 storage. 2017 Journal Article http://hdl.handle.net/20.500.11937/59886 10.1016/j.petrol.2017.11.001 Elsevier restricted |
| spellingShingle | Yu, H. Zhang, Y. Lebedev, Maxim Han, T. Verrall, M. Wang, Z. Al-Khdheeawi, E. Al-Yaseri, A. Iglauer, Stefan Nanoscale geomechanical properties of Western Australian coal |
| title | Nanoscale geomechanical properties of Western Australian coal |
| title_full | Nanoscale geomechanical properties of Western Australian coal |
| title_fullStr | Nanoscale geomechanical properties of Western Australian coal |
| title_full_unstemmed | Nanoscale geomechanical properties of Western Australian coal |
| title_short | Nanoscale geomechanical properties of Western Australian coal |
| title_sort | nanoscale geomechanical properties of western australian coal |
| url | http://hdl.handle.net/20.500.11937/59886 |