Study on micromechanism of water absorption and its softening effect on shale rock in deep coal measures
Water absorption experiments under different water pressures were carried out on a series of shale samples collected from Shenyang of Liaoning province using a self-developed hydrophilic experimental system.At the same time,X-ray diffraction,high pressure mercury intrusion,scanning electron microsco...
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| Format: | Article |
| Language: | English |
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Emergency Management Press
2019-08-01
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| Series: | 矿业科学学报 |
| Subjects: | |
| Online Access: | http://kykxxb.cumtb.edu.cn/article/id/228 |
| _version_ | 1811308070199885824 |
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| author | Zhang Na Wang Shuibing He Xiao Li Jiabin Gao Weihao |
| author_facet | Zhang Na Wang Shuibing He Xiao Li Jiabin Gao Weihao |
| author_sort | Zhang Na |
| collection | DOAJ |
| description | Water absorption experiments under different water pressures were carried out on a series of shale samples collected from Shenyang of Liaoning province using a self-developed hydrophilic experimental system.At the same time,X-ray diffraction,high pressure mercury intrusion,scanning electron microscope and uniaxial compression experiments were performed on the shale rock samples before and after water absorption.The experimental results are as follows:① the absorbed water increases with time while the water absorption rate decreases with time and water absorption curves can be well fitted by an exponential function;② the water absorption capacities of the shale samples under different water pressures are remarkably different which are suggesting that water pressure can significantly increase the water absorptivity;③ the water absorption capacity and the clay mineral content are positively correlated which indicates that the clay minerals,specifically illite,plays an important role in water absorption process of the shale samples;④ the water absorption capacity and the effective porosity are negatively correlated and the reasons are closely related to a micro-structural perspective;⑤ the uniaxial compression strength(UCS)of the hydrated shale samples is negatively correlated with their water content and the increase of the porosity after water absorption may be an important reason for decreased strength of the hydrated shale samples. |
| first_indexed | 2024-04-13T09:16:54Z |
| format | Article |
| id | doaj.art-7f82e0b5f384457d8c0b4777da887e5a |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-13T09:16:54Z |
| publishDate | 2019-08-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-7f82e0b5f384457d8c0b4777da887e5a2022-12-22T02:52:43ZengEmergency Management Press矿业科学学报2096-21932019-08-014430831710.19606/j.cnki.jmst.2019.04.00420190404Study on micromechanism of water absorption and its softening effect on shale rock in deep coal measuresZhang Na0Wang Shuibing1He Xiao2Li Jiabin3Gao Weihao4State Key Laboratory for GeoMechanics and Deep Underground Engineering, Beijing 100083, ChinaState Key Laboratory for GeoMechanics and Deep Underground Engineering, Beijing 100083, ChinaState Key Laboratory for GeoMechanics and Deep Underground Engineering, Beijing 100083, ChinaState Key Laboratory for GeoMechanics and Deep Underground Engineering, Beijing 100083, ChinaState Key Laboratory for GeoMechanics and Deep Underground Engineering, Beijing 100083, ChinaWater absorption experiments under different water pressures were carried out on a series of shale samples collected from Shenyang of Liaoning province using a self-developed hydrophilic experimental system.At the same time,X-ray diffraction,high pressure mercury intrusion,scanning electron microscope and uniaxial compression experiments were performed on the shale rock samples before and after water absorption.The experimental results are as follows:① the absorbed water increases with time while the water absorption rate decreases with time and water absorption curves can be well fitted by an exponential function;② the water absorption capacities of the shale samples under different water pressures are remarkably different which are suggesting that water pressure can significantly increase the water absorptivity;③ the water absorption capacity and the clay mineral content are positively correlated which indicates that the clay minerals,specifically illite,plays an important role in water absorption process of the shale samples;④ the water absorption capacity and the effective porosity are negatively correlated and the reasons are closely related to a micro-structural perspective;⑤ the uniaxial compression strength(UCS)of the hydrated shale samples is negatively correlated with their water content and the increase of the porosity after water absorption may be an important reason for decreased strength of the hydrated shale samples.http://kykxxb.cumtb.edu.cn/article/id/228deep soft rockwater absorptionsoftening effectclay mineralsmicrostructure |
| spellingShingle | Zhang Na Wang Shuibing He Xiao Li Jiabin Gao Weihao Study on micromechanism of water absorption and its softening effect on shale rock in deep coal measures 矿业科学学报 deep soft rock water absorption softening effect clay minerals microstructure |
| title | Study on micromechanism of water absorption and its softening effect on shale rock in deep coal measures |
| title_full | Study on micromechanism of water absorption and its softening effect on shale rock in deep coal measures |
| title_fullStr | Study on micromechanism of water absorption and its softening effect on shale rock in deep coal measures |
| title_full_unstemmed | Study on micromechanism of water absorption and its softening effect on shale rock in deep coal measures |
| title_short | Study on micromechanism of water absorption and its softening effect on shale rock in deep coal measures |
| title_sort | study on micromechanism of water absorption and its softening effect on shale rock in deep coal measures |
| topic | deep soft rock water absorption softening effect clay minerals microstructure |
| url | http://kykxxb.cumtb.edu.cn/article/id/228 |
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