3D geological model reconstruction and collapse risk evaluation of old goaf in Dunqiu iron mine
Abstract The complexity of goafs put forward higher requirements for detection methods. A comprehensive detection method for old goaf is proposed, that is, determining the plane distribution range of old goaf by using high-precision magnetic method, determining the horizon of old goaf by using natur...
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Nature Portfolio
2025-04-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-96117-0 |
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| author | Hailong Wang Zhenhua Zhao Lin Han Zhenjiang Luo |
| author_facet | Hailong Wang Zhenhua Zhao Lin Han Zhenjiang Luo |
| author_sort | Hailong Wang |
| collection | DOAJ |
| description | Abstract The complexity of goafs put forward higher requirements for detection methods. A comprehensive detection method for old goaf is proposed, that is, determining the plane distribution range of old goaf by using high-precision magnetic method, determining the horizon of old goaf by using natural source surface wave method and controlled source audio magneto telluric method, and modifying the geophysical exploration results by using engineering drilling. Taking the old goaf of Dunqiu iron mine of China as an engineering background, the comprehensive detection method is successfully applied. The plane areas of goaf formed by mining of No. 1–3 orebody groups are 8640.6 m2, 4992.5 m2 and 6740.4 m2 respectively. The goaf can be divided into pure goaf and backfill goaf, which is 1–7 layers, 30.2–115.0 m buried depth, and 1.6–271.3 m mining thickness. A 3D geological model is constructed for displaying the situation of goaf visually. The goaf volumes of No. 1–3 orebody groups are 159,187.13 m3, 125,604.57 m3 and 174,435.28 m3 respectively. The stability of old goaf is evaluated by using two methods: influence depth of critical load and depth-thickness ratio of goaf, which is poor and has a risk of collapse. The detection method and results have certain guiding significance for the detection and treatment of old goaf in iron mine. |
| format | Article |
| id | doaj-art-27c291e62877476193112e5a60b43bc9 |
| institution | OA Journals |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
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| spelling | doaj-art-27c291e62877476193112e5a60b43bc92025-08-20T01:56:01ZengNature PortfolioScientific Reports2045-23222025-04-0115111910.1038/s41598-025-96117-03D geological model reconstruction and collapse risk evaluation of old goaf in Dunqiu iron mineHailong Wang0Zhenhua Zhao1Lin Han2Zhenjiang Luo3Shandong Provincial Geo-Mineral Engineering Exploration Institute (801 Institute of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources)Shandong Provincial Geo-Mineral Engineering Exploration Institute (801 Institute of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources)Shandong Provincial Geo-Mineral Engineering Exploration Institute (801 Institute of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources)Shandong Provincial Geo-Mineral Engineering Exploration Institute (801 Institute of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources)Abstract The complexity of goafs put forward higher requirements for detection methods. A comprehensive detection method for old goaf is proposed, that is, determining the plane distribution range of old goaf by using high-precision magnetic method, determining the horizon of old goaf by using natural source surface wave method and controlled source audio magneto telluric method, and modifying the geophysical exploration results by using engineering drilling. Taking the old goaf of Dunqiu iron mine of China as an engineering background, the comprehensive detection method is successfully applied. The plane areas of goaf formed by mining of No. 1–3 orebody groups are 8640.6 m2, 4992.5 m2 and 6740.4 m2 respectively. The goaf can be divided into pure goaf and backfill goaf, which is 1–7 layers, 30.2–115.0 m buried depth, and 1.6–271.3 m mining thickness. A 3D geological model is constructed for displaying the situation of goaf visually. The goaf volumes of No. 1–3 orebody groups are 159,187.13 m3, 125,604.57 m3 and 174,435.28 m3 respectively. The stability of old goaf is evaluated by using two methods: influence depth of critical load and depth-thickness ratio of goaf, which is poor and has a risk of collapse. The detection method and results have certain guiding significance for the detection and treatment of old goaf in iron mine.https://doi.org/10.1038/s41598-025-96117-0Old goaf of iron mine3D geological modelCollapse risk evaluationGeophysical explorationEngineering drilling |
| spellingShingle | Hailong Wang Zhenhua Zhao Lin Han Zhenjiang Luo 3D geological model reconstruction and collapse risk evaluation of old goaf in Dunqiu iron mine Scientific Reports Old goaf of iron mine 3D geological model Collapse risk evaluation Geophysical exploration Engineering drilling |
| title | 3D geological model reconstruction and collapse risk evaluation of old goaf in Dunqiu iron mine |
| title_full | 3D geological model reconstruction and collapse risk evaluation of old goaf in Dunqiu iron mine |
| title_fullStr | 3D geological model reconstruction and collapse risk evaluation of old goaf in Dunqiu iron mine |
| title_full_unstemmed | 3D geological model reconstruction and collapse risk evaluation of old goaf in Dunqiu iron mine |
| title_short | 3D geological model reconstruction and collapse risk evaluation of old goaf in Dunqiu iron mine |
| title_sort | 3d geological model reconstruction and collapse risk evaluation of old goaf in dunqiu iron mine |
| topic | Old goaf of iron mine 3D geological model Collapse risk evaluation Geophysical exploration Engineering drilling |
| url | https://doi.org/10.1038/s41598-025-96117-0 |
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