Effects of Backfilling Excavated Underground Space on Reducing Acid Mine Drainage in an Abandoned Mine
Three-dimensional groundwater flow around an abandoned mine was simulated to evaluate the effects of backfilling the excavated underground space of the mine on reducing the acid mine drainage (AMD). The conceptual model of the groundwater flow consists of not only variable geological formations but...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-08-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/10/9/777 |
| _version_ | 1797554994416713728 |
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| author | Kohei Yamaguchi Shingo Tomiyama Toshifumi Igarashi Saburo Yamagata Masanori Ebato Masatoshi Sakoda |
| author_facet | Kohei Yamaguchi Shingo Tomiyama Toshifumi Igarashi Saburo Yamagata Masanori Ebato Masatoshi Sakoda |
| author_sort | Kohei Yamaguchi |
| collection | DOAJ |
| description | Three-dimensional groundwater flow around an abandoned mine was simulated to evaluate the effects of backfilling the excavated underground space of the mine on reducing the acid mine drainage (AMD). The conceptual model of the groundwater flow consists of not only variable geological formations but also vertical shafts, horizontal drifts, and the other excavated underground space. The steady-state groundwater flow in both days with high and little rainfall was calculated to calibrate the model. The calculated groundwater levels and flow rate of the AMD agreed with the measured ones by calibrating the hydraulic conductivity of the host rock, which was sensitive to groundwater flow in the mine. This validated model was applied to predict the flow rate of the AMD when backfilling the excavated underground space. The results showed that the flow rate of the AMD decreased by 5% to 30%. This indicates that backfilling the excavated space is one of the effective methods to reduce AMD of abandoned mines. |
| first_indexed | 2024-03-10T16:39:56Z |
| format | Article |
| id | doaj.art-92895d270252447c8214233bdcd78b78 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T16:39:56Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-92895d270252447c8214233bdcd78b782023-11-20T12:05:01ZengMDPI AGMinerals2075-163X2020-08-0110977710.3390/min10090777Effects of Backfilling Excavated Underground Space on Reducing Acid Mine Drainage in an Abandoned MineKohei Yamaguchi0Shingo Tomiyama1Toshifumi Igarashi2Saburo Yamagata3Masanori Ebato4Masatoshi Sakoda5Division of Sustainable Resources Engineering, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, JapanFaculty of Engineering, Hokkaido University, Sapporo 060-8628, JapanFaculty of Engineering, Hokkaido University, Sapporo 060-8628, JapanMitsubishi Materials Corporation, 3-2-3, Marunouchi, Chiyoda-ku, Tokyo 100-8117, JapanOyo Corporation, 2-10-9, Daitakubo, Minami-ku, Saitama-shi, Saitama 336-0015, JapanJapan Oil, Gas and Metals National Corporation (JOGMEC), 2-10-1, Toranomon, Minato-ku, Tokyo 105-0001, JapanThree-dimensional groundwater flow around an abandoned mine was simulated to evaluate the effects of backfilling the excavated underground space of the mine on reducing the acid mine drainage (AMD). The conceptual model of the groundwater flow consists of not only variable geological formations but also vertical shafts, horizontal drifts, and the other excavated underground space. The steady-state groundwater flow in both days with high and little rainfall was calculated to calibrate the model. The calculated groundwater levels and flow rate of the AMD agreed with the measured ones by calibrating the hydraulic conductivity of the host rock, which was sensitive to groundwater flow in the mine. This validated model was applied to predict the flow rate of the AMD when backfilling the excavated underground space. The results showed that the flow rate of the AMD decreased by 5% to 30%. This indicates that backfilling the excavated space is one of the effective methods to reduce AMD of abandoned mines.https://www.mdpi.com/2075-163X/10/9/777abandoned minegroundwater flow analysisacid mine drainagebackfilling |
| spellingShingle | Kohei Yamaguchi Shingo Tomiyama Toshifumi Igarashi Saburo Yamagata Masanori Ebato Masatoshi Sakoda Effects of Backfilling Excavated Underground Space on Reducing Acid Mine Drainage in an Abandoned Mine Minerals abandoned mine groundwater flow analysis acid mine drainage backfilling |
| title | Effects of Backfilling Excavated Underground Space on Reducing Acid Mine Drainage in an Abandoned Mine |
| title_full | Effects of Backfilling Excavated Underground Space on Reducing Acid Mine Drainage in an Abandoned Mine |
| title_fullStr | Effects of Backfilling Excavated Underground Space on Reducing Acid Mine Drainage in an Abandoned Mine |
| title_full_unstemmed | Effects of Backfilling Excavated Underground Space on Reducing Acid Mine Drainage in an Abandoned Mine |
| title_short | Effects of Backfilling Excavated Underground Space on Reducing Acid Mine Drainage in an Abandoned Mine |
| title_sort | effects of backfilling excavated underground space on reducing acid mine drainage in an abandoned mine |
| topic | abandoned mine groundwater flow analysis acid mine drainage backfilling |
| url | https://www.mdpi.com/2075-163X/10/9/777 |
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