Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining
The cemented coal gangue backfill (CGB) in coal mining is normally made of gangue (particle size of 0–15 mm), fly ash, cement, and water. In this study, the effects of the weight content (ranging from 20% to 60%) of fine gangue (0–5 mm) on the microscopic characteristics, resistivity, and compressiv...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2015/752678 |
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| author | Tingye Qi Guorui Feng Yanrong Li Yuxia Guo Jun Guo Yujiang Zhang |
| author_facet | Tingye Qi Guorui Feng Yanrong Li Yuxia Guo Jun Guo Yujiang Zhang |
| author_sort | Tingye Qi |
| collection | DOAJ |
| description | The cemented coal gangue backfill (CGB) in coal mining is normally made of gangue (particle size of 0–15 mm), fly ash, cement, and water. In this study, the effects of the weight content (ranging from 20% to 60%) of fine gangue (0–5 mm) on the microscopic characteristics, resistivity, and compressive strength of CGB were investigated at 3 d and 28 d curing times, respectively. The test results indicate that the strengths of the CGB, regardless of the curing time, increased with fine gangue content changing from 20% up to 40%. Further increase in fine gangue introduced a decrease in the strength. Another observation is that, at 3 days, a general increasing trend of CGB resistivity was noted with fine gangue content. At 28 days, the resistivity of CGB decreased with increase in the fine gangue content. Correlations between the resistivity and compression strength of CGB show a concave pattern, which attribute to the various micromechanism influenced on the resistivity and strength of CGB with different fine gangue content. It indicates that using resistivity to derive strength of CGB is not appropriate. |
| format | Article |
| id | doaj-art-87d92514f16740abb693bf5bc66dbf95 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-87d92514f16740abb693bf5bc66dbf952025-02-03T01:23:42ZengWileyShock and Vibration1070-96221875-92032015-01-01201510.1155/2015/752678752678Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal MiningTingye Qi0Guorui Feng1Yanrong Li2Yuxia Guo3Jun Guo4Yujiang Zhang5College of Mineral Engineering, Taiyuan University of Technology, No. 79 Yingze Western Street, Taiyuan, Shanxi 030024, ChinaCollege of Mineral Engineering, Taiyuan University of Technology, No. 79 Yingze Western Street, Taiyuan, Shanxi 030024, ChinaCollege of Mineral Engineering, Taiyuan University of Technology, No. 79 Yingze Western Street, Taiyuan, Shanxi 030024, ChinaCollege of Mineral Engineering, Taiyuan University of Technology, No. 79 Yingze Western Street, Taiyuan, Shanxi 030024, ChinaCollege of Mineral Engineering, Taiyuan University of Technology, No. 79 Yingze Western Street, Taiyuan, Shanxi 030024, ChinaCollege of Mineral Engineering, Taiyuan University of Technology, No. 79 Yingze Western Street, Taiyuan, Shanxi 030024, ChinaThe cemented coal gangue backfill (CGB) in coal mining is normally made of gangue (particle size of 0–15 mm), fly ash, cement, and water. In this study, the effects of the weight content (ranging from 20% to 60%) of fine gangue (0–5 mm) on the microscopic characteristics, resistivity, and compressive strength of CGB were investigated at 3 d and 28 d curing times, respectively. The test results indicate that the strengths of the CGB, regardless of the curing time, increased with fine gangue content changing from 20% up to 40%. Further increase in fine gangue introduced a decrease in the strength. Another observation is that, at 3 days, a general increasing trend of CGB resistivity was noted with fine gangue content. At 28 days, the resistivity of CGB decreased with increase in the fine gangue content. Correlations between the resistivity and compression strength of CGB show a concave pattern, which attribute to the various micromechanism influenced on the resistivity and strength of CGB with different fine gangue content. It indicates that using resistivity to derive strength of CGB is not appropriate.http://dx.doi.org/10.1155/2015/752678 |
| spellingShingle | Tingye Qi Guorui Feng Yanrong Li Yuxia Guo Jun Guo Yujiang Zhang Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining Shock and Vibration |
| title | Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining |
| title_full | Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining |
| title_fullStr | Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining |
| title_full_unstemmed | Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining |
| title_short | Effects of Fine Gangue on Strength, Resistivity, and Microscopic Properties of Cemented Coal Gangue Backfill for Coal Mining |
| title_sort | effects of fine gangue on strength resistivity and microscopic properties of cemented coal gangue backfill for coal mining |
| url | http://dx.doi.org/10.1155/2015/752678 |
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