Double-Bench Mining In Action: Caterpillar 390D & 365C Excavators Load Overburden - Interkat SA

Watch the video below to see this machine in action.

Coordinated Excavation in a Double-Bench Mine Setup

The filmed operation at Interkat SA captures a technically compelling example of double-bench mining—a method that increases productivity by simultaneously exploiting two layers or benches within a pit. Here, the Caterpillar 390D and 365C excavators take center stage, showcasing how varying machine classes can complement each other effectively on the same bench system.

The Cat 390D, a larger, more powerful model, is tasked with heavy stripping duties on the upper bench. Its size and digging depth are well-suited for loading substantial volumes of overburden quickly, minimizing cycle time and reducing truck wait times. Meanwhile, the 365C operates on the lower bench, navigating tighter spaces and handling medium-scale loading tasks. This division of labor leverages each excavator's strengths relative to bench height and haul distances, illustrating a nuanced understanding of machine selection in mining operations.

Optimizing Haul Routes Through Bench Layout

The use of double benches inherently introduces complex logistics due to different elevation levels. At Interkat SA, the haul routes reflect a design aimed at reducing unnecessary travel and turning. Trucks loaded by the 390D on the higher bench enjoy relatively direct paths to the dump points, enabling rapid turnover.

Conversely, the 365C's lower bench position requires careful coordination to avoid bottlenecks and ensure safe traffic flow between benches. Operators must execute precise loading maneuvers within spatial constraints, reducing spillage and maximizing payload efficiency at the shovel face. The video illustrates how experienced operators maintain consistent cycle speeds, even when faced with limited visibility and tight haul corridors.

Technical Challenges and Solutions in Overburden Handling

Handling overburden in a double-bench setting demands acute attention to bench face stability and material fragmentation. Both the 390D and 365C offer hydraulic systems capable of smooth, controlled bucket operation, which is critical when loading varying rock types without causing excessive material collapse.

The operators’ finesse in managing bucket fill factor and swing speed directly impacts downstream processes such as truck loading time and equipment wear. The inter-bench coordination also minimizes surface disturbance, a key factor in maintaining haul road integrity throughout the mining cycle.

Machine Synergy in a Dynamic Mining Environment

This operation exemplifies the symbiotic relationship between excavator models and bench management. The Caterpillar 390D’s powerhouse digging capacity effectively removes bulk overburden, setting the tempo for the mine’s upper-level work. Meanwhile, the 365C’s proportional agility navigates the challenges of the lower bench, maintaining consistent productivity where space constraints might slow larger equipment.

Such tandem deployment underscores the importance of mix-and-match equipment strategies deployed to optimize overall mine site throughput without overburdening a single asset class. At Interkat SA, this not only improves mining efficiency but also extends the service life of machines by preventing overuse.