Using risk assessment to guide progressive closure planning for the

摘要: The Ok Tedi mine is located in the Western Province of Papua New Guinea (PNG) and owned operated by Mining Limited (OTML), a company that entirely for benefit people PNG. Since mining commenced 1984, OTML has been foremost contributor to economy Under current plan, ore reserves will be mined out 2015; however opportunities are being investigated extend life 2025. have actively planning closure since 1998 aims make an example good practice. adopted risk based approach guide process aligns with Australian Zealand Risk Management Standard (AS/NZ 31000:2009). Mine risks identified open, facilitated workshops attended broad range internal external stakeholders. Two categories identified: residual risks. responsibility not necessarily may remain after closure. were carried forward quantification modelling. model allowed estimate pre-mitigation cost develop optimal mitigation strategy order reduce cost. From included within their allowance contingency provision. Irrespective who owns risks, they process. stakeholder group responsible agreed need assigned owner(s). coordinated explore discuss context possible strategies responsibilities. continue assist stakeholders work through plan One outcome assessment was jointly support study investigate social impacts result from predicted flooding caused derived sediments. also define alleviate long term impacts, assess what role play implementing these strategies. outcomes supported other practice initiatives including: open engagement planning; developing post relinquishment plans; detailed investigation into economic closure; defining costs satisfaction independent auditors.