EGU24-NH10.9-Post-mining, risk assessment, geosciences and environment for the future

End date
Vienna - Austria

The closed mines present several challenges for scientific and mines regions. Post-mining activities in the field of geosciences often involve addressing various geology, geotechnical environmental concerns and challenges in the research and application fields. Here are some key aspects related to post-mining and geosciences in the context of environmental considerations:
1. Hazards Evaluation: Ground Movement
o Subsidence can occur during and after mining operations, and the overlying strata collapse or settle into these voids, causing surface depressions. Geoscientists play a crucial role in assessing the potential for subsidence and its impact on the environment and infrastructure.
2. Hazards Mitigation Methods
o Reclamation Geoscientists work on reclamation plans to restore mined areas to their natural state or to suitable post-mining land uses.
o Geotechnical Engineering: Geoscientists and geotechnical engineers collaborate to develop stability assessments and engineering solutions to prevent or minimize ground movement hazards. Techniques such as backfilling, soil stabilization, and structural supports can be employed.
3. Energy and Post-Mine Challenges
o Mine Water Management: Geoscientists help design and implement water management strategies, including the treatment of acid mine drainage (AMD) and the utilization of mine water for geothermal heating or cooling.
o Renewable Energy development: Converting former mining sites into renewable energy facilities, such as solar or wind farms, is a sustainable post-mining option.
4. Storage energy and CO2 and Post-Mine
o Carbon Capture and Storage (CCS): Evaluating the geological and hydrogeological characteristics of potential storage sites is crucial for ensuring the safe and permanent sequestration of CO2.
o Post-Mine Site Selection: Post-mining sites that are no longer suitable for mining operations may be repurposed for CCS or other forms of carbon sequestration.
5. Development of open-pit lake: Geoscientists and hydrogeologists work define the long-term stability of the slope stability, define the reshaping of the land, replanting vegetation, and ensuring proper drainage to mitigate hazards like erosion and water quality degradation.
6. Revalorization of mining tailing storage facilities: The dumps can be both an environmental hazard and an asset for further reprocessing of tailings materials in order to further extract metals and elements.