scholarly journals Application of MCDA in the determination of optimal block size for open-pit modelling and mine planning

2021 ◽  
pp. 67-85
Author(s):  
Petar Marković ◽  
Dejan Stevanović ◽  
Milica Pešić-Georgiadis ◽  
Mirjana Banković
Keyword(s):  
Optimal Solution ◽  
Block Size ◽  
Mine Planning ◽  
Open Pit ◽  
Affecting Factors ◽  
Mining Operations ◽  
Advantages And Disadvantages ◽  
Mining Project ◽  
Modelling Process

The process of creating a geological block model as the basis for a further detailed design and planning of mining operations is a very responsible task. Errors made during this initial process are transferred to all other phases of the mining project. Certainly, one of the most important decisions for the modelling process is the choice of the appropriate size of the blocks that form the model itself. The determination of the optimal block size is not a simple process, because it depends on a large number of affecting factors and criteria. This process can be significantly facilitated by the application of multi-criteria analysis methods, which enable establishment of interdependence between the criteria in order to select the optimal solution. This paper presents the possibilities of applying the Analytical Hierarchical Process (AHP) method for selecting the optimal block size for the needs of the coal deposit modelling process and mine planning, as well as the way in which this method can significantly facilitate problem solving, by looking at it from several aspects. The analysis included six criteria and four potential solutions, and the results themselves indicated the advantages and disadvantages of the applied method.

scholarly journals Determination of the Artificial Filtering Massif Location for Purification Quarry Wastewaters of Kamyshansky Open Pit Mine

2019 ◽  
Vol 105 ◽  
pp. 02022 ◽  
Author(s):  
Maxim Tyulenev ◽  
Sergey Markov ◽  
Eugene Makridin ◽  
Yury Lesin ◽  
Vyacheslav Gogolin
Keyword(s):  
Water Purification ◽  
Wastewater Treatment Plants ◽  
Water Discharge ◽  
Coal Industry ◽  
Open Pit ◽  
Mining Operations ◽  
Purification Methods ◽  
Settling Ponds ◽  
Overburden Dumps

The most common purification methods in the coal industry are settling ponds and filtering treatment constructions. But in some cases, the use of traditional methods and schemes of water purification is complicated by the conditions of water discharge or does not provide the required water quality. For example, sharp seasonal fluctuations in the level of discharge and water pollution, a large number of spillways distant from each other and a change in their location during the development and moving of mining operations often make it difficult to use expensive and difficult to operate industrial wastewater treatment plants. Often, mining enterprises have a shortage of land areas to place such plants. In this regard, studies have been conducted aimed at identifying the possibility of water purification from suspended solids by filtering in arrays of coarse rock and semi-rock. Such arrays included, first of all, overburden dumps, various technological dams and embankments, as well as specially constructed filter arrays from mining waste. This article presents the results of studies to determine the location of the filter massif in the open pit “Kamyshansky”.

scholarly journals Planetary fracturing and lineaments revealed in the Kovdor magnetite–apatite ore deposit by open pit mining

2020 ◽  
pp. 30-34
Author(s):  
I. B. Agarkov ◽  
◽  
I. M. Ignatenko ◽  
V. A. Dunaev ◽  
I. S. Kryuchkov ◽  
...  
Keyword(s):  
Rock Mass ◽  
Hard Rock ◽  
Laser Scanner ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Operations ◽  
Structural Mapping ◽  
Remote Assessment ◽  
Tectonic Origin

The analysis of the studies into fracturing of Zhelezny pitwall rock mass over the period from 1989 to 2019 proves that planetary fracturing is represented by faults, carbonatite dykes and single fractures oriented in the same direction as the prevailing regional lineaments on the Kola Peninsula. Planetary fracturing is assumed as a system of regular-oriented fractures. The planetary fracturing also includes lineaments of tectonic origin. The scientists think the faults registered in the pitwall rock mass and codirectional with the lineaments will accompany mining operations down to the full depth of the pit, up to the full extraction of magnetite–apatite ore reserves. While preparing this article, the authors have collected, generalized and analyzed the data of geological and structural mapping implemented by VIOGEM’s experts over the period from 1989 to 2019. VIOGEM’s procedure of geological and structural mapping ensures continuous documentation of extensional tectonics at high referencing accuracy (to 50 cm), as well as determination of inaccessible azimuths and angles of fractures by remote assessment of their orientations in pit walls using a laser scanner and photographic techniques to study the structure of hard rock mass and the behavior of permanent benches.

scholarly journals General Application of Multiple Criteria Decision Making Methods for Finding the Optimal Solution in City Logistics

2020 ◽  
Vol 10 (1) ◽  
pp. 147-153
Author(s):  
Jiří Hanzl
Keyword(s):  
Multiple Criteria Decision Making ◽  
Optimal Solution ◽  
Pairwise Comparison ◽  
City Logistics ◽  
Decision Matrix ◽  
General Application ◽  
Advantages And Disadvantages ◽  
Criteria Weights ◽  
Mutual Evaluation

AbstractThe aim of this paper is to familiarize the reader with the general application of MCDM methods on a specific example of City Logistics in order to find the optimal solution for operation of the territory. In its introductory part, methods used for quantitative evaluation of variant solutions are briefly described, and then the so-called Forces Decision Matrix Method (FDMM) including the determination of criteria weights using pairwise comparison of variants according to individual criteria on the specific example is applied. In the final part of the paper, the advantages and disadvantages of using this method for more complex tasks with multiple variant solutions based on the results of the practical example are evaluated and the so-called Saaty’s method based on the quantitative pair-wise comparison to partially eliminate differences in the mutual evaluation of weights and criteria is mentioned.

scholarly journals Determination of the working area of a hydraulic excavator

2020 ◽  
Vol 177 ◽  
pp. 03016
Author(s):  
Nikolay Suslov ◽  
Stanislav Chernukhin
Keyword(s):  
Center Of Mass ◽  
Hydraulic Drive ◽  
Open Pit ◽  
Open Pit Mining ◽  
Technical Solution ◽  
Oil Consumption ◽  
Mining Operations ◽  
Movement Mechanism ◽  
Walking Mechanism

The article discusses the mechanisms of walking used on dragline excavators. The disadvantages of each mechanism are identified and based on this, the most promising movement mechanism is selected – a three-legged walking mechanism with a hydraulic drive. For this mechanism, the main disadvantages are also identified. The following is a technical solution that allows you to save this mechanism from the main drawback – the need to raise the center of mass of the excavator to a significant height to ensure the maximum step value. The technical solution includes the presence of a flat hydrostatic support that allows to increase the efficiency of the mechanism in open-pit mining operations. The calculation of oil consumption through a flat hydrostatic support in the conditions of its use on quarry soils with different bearing capacity is made.

RESEARCH OF THE EFFICIENCY OF USING «GEOVIA SURPAC» AND «MINESCHED» WHEN PLANNING MINING WORKS IN IRON QUARRY

2021 ◽  
pp. 7-15
Author(s):  
Borys Sobko ◽  
◽  
Oleksiі Lozhnikov ◽  
Vladislav Tretyakov ◽  
◽  
...  
Keyword(s):  
Production Control ◽  
Economic Benefits ◽  
Mine Planning ◽  
Production Costs ◽  
Open Pit ◽  
Practical Significance ◽  
Mining Equipment ◽  
Mining Operations ◽  
Mining System ◽  
Ore Minerals

Purpose. Investigate and compare monthly mine planning method using Geovia Surpac and MineSched software. Methods. The computerized research method was used to create a scenario of mining operations in Geovia software for planning monthly operations in the open pit of LLC Eristovsky MPP. Results. It was confirmed that the new software make possible to plan the extraction of ore minerals for a certain period, with the possibility of uniform supply of the concentration plant with ore minerals of the required quality. Also, it became possible to analyze in detail the extraction of minerals from the contours of the open pit and clear production control in the working contours. Scientific novelty. The dependences of the given productivity of mining equipment on the parameters of the mining system elements were established using the MineSched software. The effectiveness of determining the quality of mining minerals is established, when planning for a longer period of time using computer programs in comparison with the old method. The economic benefits of using new software with broader functionality are determined. Practical significance. A new method of planning the ore mass extraction is proposed, which made it possible to supply minerals from the pit with average quality indicators. This contributed to a more efficient product enrichment, which in turn reduced production costs. Also by the new software it was possible to reduce the time for planning mining operations, which led to a decrease in working time to complete the task and, accordingly, reduced the cost of computing operations. Keywords: pit, geological block model, monthly mining plan, Surpac software, Minesched software, batch plan.

scholarly journals Determination of non-hazardous areas in terms of seismic effect for the use of explosives in the open pit in safe conditions

2022 ◽  
Vol 354 ◽  
pp. 00035
Author(s):  
Edward Gheorghiosu ◽  
Daniela Rus ◽  
Ștefan Ilici ◽  
Sorin Mihai
Keyword(s):  
Seismic Waves ◽  
Seismic Intensity ◽  
Seismic Effect ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Operations ◽  
Industrial Buildings ◽  
The Stability ◽  
Mining Work

In addition to the technical and economic advantages of blasting rocks from open-pit mining, this method of extraction can produce effects with a direct impact in the area near the open pit. Blasting works generates effects such as seismic waves that cause vibrations, rock throws, noise and toxic gases. When their intensity and scope are not systematically evaluated and analysed, blasting works can cause serious consequences for people, civil / industrial buildings, the environment, thus affecting the health of the population and the stability / integrity of the buildings / slopes in the vicinity of the mining operations. The paper presents design / determination methods of areas where explosives may / may not be used in conditions of maximum safety in terms of seismic intensity, thus protecting the population and the civil / industrial objectives in the area of the mining work. The obtained results are extracted from a research study carried out for the opening in operation of a new mining deposit, having as reference calculations and theoretical interpretations related to the conditions established for the development of the blasting works.

scholarly journals Theoretical Features of Rope Shovels and Hydraulic Backhoes Using at Open Pit Mines

2018 ◽  
Vol 41 ◽  
pp. 01003 ◽  
Author(s):  
Andrew Strelnikov ◽  
Sergey Markov ◽  
Ludger Rattmann ◽  
Dieter Weber
Keyword(s):  
Western Siberia ◽  
Open Pit ◽  
Open Pit Mining ◽  
Joint Work ◽  
Coal Seams ◽  
Mining Operations ◽  
Open Pit Mines ◽  
Advantages And Disadvantages ◽  
Technical Solutions ◽  
Open Coal

Open coal mining companies in Kuzbass (Western Siberia, Russia) constantly face challenges to increase the economic efficiency of mining operations, reduce coal losses and increase profitability. One of the ways to increase the efficiency of open pit mining is to improve the technology for the development of coal-bearing zones of quarry fields on complex structured inclined and steep deposits. At present, the projects for promising deposits have been completed, and a number of operating open pits conduct the development of coal-bearing zones along their entire width by horizontal layers. The excavating and loading equipment for overburden and mining operations in these zones is diverse: quarry rope shovels, hydraulic backhoes or their joint work. When they work together in the coal-bearing zone, the rope shovels extracts the interbeds, and the hydraulic backhoes extract the coal seams. However, such technical solutions are not sufficiently substantiated. The fact is that rope shovels and hydraulic backhoes have their advantages and disadvantages in operating.

scholarly journals Methodology for a Dump Design Optimization in Large-Scale Open Pit Mines

2017 ◽  
Author(s):  
Jorge Puell Ortiz
Keyword(s):  
Large Scale ◽  
Early Stage ◽  
Mine Planning ◽  
Open Pit ◽  
Open Pit Mines ◽  
Physical Constraints ◽  
Critical Elements ◽  
Mining Project ◽  
Waste Rock Dump ◽  
Mine Dump

Dump design and scheduling are critical elements to effective mine planning, especially if several of them are required in large-scale open pit mines. Infrastructure capital and transportation costs are considerable from an early stage in the mining project, and through the life-of-mine as these dumps gradually become immense structures. Delivered mining rates, as well as certain spatial and physical constraints, provide a set of parameters of mathematical and economic relationship that creates opportunities for modelling and thus facilitates the measuring and optimization of ultimate dump design by using programming and empirical techniques while achieving economic objectives. This paper presents a methodology to model and optimize the design of a mine dump by minimizing the total haulage costs. The proposed methodology consists on: (i) Formulation of a dump model based on a system of equations relying on multiple relevant parameters; (ii) Solves by minimizing the total cost using linear programming and determines a ‘preliminary’ dump design; (iii) Through a series of iterations, modifies the ‘preliminary’ footprint by projecting it to the topography and creates the ultimate dump design. Finally, an example application for a waste rock dump illustrates this methodology.

scholarly journals Determination of bench, dump and road sliding wedge technological parameters

2021 ◽  
Vol 6 (1) ◽  
pp. 31-41
Author(s):  
I. K. Chunuev ◽  
Yu. M. Levkin ◽  
Zh. Bolotbekov
Keyword(s):  
Rock Mass ◽  
Slope Stability ◽  
Open Pit ◽  
Open Pit Mining ◽  
Dump Truck ◽  
Transport Equipment ◽  
Mining Operations ◽  
Stability Calculation ◽  
Mine Surveying

Mine surveying in mining operations is of particular importance, since all technological processes of the full life cycle of a mining enterprise and, ultimately, its competitiveness depend on the surveying quality, efficiency and reliability. Organizations independently determine the structure of mine surveying services, taking into account the methods applied and the scale of mining. To ensure safe open-pit mining of minerals, it is necessary to permanently assess and monitor the pit bench and wall rock mass condition. Misjudgement of rock physical and mechanical properties, non-observance of the minerals mining and transportation process cycle, changes in climatic conditions and other problems lead to loss of stability of rocks in all parts of an open pit, including in the areas of ore production and mining and transport equipment operation. The existing practice shows that the effectiveness of an open pit wall and bench stability calculation can be achieved using a technique that should take into account the slope deformation and failure mechanism, as well as the nature of the stress-strain state of the open pit rock mass. The studies presented in the paper are based on comparative analysis of the sliding wedge parameters for benches, dumps and roads at open pits using analytical and graphical software packages, and taking into account the static load produced by dump trucks. The study findings allow to establish that: determination of the bench slope stability and the sliding wedge width, performed by the analytical method, gives higher accuracy results than those obtained by the graphical method; the bench slope stability and the sliding wedge width depend not only on the rock physical and mechanical condition, but also on the bench height, the dump truck (plus its freight load) weight per 1 linear meter of the placement area, the distance from the slope edge and other factors; the rock mass is stable and not subject to landslide phenomena for as long as the sum of the holding forces is greater than or equal to the sum of the shearing forces; when using large-sized transport equipment of nonstandard weight in open-pit mining, it is necessary to calculate the safe width of the sliding wedges, taking into account the loads on them (per 1 linear meter), the values of which can be 1.5–2.0 times higher than those calculated for the circular-cylindrical sliding surface.

Management and engineering solutions to improve processing stock quality and reduce resource-intensity of mining

2018 ◽  
pp. 56-68
Author(s):  
V. V. Agafonov ◽  
V. Yu. Zalyadinov ◽  
M. E. Yusupov ◽  
N. S. Bikteeva
Keyword(s):  
Development Strategy ◽  
Open Pit ◽  
Mining Operations ◽  
High Concern ◽  
General Production ◽  
Resource Intensity ◽  
Product Output ◽  
And Control ◽  
A Company

Sustainability of mining companies is of of high concern. The problem is specifically acute at companies that are monotownor monosettlement-forming. Sustainability of a mine depends in many ways on product quality and production resource-intensity. This article discusses formation of mineral quality indexes in terms of an open pit chrysotile mine. The studies took into account specific features of operation procedures implemented by each structural division of the mine. The analysis has found managerial and technological inconsistencies which affect quality and marketable product output, as well as efficiency of the mine in whole. The background for efficiency enhancement at a company is, by the authors’ opinion, consolidation of personnel subject to the single development strategy, namely: improvement of production and control efficiency, as well as use of available reserves and resources by means of better setup for production. The proposed approaches to planning mining operations and forming mineral quality allow higher quality of processing stock. In addition, a new model proposed for interaction between structural divisions of a mining company ensures improvement of general production indexes.

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