An Investigation to Integrate Optimum Long-Term Planning with Short Planning in Underground Mine Production Scheduling
MetadataShow full item record
Generating short- and long-term mine production schedules in isolation and independently from each other means that only a local optimum can be achieved when each scheduling phase is carried out. The globally optimal solution however, can be achieved when integrating scheduling phases and accounting for the interaction between short-term and long-term activities simultaneously. This paper addresses the task of integrating short- and long-term production plans by combining the short-term objective of minimising deviation to targeted mill feed grade with the long-term objective of maximising net present value (NPV) into a single mathematical model. A case study is presented which compares the present values of the same stope data set scheduled via separate long and short-term models and than by the proposed integrated model which applies a predetermined penalty for each tonne of metal deviation to target for the respective ore tonnage being processed. This allows an operation to obtain a globally optimal scheduling regime when taking into consideration the cost and loss of value resulting from fluctuations in grade to the mill over the short-term.
Showing items related by title, author, creator and subject.
Nehring, M.; Topal, Erkan; Knights, P.; Kizil, M. (2012)The development of short- and medium-term mine production schedules in isolation from each other has meant that only a local optimum can be achieved when each scheduling phase is carried out. The globally optimal solution, ...
Suenaga, Hiroaki (2007)A recent increase in the level and volatility of regional gas prices has followed an extensive discussion on potential returns from short-term LNG trading and potentially fostering integration of geographically sparse ...
Immediate effects on adult drinkers of exposure to alcohol harm reduction advertisements with and without drinking guideline messages: experimental studyWakefield, M.; Brennan, E.; Dunstone, K.; Durkin, S.; Dixon, H.; Pettigrew, Simone; Slater, M. (2018)© 2018 Society for the Study of Addiction Aims: To compare the immediate effects on drinkers of television advertisements focusing upon short- versus long-term harms with and without low-risk drinking guidelines. Design: ...