Pit Optimiser works with block models, using the Lerchs Grossman or Push and Relabel algorithm to determine if a block is mineable and to develop the optimum pit design. The only input required is tonnage and grade information. Pit Optimiser provides different options for Financial, Optimisation and Analysis scenarios. Financial
GEOVIA Whittle – Pseudoflow Method for Pit Optimization – White Paper 1 FROM LERCHSGROSSMANN TO PSEUDOFLOW: A SHORT REVIEW The general pit optimization procedure works based on two inputs: block values and pit slopes, where the slopes introduce constraints on removal precedence of the blocks. The output of
(Lerch and Grossmann, 1965; Dimitrakopoulos et al., 2007). It is also used in mining optimisation software as the industry standard, for example in NPV Scheduler and Gemcom's Whittle software packages (Whittle, 1998, 1999), to ﬁnd the optimal pit and pushbacks. The algorithm uses diﬀerent revenue factors to generate a valuebased
OPTIMIZED OPEN PIT MINE DESIGN, PUSHBACKS AND THE GAP PROBLEM—A REVIEW 511 JOURNAL OF MINING SCIENCE Vol. 50 No. 3 2014 Fig. 3. Graph G with dummy node x0 and arcs added from the dummy node x0 to all other nodes. It is clear from the definition of our graph G that a graph closure in G represents a physically feasible pit, if not, then a block not in our closure violating .
modelling, pit optimisation and pit design, and Surpac MineSched for the LOM scheduling. LerchsGrossmann (LG) pit optimisation method was employed in determining the optimal pit. The following key parameters were employed in designing the optimal pit: .
One of the main obstacles in using Mixed Integer Linear Programming (MILP) formulations for open pit production scheduling is the size of the problem. The main objective of this paper is to present and implement a practical MILP formulation for open pit production scheduling problem. To reduce the number of binary integer variables in the formulation, we aggregate blocks into larger units ...
Enterprise Optimisation, often nicknamed the "Money Mining" approach, is underpinned by Prober software developed by Jeff Whittle, founder of the Whittle business and the developer of the original Whittle Pit Optimisation software that has become the industry standard for mine planning over the last three decades. Jeff,
Lerch Grossman final pit The pit value is 24 financial unities and the blocks at the pit limit are highlighted. The same section was used as input into the algorithm using the Python programing language. The output is presented in figure 10. The same blocks are selected to be .
Oct 17, 2011· "Whittle" computer software that uses the LerchGrossman algorithm, which is a 3D algorithm that can be applied to the optimisation of openpit mine designs. The purpose of optimisation is to produce the most cost effective and most profitable openpit design from a resource block model.
Improved Confidence in an Open Pit Study. ... A method of precise pit optimization commonly used in the mining industry is the Lerch Grossmann method. The technique ... Contact Supplier
Open Pit Optimization Strategies for Improving Economics of Mining Projects Through Mine Planning Mining Engineering Department, Colorado School of Mines. Golden, Colorado, USA ABSTRACT: The open pit design and scheduling problem is a largescale optimization problem that has
Optimum pit design plays a major role in all stages of the life of an open pit: at the feasibility study stage when there is a need to produce a wholeoflife pit design; at the operating phase when pits need to be developed to respond to changes in metal prices, costs, ore reserves, and wall slopes; and towards the end of a mine's life where the final pit design may allow the economic termination of a project.
Consulting Pty Ltd ("Cube") to run pit optimisations using Whittle 4D. Conceptual Mine Optimisation ACap outsourced the pit optimisation work to Cube. SRK has therefore been provided with, and has placed reliance on, the results from Cube's optimised pit shells. Two price scenarios were generated, one using USD55/lb U 3O 8 and a second ...
May 31, 2011· "Whittle" computer software that uses the LerchGrossman algorithm, which is a 3D algorithm that can be applied to the optimisation of openpit mine designs. The purpose of optimisation is to produce the most cost effective and most profitable openpit design from a resource block model.
The ultimate pit for the design was chosen by using the LerschGrossman algorithm (Lersch and Grossman, 1965) and the procedure similar to that used in Whittle FourX software. The ultimate pit contains 191 million tonnes of rock and ( million tonnes of .
Whittle Technology Ltd (WTL) provides optimisation software for the mining Whittle Technology Ltd is a company that specialises in mining optimisation software, and its application to strategic mine commodity (iron ore and coal) miners need to be able to schedule the extraction sequence over the life of the mine, which canpan for software aims ...