Authors : Quintiza Anugerah; Didit Welly Udjianto

Volume/Issue : Volume 8 - 2023, Issue 4 - April

Google Scholar : https://bit.ly/3TmGbDi

Scribd : https://bit.ly/3Hm8f4Q

DOI : https://doi.org/10.5281/zenodo.7878779

Abstract : Reclamation is one of the activities that must be carried out in mining operations. One of the reclamation activities is the closure of ex-mining holes (voids). Not all of these former mining holes (voids) can be closed. However, the effort that can be made by mining business actors is to close voids which can still be closed to minimize the amount of waste, namely acid mine drainage which is accommodated in the mining area. Carrying out reclamation and post-mining activities requires costs. However, this can be minimized by using the right methods and designs. One of these methods is backfilling which has the advantage of setting distances or distances that can be adjusted. Meanwhile, the calculation of the use of tools can be calculated using the simplex method with minimization. This research was conducted at PT. Lamindo Inter Multikon located on Bunyu Island, Bunyu District, Bulungan Regency, North Kalimantan. In this study the results obtained in area 1 a target of 220,000 Bcm can be achieved if using 7 tools. This is in accordance with manual calculations which obtained the number 6.82 and in the POM software through iterative calculations obtained the number 7.26. In area 2 the target of 205,000 Bcm can be achieved using 6 tools. This is in accordance with manual calculations which obtained the number 6.35 and through the POM software through iterative calculations obtained the number 6.142

Keywords : Reclamation, Backfilling, Simplex Method.