The current work deals with the monitoring and control of exploration and exploitation activities at the Lauzoua manganese mining (LMM) located in the Guitry department, in the southwestern tip of Côte d’Ivoire. In order to prevent and reduce the risk of accidents associated with the mine’s activities, we undertook a safety audit of the working environment, i.e. to identify the inadequacies and dangerous situations present during exploration and mining activities. Our work focused first on identifying and listing the mine’s activities through a field survey and visual observation, and then on assessing the risks associated with these activities using the Failure Modes, Effects and Criticality Analysis (FMECA) method. Our study reveals different risks of which we have categorized them in order of dangerousness, i.e. dramatic, serious and limited risks, with a serious risk percentage of 80% for exploration activities, compared with 28.57% for operating activities. The results show that the highest unsafe risk encountered during exploration campaign are caused by the injury or fracture in the event of a fall into the deepest shafts, and the highest unsafe risk encountered during operational activity are caused by driver distraction or lack of adequate lighting on site are the highest. These results clearly show that exploration and mining activities are not risk-free, and need to be carried out in accordance with strict safety monitoring and preventive measures. A strict environmental and safety assessment should therefore be carried out prior to mining activities, to prevent any risks that could impact and compromise the successful completion of the work.

Knowledge of the petrophysical parameters of potentially reservoir levels remains a major concern in the study of sedimentry basins. In addition, numerous studies carried out in the offshore basin of Côte d'Ivoire have revealed reservoirs of the Cretaceous age. The present study is part of a perspective of petrophysical characterization of sandstone and sandy intervals of the Cretaceous of the Abidjan margin. To do this, two holes KN1 and KN2 located in the eastern part of the Abidjan margin were analyzed. Lithology reveals clay, sandstone, sand, limestone, marls and silts containing carbonaceous debris, glauconite and pyrite. The analysis of the petrophysical parameters made it possible to detect potential reservoirs of good quality with an average to good permeability at sandstones and sandy layers. These reservoirs contain fluids (water, oil and gas) in Campanian, Cenomanian and Albian.