What is the purpose of using benching techniques in open-pit mining excavation, and how does it improve safety?

Benching techniques in open-pit mining excavation involve creating a series of horizontal steps, or benches, along the sides of the pit. This method serves primarily to improve slope stability and enhance safety. Without benching, the steep, continuous slopes of an open-pit mine are prone to landslides and rockfalls, which pose a significant risk to personnel and equipment. Each bench acts as a catch basin to contain falling rocks and debris, preventing them from rolling down the entire slope and causing damage or injury. By breaking the slope into smaller, more manageable sections, benching reduces the overall height a....