# Optimum Design Of Open Pit Mines Lerchs Grossman

## (PDF) Optimum design of open pit mines - ResearchGate

Optimum design of open pit mines Article (PDF Available) in Bulletin of the Australian Mathematical Society 43(02):349 - 350 · April 1991 with 3,903 Reads DOI: 101017/S0004972700029154 · Source

## Lerchs, H and Grossman, F (1965) Optimum Design of Open

Lerchs, H and Grossman, F (1965) Optimum Design of Open-Pit Mines Transaction CIM, 58, 47-54 has been cited by the following article: TITLE: RETRACTED: Compare Methods of Fix Lead, Milawa NPV and Milawa Balance Algorithm in Optimizing the Production of Open Pit Mines …

## Optimum Design of an Open Pit - SAIMM

obtain the optimum pit fit each level The method makes use of the fact that an optimum pit at a particular level luust be completely contained in any optimum pit at 11 lower level Procedure! for generating block costs, and pits with various slope angles UDder the rcsll'lclion of complete block removal arc considered briefly The main description

## Optimum design of open pit mines - espacecurtineduau

A fundamental problem in open pit mine planning is that of determining the optimum ultimate pit limits of the mine These limits are that pit contour which is the result of extracting a volume of material which maximizes the difference between the value of extracted ore and the total extraction cost of ore and waste whilst satisfying certain practical operational requirements, such as safe

## H Lerchs and I F Grossmann, “Optimum design of open pit

Dec 24, 2014 · H Lerchs and I F Grossmann, “Optimum design of open pit mines,” Canadian Institute of Mining Transactions, vol 68, pp 17–24, 1965 被如下文章引用： TITLE: Production Scheduling of Open Pit Mines Using Particle Swarm Optimization Algorithm

## SURFACE MINE PRODUCTION Helmut Lerchs and Ingo Grossmann

It was 1964 when Helmut Lerchs and Ingo F Grossmann presented their algorithm to find the optimum design for an open pit mine In their words at the time, “the objective is to design the contour of a pit so as to maximize the difference between total mine …

## LERCH-GROSSMAN PIT OPTIMIZATION - Mining Software

CONTENTS:Coordinates of every block that forms part of the optimum pit PREP BY:Lerch-Grossman module FORMAT :Sequential access, unformatted 6-byte records The three fields in the record contain the x, y and z coordinates respectively of a block in the optimum pit (The coordinates are given with respect to IMS model coordinate system)

## Using the Lerchs-Grossman algorithm during open pit mine

Nov 18, 2012 · This is a video showing how to get an optimum pit shell in DesignXL given the blockmodel and the face angle constraints Using the Lerchs-Grossman algorithm during open pit mine design

## Optimized open pit mine design, pushbacks and the gap

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 …

## A new algorithm for optimum open pit design: Floating cone

not able to yield a true optimum pit limit For example, for the 2-D economical block model in Figure 1, when final dip of pit is 1:1, floating cone algorithm cannot produce true optimum pit limit, as presented on Table 1 Nevertheless, by applying dynamic programming method [6] to this model an optimum pit limit with the value of 2

## optimum design of open pit mines lerchs grossman

An application of discrete mathematics in the design , An application of discrete mathematics in the , and IF Grossman, Optimum design of open pit mines, , the Lerchs-Grossman algorithm for open pit design,

## Optimum design of open pit mines - espacecurtineduau

A fundamental problem in open pit mine planning is that of determining the optimum ultimate pit limits of the mine These limits are that pit contour which is the result of extracting a volume of material which maximizes the difference between the value of extracted ore and the total extraction cost of ore and waste whilst satisfying certain practical operational requirements, such as safe

## A new approach to constrained open pit pushback design

Jan 23, 2015 · Lerchs, H and Grossman, IF, Optimum Design of Open Pit Mines, Joint CORS and ORSA Conference, Transactions Canadian Institute of Mining …

## Case Studies In Open Pit Design Using Lerchs-Grossman Pit

Case Studies in Open Pit Design Using Whittle 4D will be discussing the following four examples: 1) Optimization of process plant design using Whittle 4D as a sizing tool In this case, the home office and project team had different views of the size of the final project

## Using the Lerchs-Grossman algorithm during open pit mine

Nov 18, 2012 · This is a video showing how to get an optimum pit shell in DesignXL given the blockmodel and the face angle constraints Using the Lerchs-Grossman algorithm during open pit mine design

## MINING SCHEDULE OPTIMISATION FOR CONDITIONALLY …

Lerchs, H and Grossman, L, 1965 Optimum Design of Open-Pit Mines, Trans CIM, LXVII, 17 – 24 Padberg, M W, 1995 Linear optimization and extensions, Springer, NY, 449 p Ramazan, S and Dimitrakopoulos, R, 2003 Stochastic integer programming based modelling for long-term production scheduling of open pit mines ARC linkage project report N-6002-1

## Mathematical Optimization Models and Methods for Open …

Amankwah, H (2011) Mathematical Optimization Models and Methods for Open-Pit Mining Doctoral dissertation ISBN 978-91-7393-073-4 ISSN 0345-7524 Open-pit mining is an operation in which blocks from the ground are dug to extract the ore contained in them, and in this process a deeper and deeper pit is formed until the min-ing operation ends

## Pseudoflow, New Life for Lerchs-Grossmann Pit Optimisation

The Lerchs-Grossmann (LG) algorithm (1965) has been used for over thirty years for the optimum design of open pit mines

## The use of dynamic programming for open pit mine design

Dynamic programming presents the facilities for solu- tion to the 3-D ultimate pit design problem, which (a) contrary to the moving cone method, will design true optimum ultimate pits, and (b) when compared to the Lerchs-Grossman algorithm has the advantage of considerably smaller computer storage and computing time requirements

## THE SELECTION OF OPTIMAL CONTOUR OF OPEN PIT …

THE SELECTION OF OPTIMAL CONTOUR OF OPEN PIT "DELICI" NEAR UGLJEVIK Stojanovic B Lazar1, Tomic J Petar1, Determination of the optimal pit contour presents the key in the planning and mine design, because it Whittle™ Lerchs Grossman optimizer [3] The mine boundaries were determined by combination of

## INTERNATIONAL JOURNAL OF SCIENTIFIC - ijstrorg

the last 45 years With development of the mining model, a pit design tool that facilitates the best overall theoretical cash flow mining sequence through the deposit could be applied The mine design tool is referred to in the mining industry as "Optimizer" and is based …

## GEOVIA WHITTLE - 3D Design & Engineering Software

GEOVIA Whittle – Pseudoflow Method for Pit Optimization – White Paper 2 Figure 2 A graph representation of pit optimization problem in Figure 1 Maximum Closure and Optimal Pit The precise definition of a pit with valid slopes is termed a “closed set” or “closure” It refers to a set of nodes that have no arcs out of the set

## Saimm 201406 jun by SAIMM - Issuu

May 22, 2015 · A heuristic sublevel stope optimizer with multiple raises One limitation off the proposed approach is the restriction to vertical raises It would cause a higher dilution rate for scenarios of

## Optimum design of open pit mines - cambridgeorg

Optimum design of open pit mines LM GlANNINI A fundamental problem in open pit mine planning is that of determining the op-timum ultimate pit limits of the mine These limits are that pit contour which is the result of extracting a volume of material which maximises the difference between the

## Analyzing solutions of the openpit - Inside Mines

Analyzing solutions of the openpit block sequencing problem obtained via Lagrangian techniques by WB Lambert and AM Newman Abstract n A common decision in openpit mining is to determine the extraction sequence of notional three-dimensional production blocks so as …

## Optimum design of open pit mines - cambridgeorg

Optimum design of open pit mines LM GlANNINI A fundamental problem in open pit mine planning is that of determining the op-timum ultimate pit limits of the mine These limits are that pit contour which is the result of extracting a volume of material which maximises the difference between the

## Optimum design of open pit mines - CORE

Abstract A fundamental problem in open pit mine planning is that of determining the optimum ultimate pit limits of the mine These limits are that pit contour which is the result of extracting a volume of material which maximizes the difference between the value of extracted ore and the total extraction cost of ore and waste whilst satisfying certain practical operational requirements, such

## lerch grossman open pit scheduling

optimum design of open pit mines lerchs grossman An application of discrete mathematics in the design , An application of discrete mathematics in the , and IF Grossman, Optimum design of open pit mines, , the Lerchs-Grossman algorithm for open pit design, Get Price

## Application of Lerchs-Grossman Pit Optimization to the

Definition of the optimum open pit, whether an intermediate phase or final design, will be sensitive to many factors The most basic will include geological and mining constraints, mining and processing costs, pit slopes and product prices The application of the three dimensional Lerchs-Grossmann pit optimization procedure to this task is described for a range

## Design and Evaluation of Open-pit Operations | SpringerLink

Phillips, D A (1972) Optimum design of an open-pit, in Proceedings of the 10th APCOM Symposium (eds M G D Salamon and F H Lancaster ), South African …

## The formula at the heart (and mind) of mine plan

Lerchs, H, & Grossman, I (1965) Optimum Design of Open-Pit Mines Transactions of the CIM , LXVIII, 47-54 [1] I put these in quotation marks as these terms are not technically correct and are the source of some confusion with practitioners We will discuss this later [2] Optimising a combined open pit and underground strategic plan, 2008 This paper looked at the decision making around whether to extract …

## Saimm 201406 jun by SAIMM - Issuu

May 22, 2015 · A heuristic sublevel stope optimizer with multiple raises One limitation off the proposed approach is the restriction to vertical raises It would cause a higher dilution rate for scenarios of

## A new algorithm for the open-pit mine scheduling problem

For a detailed treatment of open-pit mine planning see Hustrulid and Kuchta [18] The planning phase of a mine is typically subdivided into a number of steps which are solved sequentially in order to obtain a tentative production schedule Because it is di cult to nd a concise and formal description of the mine planning phase in the literature, and

## Optimizing Open Pit Block Scheduling with Exposed Ore …

Since the introduction by Lerchs and Grossman (1965) of a model that is now considered a classic in the subject, open pit design by means of Operations Research models has reached a level of maturity and acceptance by industry becoming fundamental in every mining endeavor They proposed a

## optimisation of open pit (Lerchs and Grossman, 1965; Whittle,

Optimum design of open pit mines (PDF Download Available) Oct 13, 2016 , Official Full-Text Publication: Optimum design of open pit mines on , In particular, the Lerchs-Grossman graph-theoret ic method is shown to be , However, the open pit production …

## Pseudoflow, New Life for Lerchs-Grossmann Pit Optimisation

Lerchs, H and Grossmann, I F, 1965 Optimum design of open pit mines, Chen, T, 1976 3-D pit design with variable wall slope capabilities, in Joint CORS and ORSA Conference, Montreal, May, in Transactions Proceedings 14th APCOM, pp 615-618 (Pennsylvania …

## A defining the optimal point of opening and developing a

Acta Montanistica Slovaca Ročník 19(2014), číslo 1, 47-59 47 A defining the optimal point of opening and developing a surface pit mine Ivo Galić1, Dragan Krasic2 and Tihomir Kneziček3 Contemporary methods of projecting surface pit mines are applicable exclusively by …

## An application of discrete mathematics in the design of an

Abstract The assumption tan a2 = 2 tan al makes the wall slope angle a, achievable by taking two blocks along and one up repetitively in moving to the right along the pit contour Design of an open mine 17 Let rij denote the value of the decision variable r at block (i, j) of a cross-section