Thermal Recovery of Backfilled Pit in the Gulianhe Strip Coalmine in the Hola Basin in Northern Da Xing’Anling Mountains, NE China
In the northern Da Xing’anling Mountains in Northeast China on the southern margin of the Eastern Asia permafrost body, the ground thermal state and boreal ecological environment are sensitive to climate change and human activities. Since the 1980s, the Hola Basin here has been continuously and exte...
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| Format: | Article |
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Frontiers Media S.A.
2022-01-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.806022/full |
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| author | Ruixia He Yan Li Yan Li Huijun Jin Huijun Jin Huijun Jin Hongwei Wang Xiaoying Jin Meiquan Zhu Xinyu Li Yadong Huang Yadong Huang Doudou Jin Doudou Jin Futing Ma |
| author_facet | Ruixia He Yan Li Yan Li Huijun Jin Huijun Jin Huijun Jin Hongwei Wang Xiaoying Jin Meiquan Zhu Xinyu Li Yadong Huang Yadong Huang Doudou Jin Doudou Jin Futing Ma |
| author_sort | Ruixia He |
| collection | DOAJ |
| description | In the northern Da Xing’anling Mountains in Northeast China on the southern margin of the Eastern Asia permafrost body, the ground thermal state and boreal ecological environment are sensitive to climate change and human activities. Since the 1980s, the Hola Basin here has been continuously and extensively developed. In particular, open pits and later backfilling in strip coal mining alters land–atmospheric hydrothermal exchanges in permafrost regions, leading to serious damages to the permafrost environment and boreal forest. After mining, pits need to be backfilled timely and properly for hydrothermal recovery of Xing’an permafrost and the boreal ecological environment. In this study, based on the comparative analysis of monitored ground temperatures in backfilled and undisturbed areas, influencing factors of thermal recovery after backfilling were analyzed through numerical simulations. Results show that the thermal recovery of permafrost in the backfilled area is closely related to temperature, depth, material, and soil moisture content of backfill. The warmer, finer, and thicker the backfill soils, the longer the permafrost recovery. Thermal recovery of permafrost also depends on the moisture content of backfill; the shortest recovery occurs at 15–25% in the backfilled soil moisture content. Based on numerical simulations and combined with enlightenments from features of the ecosystem-protected Xing’an permafrost in Northeast China, a composite configuration of organic soil, crush-rock layer, and proper re-vegetation measures is advised. Based on prudent regulation of heat transfer modes, this composite backfilling method can effectively cool the backfilled ground and can even possibly offset the climate warming. |
| first_indexed | 2024-12-20T11:11:27Z |
| format | Article |
| id | doaj.art-bbc107c850ae48efb16c466e280cc6b1 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-20T11:11:27Z |
| publishDate | 2022-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-bbc107c850ae48efb16c466e280cc6b12022-12-21T19:42:45ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-01-011010.3389/feart.2022.806022806022Thermal Recovery of Backfilled Pit in the Gulianhe Strip Coalmine in the Hola Basin in Northern Da Xing’Anling Mountains, NE ChinaRuixia He0Yan Li1Yan Li2Huijun Jin3Huijun Jin4Huijun Jin5Hongwei Wang6Xiaoying Jin7Meiquan Zhu8Xinyu Li9Yadong Huang10Yadong Huang11Doudou Jin12Doudou Jin13Futing Ma14State Key Laboratory of Frozen Soils Engineering, Da Xing’anling Observation and Research Station of Frozen-Ground Engineering and Environment, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaState Key Laboratory of Frozen Soils Engineering, Da Xing’anling Observation and Research Station of Frozen-Ground Engineering and Environment, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaSchool of Resources and Environment, University of Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Frozen Soils Engineering, Da Xing’anling Observation and Research Station of Frozen-Ground Engineering and Environment, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaSchool of Resources and Environment, University of Chinese Academy of Sciences, Beijing, ChinaSchool of Civil Engineering, Institute of Cold Regions Science and Engineering, Northeast-China Observatory and Research-Station of Permafrost Geo-Environment (Ministry of Education), Northeast Forest University, Harbin, ChinaState Key Laboratory of Frozen Soils Engineering, Da Xing’anling Observation and Research Station of Frozen-Ground Engineering and Environment, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaSchool of Civil Engineering, Institute of Cold Regions Science and Engineering, Northeast-China Observatory and Research-Station of Permafrost Geo-Environment (Ministry of Education), Northeast Forest University, Harbin, ChinaSchool of Civil Engineering, Institute of Cold Regions Science and Engineering, Northeast-China Observatory and Research-Station of Permafrost Geo-Environment (Ministry of Education), Northeast Forest University, Harbin, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin, ChinaState Key Laboratory of Frozen Soils Engineering, Da Xing’anling Observation and Research Station of Frozen-Ground Engineering and Environment, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaSchool of Resources and Environment, University of Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Frozen Soils Engineering, Da Xing’anling Observation and Research Station of Frozen-Ground Engineering and Environment, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, ChinaSchool of Resources and Environment, University of Chinese Academy of Sciences, Beijing, ChinaGulianhe Strip Coalmine, Heilongjiang, ChinaIn the northern Da Xing’anling Mountains in Northeast China on the southern margin of the Eastern Asia permafrost body, the ground thermal state and boreal ecological environment are sensitive to climate change and human activities. Since the 1980s, the Hola Basin here has been continuously and extensively developed. In particular, open pits and later backfilling in strip coal mining alters land–atmospheric hydrothermal exchanges in permafrost regions, leading to serious damages to the permafrost environment and boreal forest. After mining, pits need to be backfilled timely and properly for hydrothermal recovery of Xing’an permafrost and the boreal ecological environment. In this study, based on the comparative analysis of monitored ground temperatures in backfilled and undisturbed areas, influencing factors of thermal recovery after backfilling were analyzed through numerical simulations. Results show that the thermal recovery of permafrost in the backfilled area is closely related to temperature, depth, material, and soil moisture content of backfill. The warmer, finer, and thicker the backfill soils, the longer the permafrost recovery. Thermal recovery of permafrost also depends on the moisture content of backfill; the shortest recovery occurs at 15–25% in the backfilled soil moisture content. Based on numerical simulations and combined with enlightenments from features of the ecosystem-protected Xing’an permafrost in Northeast China, a composite configuration of organic soil, crush-rock layer, and proper re-vegetation measures is advised. Based on prudent regulation of heat transfer modes, this composite backfilling method can effectively cool the backfilled ground and can even possibly offset the climate warming.https://www.frontiersin.org/articles/10.3389/feart.2022.806022/fullstrip coalmineXing’an permafrostopen-pitbackfillingthermal recoveryinfluencing factor |
| spellingShingle | Ruixia He Yan Li Yan Li Huijun Jin Huijun Jin Huijun Jin Hongwei Wang Xiaoying Jin Meiquan Zhu Xinyu Li Yadong Huang Yadong Huang Doudou Jin Doudou Jin Futing Ma Thermal Recovery of Backfilled Pit in the Gulianhe Strip Coalmine in the Hola Basin in Northern Da Xing’Anling Mountains, NE China Frontiers in Earth Science strip coalmine Xing’an permafrost open-pit backfilling thermal recovery influencing factor |
| title | Thermal Recovery of Backfilled Pit in the Gulianhe Strip Coalmine in the Hola Basin in Northern Da Xing’Anling Mountains, NE China |
| title_full | Thermal Recovery of Backfilled Pit in the Gulianhe Strip Coalmine in the Hola Basin in Northern Da Xing’Anling Mountains, NE China |
| title_fullStr | Thermal Recovery of Backfilled Pit in the Gulianhe Strip Coalmine in the Hola Basin in Northern Da Xing’Anling Mountains, NE China |
| title_full_unstemmed | Thermal Recovery of Backfilled Pit in the Gulianhe Strip Coalmine in the Hola Basin in Northern Da Xing’Anling Mountains, NE China |
| title_short | Thermal Recovery of Backfilled Pit in the Gulianhe Strip Coalmine in the Hola Basin in Northern Da Xing’Anling Mountains, NE China |
| title_sort | thermal recovery of backfilled pit in the gulianhe strip coalmine in the hola basin in northern da xing anling mountains ne china |
| topic | strip coalmine Xing’an permafrost open-pit backfilling thermal recovery influencing factor |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.806022/full |
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