Slope Stability Analysis: Case of the West Wall of the EMZ Pit at the Essakane Gold Mine in Burkina Faso (West Africa)  

作　　者：Hamma Fabien Yonli Michée Banyua Lompo Nicolas Kagambega Pierre Sawadogo Hamma Fabien Yonli;Michée Banyua Lompo;Nicolas Kagambega;Pierre Sawadogo(Ecole Supérieure d’Ingénierie, Universitéde Fada N’Gourma, Fada N’Gourma, Burkina Faso;Laboratoire de Physique et de Chimie de l’Environnement, Université Joseph KI-ZERBO, Ouagadougou, Burkina Faso;Mine Service Technique, IAMGOLD ESSAKANE SA, Ouagadougou, Burkina Faso;Laboratoire Géosciences et Environnement, Ouagadougou, Burkina Faso)

机构地区：[1]Ecole Supérieure d’Ingénierie, Universitéde Fada N’Gourma, Fada N’Gourma, Burkina Faso [2]Laboratoire de Physique et de Chimie de l’Environnement, Université Joseph KI-ZERBO, Ouagadougou, Burkina Faso [3]Mine Service Technique, IAMGOLD ESSAKANE SA, Ouagadougou, Burkina Faso [4]Laboratoire Géosciences et Environnement, Ouagadougou, Burkina Faso

出　　处：《Geomaterials》2023年第4期109-123,共15页地质材料（英文）

摘　　要：Knowledge of the state of stability of mining pits is both a basic condition, an essential axis and a safety benchmark for mining operations. This stability is largely based on the knowledge of the rock mass sheltering the mining works and this requires a perfect characterization of all of its structural formations through mapping (manual or digital). The families of discontinuities, namely family 1 (bedding), family 2 (Joint 2) and family 3 (Joint 1) obtained through structural mapping in the Essakane open pit mine, made it possible to analyze the failure modes at the origin of rock instabilities. The respective dips of these different directional families are: 77˚ - 85˚/N 058˚ - 068˚, 66˚ - 74˚/N 133˚ - 143˚, 25˚ - 35˚/N115˚ - 130˚. An average safety factor of 4.3 was estimated for the area with a quality of the rock mass (RMR) estimated at 47. The results obtained reflect on the one hand the risks of instability associated with the quality of the rock mass studied and on the other hand highlights the state of stability of the study area.Knowledge of the state of stability of mining pits is both a basic condition, an essential axis and a safety benchmark for mining operations. This stability is largely based on the knowledge of the rock mass sheltering the mining works and this requires a perfect characterization of all of its structural formations through mapping (manual or digital). The families of discontinuities, namely family 1 (bedding), family 2 (Joint 2) and family 3 (Joint 1) obtained through structural mapping in the Essakane open pit mine, made it possible to analyze the failure modes at the origin of rock instabilities. The respective dips of these different directional families are: 77˚ - 85˚/N 058˚ - 068˚, 66˚ - 74˚/N 133˚ - 143˚, 25˚ - 35˚/N115˚ - 130˚. An average safety factor of 4.3 was estimated for the area with a quality of the rock mass (RMR) estimated at 47. The results obtained reflect on the one hand the risks of instability associated with the quality of the rock mass studied and on the other hand highlights the state of stability of the study area.

关 键 词：Stability CARTOGRAPHY DISCONTINUITIES Safety Factor Essakane 

分 类 号：O17[理学—数学]