Contribution à l’étude des formations géologiques du périmètre de la carriére d’agrégats de Kef el Mounchar-Sekrine :Cartographie et caracteristiques structurales et physico-chimiques ( Oueled khelouf, Wilaya de Mila,Algérie )

Abstract

Learning to prepare a deposit of aggregates for the exploitation is the goal of this work that implies the cartography of the zone, petrographic, chemical and mechanical studies in order to get all the geological, physical and chemical parameters necessary to guide the exploitation and to ensure the safety of the exploitation and to minimize the impact on the environment but also to find the optimal use for the product. Our study is to make at first a geological study of the Kef el Mounchar formations located at 5 km from Oueled Khlouf, Wilaya of Mila. This geological study involves the description of the Kef el Mounchar formation while describing the major phenomena and the realization of a geological map and also a petrographic study to know the microscopic characteristics and paleogeographic information of these formations. The study continues with mechanical tests exactly the tests of Los Angelos and Micro-Deval made on five samples respectively to know the resistance to fragmentation and resistance to wear. Oriented on French and European standards it has been concluded that limestones can be used as aggregates for concrete and wearing courses. The chemical study by XRF has the objective of finding the optimal use of these limestones have which confirmed that these limestones should be used as aggregates. The structural study carried out made it possible to specify four families of fractures which have been represented on the structural map. These breaks represent risks during the exploitation and consequently several recommendations have been proposed..ى As for Sekrine quarry, the impact on the inhabitants is almost non-existent at a distance of 4 Km that separates the city from the quarry but other impacts persist on the fauna and flora but also on the employees of which several recommendations have been proposed. The revaluation of the remaining reserves by cutting methods made it possible to estimate the reserves at 5.65 MT.