RANCANGAN SISTEM PENYALIRAN TAMBANG PADA TAMBANG BIJIH NIKEL PIT HILL ANYER

This study aims to design a mine drainage system to overcome the problem of inundation on the pit floor due to high rainfall. Based on hydrological analysis using 15 years of rainfall data (2009-2023), the Gumbel distribution method was selected with a planned rainfall of 75 mm, rainfall intensity of 16.38 mm/hour, and rainfall return period of 2 years. There are four rainfall catchments in the pit area, and the mine drainage system design includes open channels, culverts and settling ponds. The dimensions of the channels and culverts are designed based on the runoff water discharge of each DTH. The settling pond consists of three compartments with a maintenance time of 100-1292 days. This design is expected to be effective in managing runoff water to support mine operations. Keywords: Goodness of Fit, Mine Conveyance System, Settling Ponds