Slope instability of openpit mines has adverse impacts on the overall mine profitability, safety and environment. The slope of an openpit mine is crucially influenced by the slope geometry, quality of rock mass and presence of geological features and their properties. The objective of this study is to demonstrate a method to select the optimal overall slope angle of openpit mines according ...
This model, based on exploration and drillhole data, must capture the structure of the ore and provide accurate economic, metallurgical, grade and geotechnical that allow mining engineers to establish the economic potential of the body and the viability of mining the ore body.
7. Digging Capacity of Shovel No. Description Value 1. bucket size m3 2. fill factor for well blasted rock = 80% 3. average bucket capacity = x m3 4. swing time second 28 5. passes per minute, continuous operation 60/28 6. cubic metre per hour continuous x 60/28 x 60 787 7. swell factor 67% 8 ...
(264).An application for the conversion to a new order mining right will be submitted during F2008. The Gloria mining lease (ML11/83) comprises an area of 1 hectares and is located on portion 1 of the farm Gloria (266). An application for the conversion to a new order mining right will be submitted during F2008. GEOLOGY
Mining of minerals is essential for our daytoday life so is the groundwater. Mother Earth is the custodian of these two essential commodities, and both are part and parcel of sustainable living for human beings. This chapter of book focuses on the need, quantity, quality, and management of groundwater encountered in mines, from where extraction of minerals takes place.
INTRODUCTION. In openpit mining, there is a clear trend of excavating mines of increasing depths (Figure 1a).Owing to the increased efficiency of mining equipment and improved exploration techniques and technology, the ore bodies left to be exploited are deeper (Figure 1b).The deeper a mine is, the higher the effect of pitwall steepness on the amount of waste rock to be excavated and ...
The utilization of mining area in the Leeuwfontein pit improved from 71% to 90%, and the blasting frequency reduced by 14% while the average blast size increased by 17%. The distance travelled during shovel relocations between mining phases reduced by 16%, and the lost time associated with drills relocating reduced by 53%.
The stability of slopes in open pit mines is an issue of great concern because of the significant detrimental consequences instabilities can have. To ensure the safe and continuous economic ...
The longterm planning of open pit mine is a dynamic process and should be reviewed periodically for enhancing the NPV and life of mine. Pit optimization through soft computing can be gainfully applied to resolve a number of important problems that arise in developing suitable planning strategies and man agement of a mine.
The open pit mining load and haul system has been a mainstay of the mining industry for many years. While machines have increased in size and scale and automation has become an important development, there have been few innovations to the actual load and haul process itself in recent times. This research highlights some of the potential productivity and safety benefits that the incorporation ...
Blasting 1 m 3 ore rock needs foam consumption of m 3. Foam dust removal technology is mostly used in areas with hot climates and water deficient. The dust reduction efficiency of covering the blast area with foam is up to %, and the ventilation time of openpit mines can be reduced by 2/33/4.
The stability of high jointed slopes has an important impact on the construction of engineering projects. Herein, aiming at the high jointed slope of mine, by combining the jointed finite element method (JFEM) and the discontinuous deformation analysis (DDA) method, a wholeofprocess analysis method was proposed from identification of the slope stability and risk assessment to later ...
4. Although the basic concept of an open pit is quite simple, the planning required to develop a large deposit for surface mining is a very complex and costly undertaking. At one mine, it may be desirable to plan for blending variations in the ore so as to maintain, as nearly as possible, a uniform feed to the mill. At another operation it may be desirable to completely separate two kinds of ...
effective for smallscale operations. Most bauxite, iron, and copper ore is mined by open pit techniques, lead and zinc ore are principally extracted by underground mining methods, and precious metals, particularly gold and most notably in the USA and Australia, tend to be recovered in recent years from lowgrade deposits by surface mining.
In India many of the mines are working on with opencast mining and most of the mining operations are performing with drilling and blasting. The opencast working plays a crucial role in mining because of the improved productivity, recovery and safety of mining operation. The topic is OPTIMIZATION OF BLASTING OPERATION.
Technology Coal mining S Shoniza Irfan Recommended Basics of openpit mining SATYANARAYANA I views • 26 slides Topic 5: Mining MethodsPart ISurface mining Geology Department, Faculty of Science, Tanta University views • 75 slides Mining Methods VR M views • 78 slides
Openpit mine: Chuquicamata copper mine, Región de Antofagas ta, Chile L oc al it y : R eg ió n d e An t of ag as t a, C h ile. Pit dimensions : km long x 3 km wide x 850 m deep.
In this study, vibration sensors were used to measure blastinduced ground vibration (PPV). Different evolutionary algorithms were assessed for predicting PPV, including the particle swarm optimization (PSO) algorithm, genetic algorithm (GA), imperialist competitive algorithm (ICA), and artificial bee colony (ABC). These evolutionary algorithms were used to optimize the support vector ...
a case study that focuses on the longterm production planning of an openpit iron ore mine in India. The stochastic production scheduling was performed. For stochastic modelling, only the geological uncertainty or risk was considered; however, any other uncertainty can be incorporated with the additional computational burden.
Mechanical extraction methods employ mechanical processes in a relatively dry environment to mine minerals from the Earth's crust. In contrast, aqueous methods involve water, or occasionally other liquids, to extract minerals. The surface mining methods can be classified as shown here. We will discuss the mechanical extraction methods in this ...
In an open pit mining operation, the heterogeneity of the gradetonnage distribution of the deposit dictates that all available material within the boundaries of an open pit may not be processed.
Amankwah, H. (2011). Mathematical Optimization Models and Methods for OpenPit Mining. Doctoral dissertation. ISBN . ISSN . Openpit 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 mining operation ends.
Therefore, new methods for dump design optimization are of the highest priority in mine planning management. 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 of: (1) formulation of a dump model; (2) solves by using linear programming and ...
Open pit mining method is one of the surface mining methods that has a traditional coneshaped excavation and is usually employed to exploit a nearsurface, nonselective and lowgrade zones deposits. It often results in high productivity and requires large capital investments, low operating costs, and good safety conditions.
AskariNasab et al. (2010) applied MILP formulations to an open pit iron ore mine production schedule and compared their results to an industry strategic mine planning software, Whittle ( GEOVIA ...
Figure 4 is a 3D view of the four phasepits of the optimized phase plan, where phase4 pit is also the best ultimate pit. Figure 5 is a vertical cross section of the phasepits superimposed on the coal seams in the column model. The direction of phase expansion can be clearly seen from these figures. One can also see the rationality of the optimization results from the spatial relationship ...
Openpit mining technology. Openpit mining clearly offers a number of economic advantages over underground mining, especially now that mineralprocessing technology has advanced to the stage where very lowgrade ores can be treated profitably. 100 to 150 years ago, this was not the case, and mining was still much more selective.
The profit function can also be formulated in unit values (per ton or cubic meter of ore), by assigning a unit profit function L ′ (/h), which is given by (2) L ′ = T U V − M − E R − B − F P. In all these variables, there are two geological characteristics, which have great importance: the stripping ratio R and the grade of ore is therefore essential to determine what their ...
Cost decreased at an optimum fragmentation size in the surface mining operation and production [7,8].The back bone of the blast results quality in surface mining is the efficiency and cost of ...
The mine supply chain usually contains three stages, which is mining, processing, and ore product transportation. This paper tackles the difficulty of variable cutoff grade by establishing a robust optimization model. To solve the robust optimization model, the nonlinear constraints in the model were linearized first.
Selecting reasonable blasting parameters of ore and rock is an important measure to achieve good blasting effect. In the mining process, rock fragmentation is an important index to evaluate the blasting effect, which directly affects the technical scheme, equipment selection, economic effect, and other issues of the mine and even seriously threatens the sustainable safety production of the mine.
In the production process of openpit mines, trucks are applied in the production process of openpit mines for transporting ores and rocks. Most openpit mines are equipped with dozens of trucks. It is important to plan the dispatch of trucks in the production process so that the transportation process can be the shortest in distance, the lowest in cost, and the most efficient. At present ...
Blasting performance is influenced by mechanical and structural properties of the rock, on one side, and blast design parameters on the other. This paper describes a new methodology to assess rock mass quality from drillmonitoring data to guide blasting in open pit operations. Principal component analysis has been used to combine measurement while drilling (MWD) information from two drill ...
Science Open pit mining is the process of mining a near surface deposit by means of a surface pit excavated using one or more horizontal benches. The term open pit mining is usually used for metallic or nonmetallic deposits and sparingly used for bedded deposits like coal. Prof. Professor at University of Mysore Follow
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