Planning of mining water management costs

Abstract

The mine drainage system can be a complicated process, although it has been done a lot of time. It depends on the conditions of the location and requirements of the dig with the purpose to get into the mine are not interfering with mining activity. This paper investigates and analyzes the costs of mine water management at the Pit B of PT Darma Henwa Bengalon site, using the variable costing method. Based on the study result, it founds that the cost of forming an open channel with the geometry of the upper width = 5.17 m, lower width = 2.6 m, channel height = 2.24 m, sloping channel length = 2.57 m, is Rp 36,808,096. The cost to make the Panels 1 and 2, Panels 2 and 4, and the Panel 3 Sumps that use PC1250 and HD465 are Rp 3,920,833,504. The costs for investment, the installation of pipes and pumps, and an operational cost at the beginning of mine dewatering is Rp 63,426,709,520. In the form of open channel cost sump formation, and pumping cost consists of components in the form of employee salaries, asset equipment costs, material costs, and indirect costs. Decision making with pump investment is more profitable than the rental concept because the mine life is over five years, but if the mine life is less than five years, the concept of rental is recommended.