STUDY OF MINING OPTIMIZATION AT PIT B PT XYZ, BANGKA BELITUNG PROVINCE

• Main Author: MAGISTRA (NIM : 12114071), AGNA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/25109
• Institution: Institut Teknologi Bandung

Effective and efficient mining planning by applying the concept of pit optimization is one of the ways that many mining practitioners use to obtain maximum benefits with minimal costs. This is encouraged by the nature of the Mining industry which is non-renewable and is always faced with many limitations, such as location, type, quantity and quality of commodities. PT XYZ is one of the tin mining companies in Indonesia which plans to design a Pit B. This mining design is consist of feasibility analysis and determitation of the ultimate pit limit of Pit B with the concept of pit optimization. PT XYZ also wanted to know the effect of the decrease and increase in the selling price of tin and the operating cost of Pit B production level. <br /> <br /> Feasibility analysis of Pit B is optimized by Whittle program based on Floating Cone method and Lerschs-Grossmann algorithm which produces pit boundary, tin ore and waste tonnage as output. As for, analysis of the relationship between the selling price of tin and the operating cost of the production level of Pit B was done using same software by changing the input parameters of the selling price of tin and operating cost. <br /> <br /> Optimization results by Whittle program using the tin selling price of US$ 20,200 economical to be mined and feasible to operate, producing 601,484 m3 of reserves from total of 1,571,194 m3 of resources in block 1, and 928,899 m3 of reserves from total of 1,727,705 m3 of resources in block 3. The decreasing and increasing in the selling price of tin is directly proportional to Pit B's production level. The decreasing and increasing operating cost is inversely proportional to Pit B's production level.