MINING SEQUENCE DESIGN IN BLOCK A2 PIT 4 PT. ANUGRAH HARISMA BARAKAH

Abstract

Block A2 pits 4 is a block at Anugrah Harisma Barakah Inc. which is planned to be mined, but this block has not yet carried out a mining sequence design . This study aims to determine the mining sequence design based on production targets in Block A2 pit 4 at Harisma Barakah Inc. Award. Based on the results calculations obtained the amount of reserves with Cut off Grade Ni 1.4% and the density value of overburden and ore material is 1.5 tons/m3 with the mining recovery set by the company 90% obtained 895,790.7 tons. it can be calculated the mine life of Block A2 p it 4 with a production target of 140,000 tons/month so that 7 months of mine life is obtained. Sequence design is made based on the highest elevation to the lowest elevation. sequence 1 with a total tonnage of 16 8,054 tons. 2nd month's sequence with a total of 15 6,434 ore tonnage tons. in the 3rd month sequence with a total tonnage of ore 161 . 705 tons. The 4th month sequence has a total tonnage of ore 1 7 0 . 292 tons. The 5th month sequence with a total tonnage of ore 15 7. 975 tons. the 6th month sequence with a total tonnage of ore 1 56. 377 tons. And the 7th month sequence with a total ore tonnage of 24 . 486 tons.

Keywords: Mine Design, Sequencing Design.