Optimization of the Excavator-and-Dump Truck Complex at Open Pit Mines – the Case Study Nuray Demirel, Amir Taghizadeh, Samer Khouri and Ekaterina Tyuleneva E3S Web Conf., 41 (2018) 01006 Published online: 26 June 2018 DOI: 10.1051/e3sconf/20184101006