Investigation of the suspended solids removal from mine water by the rock accumulation effect in the underground reservoir of coal mines
The opening of an underground coal mine reservoir provides an effective technical approach to ensure the rational utilization of water resources during mining operations. This study focuses on the rock and mine water of the Daliuta Coal Mine reservoir in the Shendong Mining Area, employing simulatio...
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Editorial Department of Coal Science and Technology
2024-12-01
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| Series: | Meitan kexue jishu |
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| Online Access: | http://www.mtkxjs.com.cn/article/doi/10.12438/cst.2023-1602 |
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| author | Binbin JIANG Jingfeng LI Liqiang MA Min WU Chen SU Jihui LI |
| author_facet | Binbin JIANG Jingfeng LI Liqiang MA Min WU Chen SU Jihui LI |
| author_sort | Binbin JIANG |
| collection | DOAJ |
| description | The opening of an underground coal mine reservoir provides an effective technical approach to ensure the rational utilization of water resources during mining operations. This study focuses on the rock and mine water of the Daliuta Coal Mine reservoir in the Shendong Mining Area, employing simulation tests for mine water suspended solids removal and a coupling simulation of Fluent-EDEM. The impact of rock accumulation on the removal of suspended solids in water is quantified, revealing that the accumulation environment alters the mine flow state, creates a distinct reflux zone and low-speed zone, extends the sedimentation distance for suspended matter, and reduces water flow disturbance, resulting in a quasi-free sedimentation environment. Within a specific range, the suspended matter concentration gradually decreases with increasing settling time and distance. At the m outlet, the suspended matter concentration is 20 mg/L, a 95.7% reduction from the initial concentration. The steady-state settling time for suspended matter is 5 hours, with a turbidity of 60 NTU, significantly smaller than the 9 hours and 350 NTU observed in the blank simulation test. Post-sedimentation, the average diameter of suspended particles decreases from 14.99 µm to 2.02 µm, while the specific surface area increases from 12.30 m2/g to 15.75 m2/g. The removal of suspended matter from the underground reservoir is primarily through filtration, sedimentation, and adsorption, which results in a shorter sedimentation time and more efficient removal of suspended matter. This research provides a theoretical foundation for predicting effluent quality characteristics and preventing and controlling siltation in coal mine underground reservoirs. |
| format | Article |
| id | doaj-art-3d62e782aee74f56884bec1b8df9decc |
| institution | Kabale University |
| issn | 0253-2336 |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Editorial Department of Coal Science and Technology |
| record_format | Article |
| series | Meitan kexue jishu |
| spelling | doaj-art-3d62e782aee74f56884bec1b8df9decc2025-01-15T05:38:22ZzhoEditorial Department of Coal Science and TechnologyMeitan kexue jishu0253-23362024-12-01521235236110.12438/cst.2023-16022023-1602Investigation of the suspended solids removal from mine water by the rock accumulation effect in the underground reservoir of coal minesBinbin JIANG0Jingfeng LI1Liqiang MA2Min WU3Chen SU4Jihui LI5State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, China Energy Investment Corporation Limited, Beijing 102209, ChinaState Key Laboratory of Water Resource Protection and Utilization in Coal Mining, China Energy Investment Corporation Limited, Beijing 102209, ChinaSchool of Chemical and Environ mental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaState Key Laboratory of Water Resource Protection and Utilization in Coal Mining, China Energy Investment Corporation Limited, Beijing 102209, ChinaState Key Laboratory of Water Resource Protection and Utilization in Coal Mining, China Energy Investment Corporation Limited, Beijing 102209, ChinaSchool of Chemical and Environ mental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaThe opening of an underground coal mine reservoir provides an effective technical approach to ensure the rational utilization of water resources during mining operations. This study focuses on the rock and mine water of the Daliuta Coal Mine reservoir in the Shendong Mining Area, employing simulation tests for mine water suspended solids removal and a coupling simulation of Fluent-EDEM. The impact of rock accumulation on the removal of suspended solids in water is quantified, revealing that the accumulation environment alters the mine flow state, creates a distinct reflux zone and low-speed zone, extends the sedimentation distance for suspended matter, and reduces water flow disturbance, resulting in a quasi-free sedimentation environment. Within a specific range, the suspended matter concentration gradually decreases with increasing settling time and distance. At the m outlet, the suspended matter concentration is 20 mg/L, a 95.7% reduction from the initial concentration. The steady-state settling time for suspended matter is 5 hours, with a turbidity of 60 NTU, significantly smaller than the 9 hours and 350 NTU observed in the blank simulation test. Post-sedimentation, the average diameter of suspended particles decreases from 14.99 µm to 2.02 µm, while the specific surface area increases from 12.30 m2/g to 15.75 m2/g. The removal of suspended matter from the underground reservoir is primarily through filtration, sedimentation, and adsorption, which results in a shorter sedimentation time and more efficient removal of suspended matter. This research provides a theoretical foundation for predicting effluent quality characteristics and preventing and controlling siltation in coal mine underground reservoirs.http://www.mtkxjs.com.cn/article/doi/10.12438/cst.2023-1602coal mine underground reservoirsedimentation of suspended solidsrock accumulation effectanalogue simulationflow state distribution characteristic |
| spellingShingle | Binbin JIANG Jingfeng LI Liqiang MA Min WU Chen SU Jihui LI Investigation of the suspended solids removal from mine water by the rock accumulation effect in the underground reservoir of coal mines Meitan kexue jishu coal mine underground reservoir sedimentation of suspended solids rock accumulation effect analogue simulation flow state distribution characteristic |
| title | Investigation of the suspended solids removal from mine water by the rock accumulation effect in the underground reservoir of coal mines |
| title_full | Investigation of the suspended solids removal from mine water by the rock accumulation effect in the underground reservoir of coal mines |
| title_fullStr | Investigation of the suspended solids removal from mine water by the rock accumulation effect in the underground reservoir of coal mines |
| title_full_unstemmed | Investigation of the suspended solids removal from mine water by the rock accumulation effect in the underground reservoir of coal mines |
| title_short | Investigation of the suspended solids removal from mine water by the rock accumulation effect in the underground reservoir of coal mines |
| title_sort | investigation of the suspended solids removal from mine water by the rock accumulation effect in the underground reservoir of coal mines |
| topic | coal mine underground reservoir sedimentation of suspended solids rock accumulation effect analogue simulation flow state distribution characteristic |
| url | http://www.mtkxjs.com.cn/article/doi/10.12438/cst.2023-1602 |
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