In open-pit mines,pit slope as one of the important parameters affects the mine economy and total minable reserve,and it is also affected by different uncertainties which arising from many sources.One of the most crit...In open-pit mines,pit slope as one of the important parameters affects the mine economy and total minable reserve,and it is also affected by different uncertainties which arising from many sources.One of the most critical sources of uncertainty effects on the pit slope design is rock mass geomechanical properties.By comparing the probability of failure resulted from deterministic procedure and probabilistic one,this paper investigated the effects of aforesaid uncertainties on open-pit slope stability in metal mines.In this way,to reduce the effect of variance,it implemented Latin Hypercube Sampling(LHS)technique.Furthermore,a hypothesis test was exerted to compare the effects on two cases in Middle East.Subsequently,the investigation approved high influence of geomechanical uncertainties on overall pit steepness and stability in both iron and copper mines,though on the first case the effects were just over.展开更多
Blending contributes to create an opportunity to achieve the target feed material and helps optimize the run of mine(ROM)material.In addition,it allows mixing different materials and achieving a wide range of quality....Blending contributes to create an opportunity to achieve the target feed material and helps optimize the run of mine(ROM)material.In addition,it allows mixing different materials and achieving a wide range of quality.Then,multiple destinations can be considered for ROM.The present study seeks to develop a Mixed Integer Programming(MIP)model for the production scheduling of an iron ore mine.Based on this model,different destinations are considered for mine products with different specifications.To this aim,ten scenarios were considered with a number of different destinations.The results indicated that the maximum NPV in the multiple product scenarios is about 15%more than that of the single product scenarios.Further,30 realizations were used to evaluate the effect of grade and tonnage uncertainty.The reliability of the production plan was approximately 61.07%and 62.81%in the first and second period of exploitation,respectively.展开更多
文摘In open-pit mines,pit slope as one of the important parameters affects the mine economy and total minable reserve,and it is also affected by different uncertainties which arising from many sources.One of the most critical sources of uncertainty effects on the pit slope design is rock mass geomechanical properties.By comparing the probability of failure resulted from deterministic procedure and probabilistic one,this paper investigated the effects of aforesaid uncertainties on open-pit slope stability in metal mines.In this way,to reduce the effect of variance,it implemented Latin Hypercube Sampling(LHS)technique.Furthermore,a hypothesis test was exerted to compare the effects on two cases in Middle East.Subsequently,the investigation approved high influence of geomechanical uncertainties on overall pit steepness and stability in both iron and copper mines,though on the first case the effects were just over.
文摘Blending contributes to create an opportunity to achieve the target feed material and helps optimize the run of mine(ROM)material.In addition,it allows mixing different materials and achieving a wide range of quality.Then,multiple destinations can be considered for ROM.The present study seeks to develop a Mixed Integer Programming(MIP)model for the production scheduling of an iron ore mine.Based on this model,different destinations are considered for mine products with different specifications.To this aim,ten scenarios were considered with a number of different destinations.The results indicated that the maximum NPV in the multiple product scenarios is about 15%more than that of the single product scenarios.Further,30 realizations were used to evaluate the effect of grade and tonnage uncertainty.The reliability of the production plan was approximately 61.07%and 62.81%in the first and second period of exploitation,respectively.
