Lina Hajji

Conducted an experimental research project in mining geotechnics aimed at characterizing the post-failure behavior of a co-disposal structure of mine tailings and waste rock. Key responsibilities and achievements included: - Design and planning of the experimental protocol, including the definition of geotechnical parameters to be studied and the testing methodology. - Execution and monitoring of a laboratory testing campaign on samples at different scales to analyze the flow behavior of mine tailings. - Physical modeling (using flume tests) of three failure scenarios (tailings only, a mixture of tailings and waste rock, and tailings confined within a single waste rock cell) to understand flow mechanisms and propose risk mitigation solutions. - Advanced analysis and interpretation of experimental data. - Synthesis and writing of results in a Master's thesis, with regular presentations of progress to supervising professors and the research committee. - Active collaboration with a multidisciplinary research team within the Research Institute on Mines and Environment (IRME).

Assessment of the hydro-geotechnical behavior of the interaction between waste rock and mine tailings in an integrated tailings management context. Key tasks and achievements: - Geotechnical characterization of materials (waste rock, tailings, sand). - Validation and calibration of experimental equipment and testing protocols to ensure the reliability of collected data. - Conducted preliminary tests on internal water migration in sand. These tests verified the reliability of the experimental setup before proceeding with the main tests on the migration of mine tailings through waste rock. Tailings movement was tracked using tracers. - Synthesis and presentation of experimental results in a technical report format for the supervising professor.