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Hary Triekurnianto Budhyono
Sustainable mine closure is a challenge for mining industries to contribute to sustainable development that requires long range planning. The objective of this research is to arrange a design of sustainable minerals mine closure system consisting of some scenarios toward sustainability of development and community existence in Mimika District after PTFI operation. Methods used to analyze the data included closure risk factor (CRF),
ECM (exponential comparison method), ISM (interpretative structural modeling), AHP (analytical hierarchy process), Benchmarking analysis, and Dynamic System. The CRF analysis indicated that the total value of PTFI closure risk factor is 2,773 corresponding to an extreme closure risk rating. Benchmarking analysis showed that Australia and Canada are feasible benchmark target countries for Indonesia. The criteria of health and safety of community is a criteria with the highest discrepancy average value (-20,029) compared with nine other criteria of key sustainable mine closure success factors that should be applied in Indonesia to achieve Australian and Canadian standards. The AHP analysis demonstrated that the best alternative for sustainable mine closure is integrated planning based on the optimal utilization of natural resources applied from the beginning of mining operation (weight 0.594). To create sustainability after PTFI mining operation, all PTFI’s stakeholders should be focused to develop the economic and social activities to replace full dependence on PTFI. The Dynamic system analysis showed that sustainability for social, economic, and environmental aspects in Mimika District cannot be achieved if the mining benefit and development activities are managed as usual or in the present condition until PTFI’s mining closure. This research resulted four alternatives scenario policy of sustainable mine closure. The best scenario for implementation in Mimika District is very optimistic scenario that applied in 2017. This scenario to be resulted: the sustainability point to be achieved in 2028 or 13 years before PTFI’s mining closure, Mining Benefit Transformation Result Value (MBTRV) – Mining Benefit Average Value (MBAV) is 59,01 quintillions rupiah and to have MBTRV is 149.42 quintillions rupiah when PTFI’s mining closure, increasing of environmental quality value 62.71% when PTFI’s mining closure compared with before applied scenario, conflicts potential is emerging in 2030 and conflicts occurrence is happened in 2035.
Key words: sustainable mine closure, dynamic system, benchmarking analysis, sustainable development, minerals, indicators, scenarios, PT Freeport Indonesia
Under Direction of Santun R.P. Sitorus, Hariadi Kartodihardjo, and Marimin Post Graduate, Intitut Pertanian Bogor. Indonesia. 2009.