Technical analysis of shovel working time towards inter-burden production achievement in open-pit coal mine

Abstract

Shovel production can be affected by several factors, such as shovel working time and working conditions. The shovel production for the inter-burden removal target did not achieve at mining operations in Melak, East Kalimantan. This study’s main objective is to find the causes of the inadequate production and the efforts to improve. In this case study, the high delay due to the waiting for truck maneuvering caused the lack of shovel production. Some corrections were needed on the width of the loading point, and the loading method required to be replaced with double-side loading. Changes in the width of the loading point and loading method have an impact on increasing shovel productivity. In addition, a digger working time simulation is performed based on secondary data. Calculation of total production achievement is based on the simulation of time categories with working, standby, and repair time variables.

Development of an Integrated Model for Open-Pit-Mine Discontinuous Haulage System Optimization

“…Because of high capacities, excellent flexibility, and relatively low operating and capital costs, excavators and dump trucks represent the most widely used load-and-haul method in open-pit mines [20]. Considerable attention has been paid to the factors that affect excavator performance [21], especially during the bucket cycle [22,23]. The most commonly used excavators are hydraulic and electrical rope shovels [24] because of their compactness and a broad range of capacities and possible bench heights.…”