Mining footprint of the underground longwall caving extraction method: a case study of a typical industrial coal area in China
| Autor: | Wang Xinfu, Jianguo He, Alfonso Rodriguez-Dono, Jixiong Zhang, Shun Pang, Yanjun Wang, Hengfeng Liu |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Doctorat en Enginyeria del Terreny, Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
China
Environmental Engineering Geographic information system Source apportionment Soil test Health Toxicology and Mutagenesis Longwall caving mining Mining footprint Footprint Soil Mining engineering Metals Heavy Groundwater-related subsidence Soil Pollutants Environmental Chemistry Coal Soil heavy metal Waste Management and Disposal Ensure availability and sustainable management of water and sanitation for all Mines de carbó -- Xina business.industry Settlement (structural) Subsidence Coal Mining Pollution Coal mines and mining -- China Soil water Environmental science Enginyeria civil::Enginyeria de mines::Explotació de mines [Àrees temàtiques de la UPC] Surface subsidence business Environmental Monitoring |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| DOI: | 10.1016/j.jhazmat.2021.127762 |
| Popis: | Longwall caving mining (LCM) can lead to many environmental problems that have drawn worldwide attention. A previous survey found that most scholars tend to analyze the two issues separately, that is, coal mining-induced subsidence and heavy metal pollution sources in the soil of the mining regions. Based on field monitoring as well as the collection and analysis of soil samples, a previous study estimated ground settlement and analyzed the surface subsidence law and spatial distribution characteristics of heavy metals in soils. Moreover, a geographic information system was combined with multivariate statistical analysis methods to analyze the heavy metal pollution sources in soils. At the same time, the mechanism of heavy metal accumulation in the subsidence area was analyzed. The study found that the most active subsidence of settlement was 137.5 m behind the workface and moved forward with the workface. LCM has already caused significant disturbance to the soils in the Hengyuan Mine. Moreover, the distribution pattern of eight heavy metals was consistent with the surface subsidence law. The sources of heavy metal pollution in the soils were also identified; namely, coal mining-induced subsidence (64.1%) and mixed transportation and wind-mediated spread (35.9%), offering a reinterpretation of the LCM's footprint. The authors gratefully acknowledge the support by the Open Fund Project of Key Laboratory of Coal Resources and Mineral Resources, China National Administration of Coal Geology, China [grant number KFKT-2020–1], China National Administration of Coal Geology Funded Research Project, China [grant number ZMKJ-2020-J04–4], Postgraduate Research & Practice Innovation Program of Jiangsu Province, China [grant number KYCX21_2370], and the first author is supported by the China Scholarship Council, China [grant number 202006420032]. The authors would like to extend their thanks to the providers of the materials used in this study, and their appreciation to those who offered support for this study, including the Hengyuan Mine and CUMT. The authors would like to acknowledge the editor and six anonymous reviewers for their valuable comments for the improvement of this paper. Finally, we would like to thank all scholars in the citations for their inspiration, especially Hou Deyi. |
| Databáze: | OpenAIRE |
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