Post-Mining Hazard Management of the Former Gardanne Coal Basin (France): Feedback of 17 Years of Microseismic Monitoring
The former Provence coal basin, closed since 2003, has been monitored by a microseismic network since 2008. The objective is to detect the precursor signs of a brittle subsidence that would be caused by the collapse of the old underground mining works. Since the start of monitoring, no subsidence ha...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-06-01
|
| Series: | Mining |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2673-6489/5/2/35 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850168322865233920 |
|---|---|
| author | Isabelle Contrucci Jannes L. Kinscher Kévin Delage Emmanuelle Klein |
| author_facet | Isabelle Contrucci Jannes L. Kinscher Kévin Delage Emmanuelle Klein |
| author_sort | Isabelle Contrucci |
| collection | DOAJ |
| description | The former Provence coal basin, closed since 2003, has been monitored by a microseismic network since 2008. The objective is to detect the precursor signs of a brittle subsidence that would be caused by the collapse of the old underground mining works. Since the start of monitoring, no subsidence has affected the risk areas, and nearly 4000 events with a local magnitude between −3 < M<sub>L</sub> < 3 have been recorded. One sector in particular, called the Fuveau swarm, located outside the risk zones and therefore outside the brittle subsidence hazard zones, has attracted attention since 2012 because it was the subject of several seismic episodes felt in 2010, 2012, 2014, late 2016–early 2017, and August 2017. Since 2017, it has been established that the observed seismicity cannot be explained only by instability phenomena in the old mining works. The most likely hypothesis is that of the remobilization of faults hydraulically connected to the mining works, with seismic activity that is closely linked to variations in the groundwater level, which are themselves influenced by pumping and effective rainfall. This paper shows, through multiplet analysis method of the seismic data recorded by the monitoring network stations, that part of the seismicity in the monitoring areas is also due to the reactivation of tectonic faults. This conclusion is based on the concordance between the location of the multiplets and the orientation of the main faults mapped in the studied areas, as well as on the fact that the strongest events belong to these multiplets. This finding underscores the need to integrate fault reactivation into seismic monitoring strategies, beyond the current focus on mining-induced instabilities. This conclusion leads us to recommend revising the list of post-mining hazards, as post-mining seismic risk is often overlooked in many European regulations. |
| format | Article |
| id | doaj-art-fa84a67849ae43eda6addfb452b84b8a |
| institution | OA Journals |
| issn | 2673-6489 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Mining |
| spelling | doaj-art-fa84a67849ae43eda6addfb452b84b8a2025-08-20T02:20:59ZengMDPI AGMining2673-64892025-06-01523510.3390/mining5020035Post-Mining Hazard Management of the Former Gardanne Coal Basin (France): Feedback of 17 Years of Microseismic MonitoringIsabelle Contrucci0Jannes L. Kinscher1Kévin Delage2Emmanuelle Klein3Ineris, Institut National de l’Environnement Industriel et des Risques, École des Mines de Nancy, Campus ARTEM, 92 Rue du Sergent Blandan, BP 14234, F54042 Nancy Cedex, FranceIneris, Institut National de l’Environnement Industriel et des Risques, École des Mines de Nancy, Campus ARTEM, 92 Rue du Sergent Blandan, BP 14234, F54042 Nancy Cedex, FranceIneris, Institut National de l’Environnement Industriel et des Risques, École des Mines de Nancy, Campus ARTEM, 92 Rue du Sergent Blandan, BP 14234, F54042 Nancy Cedex, FranceIneris, Institut National de l’Environnement Industriel et des Risques, École des Mines de Nancy, Campus ARTEM, 92 Rue du Sergent Blandan, BP 14234, F54042 Nancy Cedex, FranceThe former Provence coal basin, closed since 2003, has been monitored by a microseismic network since 2008. The objective is to detect the precursor signs of a brittle subsidence that would be caused by the collapse of the old underground mining works. Since the start of monitoring, no subsidence has affected the risk areas, and nearly 4000 events with a local magnitude between −3 < M<sub>L</sub> < 3 have been recorded. One sector in particular, called the Fuveau swarm, located outside the risk zones and therefore outside the brittle subsidence hazard zones, has attracted attention since 2012 because it was the subject of several seismic episodes felt in 2010, 2012, 2014, late 2016–early 2017, and August 2017. Since 2017, it has been established that the observed seismicity cannot be explained only by instability phenomena in the old mining works. The most likely hypothesis is that of the remobilization of faults hydraulically connected to the mining works, with seismic activity that is closely linked to variations in the groundwater level, which are themselves influenced by pumping and effective rainfall. This paper shows, through multiplet analysis method of the seismic data recorded by the monitoring network stations, that part of the seismicity in the monitoring areas is also due to the reactivation of tectonic faults. This conclusion is based on the concordance between the location of the multiplets and the orientation of the main faults mapped in the studied areas, as well as on the fact that the strongest events belong to these multiplets. This finding underscores the need to integrate fault reactivation into seismic monitoring strategies, beyond the current focus on mining-induced instabilities. This conclusion leads us to recommend revising the list of post-mining hazards, as post-mining seismic risk is often overlooked in many European regulations.https://www.mdpi.com/2673-6489/5/2/35mine closuremicroseismic monitoringpost-mining hazardsmultiplet analysisfloodingpost-mining seismic risk |
| spellingShingle | Isabelle Contrucci Jannes L. Kinscher Kévin Delage Emmanuelle Klein Post-Mining Hazard Management of the Former Gardanne Coal Basin (France): Feedback of 17 Years of Microseismic Monitoring Mining mine closure microseismic monitoring post-mining hazards multiplet analysis flooding post-mining seismic risk |
| title | Post-Mining Hazard Management of the Former Gardanne Coal Basin (France): Feedback of 17 Years of Microseismic Monitoring |
| title_full | Post-Mining Hazard Management of the Former Gardanne Coal Basin (France): Feedback of 17 Years of Microseismic Monitoring |
| title_fullStr | Post-Mining Hazard Management of the Former Gardanne Coal Basin (France): Feedback of 17 Years of Microseismic Monitoring |
| title_full_unstemmed | Post-Mining Hazard Management of the Former Gardanne Coal Basin (France): Feedback of 17 Years of Microseismic Monitoring |
| title_short | Post-Mining Hazard Management of the Former Gardanne Coal Basin (France): Feedback of 17 Years of Microseismic Monitoring |
| title_sort | post mining hazard management of the former gardanne coal basin france feedback of 17 years of microseismic monitoring |
| topic | mine closure microseismic monitoring post-mining hazards multiplet analysis flooding post-mining seismic risk |
| url | https://www.mdpi.com/2673-6489/5/2/35 |
| work_keys_str_mv | AT isabellecontrucci postmininghazardmanagementoftheformergardannecoalbasinfrancefeedbackof17yearsofmicroseismicmonitoring AT janneslkinscher postmininghazardmanagementoftheformergardannecoalbasinfrancefeedbackof17yearsofmicroseismicmonitoring AT kevindelage postmininghazardmanagementoftheformergardannecoalbasinfrancefeedbackof17yearsofmicroseismicmonitoring AT emmanuelleklein postmininghazardmanagementoftheformergardannecoalbasinfrancefeedbackof17yearsofmicroseismicmonitoring |