POMHAZ contribution to EGU


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Marwan Al Heib

11 months 1 week ago

EGU 2023 - Vienna, Austria & Online | 23–28 April 2023


Multi-hazard analysis of abandoned coal-mines 


Marwan Al Heib. Marwan.alheib@ineris.fr 


L’Institut national de l'environnement industriel et des risques 



Nowadays, most coal mines in Europe are already closed or are in a state of liquidation. However, the problem concerning the abandoned coal mines and their influence on the environment is still a central objective of the mining industry and coal regions in transition. After the end of the exploitation, numerous disturbances can occur. Mines operators, local authorities and decision makers face multi-hazard and multi-risks related to mine closure. Land and especially planning for a proper old mining site rehabilitation require better tools to apprehend the multiplicity of hazards and constraints.

The objective to improve risk assessment by creating a new methodology to treat a global and multi-hazard related to abandoned coalmines instead of each hazard separately and study the interaction between the hazards related to post-mining areas. 

The mining hazards concern: ground movement, hydrologic hazards, self-heating, soil and water pollution. One hazard can trigger another one. Different tools such as a global matrix, fault tree, etc. for identifying the hazard interaction. The hazard interaction matrix was built, figure 1 shows a tentative view of interactions that phenomena in the columns (source phenomenon) may have with phenomena in the rows (target phenomenon). Figure 1 also shows indicative interactions between source phenomena and target phenomena according to 4 levels of interactions: No known case of interaction between phenomena (white colour), Low (yellow), Medium (green) and High (red). The final adopted interactions are based on the feedback and the deep discussion between experts. This approach will help the mining actors to improve and design the mitigation measures facing the multi-hazard impact and consequences.