open pit mine design factors

Stability Analysis and Design of Open

Open-pit mining is widely used in China. The open-pit mining ratio of iron ore, non-ferrous, chemical industry and building materials 90%, 50%, 70% and 50%,is respectively [9]. It was estimated that about 4.91010 ton coal reserves can be mined by open-pit mining Chinain . About 12%-14% of the total coal production will be mined by open-pit Get price

The Role and Importance of Geotechnical Engineering for a

Open Pit Mining. The value of open pit mining operation is primarily driven by ore vs. waste strip ratio. The less waste to move to extract ore, the higher the revenue that open pit mine generates. Open pit slope geometry (or slope angles) is at the core of mine design, it is determined based on rock mechanics principles by geotechnical engineers. Get price

How can metal mining impact the environment?

Open pit mining disturbs larger areas than underground mining, and thus has larger visual and physical impacts. As the amount of waste rock in open pit mines is commonly two to three times the amount of ore produced, tremendous volumes of waste rock are removed from the pits and deposited in Get price

Stability evaluation and optimal excavated design of rock

Mar 01, 2008Rock slope deformation stability for Antaibao open pit coal mine under mining was analyzed using finite difference technique (FLAC 3D).Optimal excavated scheme with relatively steeper slope angle of 47 instead of 30 was successfully implemented at the west wall on the geological section 73200 of the mine area, where the three-dimensional (3D) effect of nonlinear large deformation of the Get price

Surface Mining Methods and Equipment

Figure 1c. Processed ore by minerals for open pit and underground metal mines for the period 1988 to 1997 in the western world Larger mines offer higher productivity and lower operating costs than smaller mines. Furthermore, open pit mines, typical of larger operations, have much higher normal Get price

H BLASTING IN SURFACE EXCAVATION

Figure 4: Design of each blasthole detonatin g separately (After AECI) 2. Chevron patterns A closed chevron pattern (Figure 5) produces a high profile rock pile with a possible secondary fragmentation due to impacts between rocks projected from opposite directions. An open chevron patterns gives evenly spread rock piles Get price

The Three Phases of Mine Planning

Nov 14, 2014The schedules include pit stage selection (chosen from a series of nested pit shell candidates and not based on the sub-optimal criteria of revenue factor 1!), determination of an NPV driven mining sequence and application of mining practicalities. Best practice pit shell generation requires careful preparation of input parameters, including Get price

Dilution and ore loss – A short practical guide

Mining Blast monitoring is a n essential consideration for open pit operations, with blast movement undoubtedly the single biggest input factor to ore loss and dilution. Case studies have shown that electronic blast movement monitors (BMM) are far superior to pol y pipe BVI's, with numerous published Get price

Equipment Selection for Surface Mining: A Review

equipment, which may include a mining loader, shovel or excavator. Loaders lift the ore or waste material onto the trucks for removal from the mine. In an open-pit mine, loader types can include electric rope, hydraulic excavators including backhoe excavators, and front-end loaders (also called wheel loaders) (Er˘celebi and K rmanl, 2000). Get price

Slope Design and Implementation in Open Pit Mines

and also limitations through case studies of slope design in open pit mines. Keywords: slope stability, slope design, engineering geology, fault, open pit mines, SOMAIR uranium mine, OCP phosphate mine 1. INTRODUCTION Slopes of mines and quarries, some of which may reach several hundred meters deep, must be Get price

Equipment Selection for Surface Mining: A Review

equipment, which may include a mining loader, shovel or excavator. Loaders lift the ore or waste material onto the trucks for removal from the mine. In an open-pit mine, loader types can include electric rope, hydraulic excavators including backhoe excavators, and front-end loaders (also called wheel loaders) (Er˘celebi and K rmanl, 2000). Get price

The Role and Importance of Geotechnical Engineering for a

Open Pit Mining. The value of open pit mining operation is primarily driven by ore vs. waste strip ratio. The less waste to move to extract ore, the higher the revenue that open pit mine generates. Open pit slope geometry (or slope angles) is at the core of mine design, it is determined based on rock mechanics principles by geotechnical engineers. Get price

Functional Optimization of Open Pit Mine Design

Table of ContentsCross Section Input DataOptimization MathematicsOptimization UtilizationOptimization Example In the development of the ultimate pit limits for a narrow ore body, parameters necessary in the design of a functional, or working, pit become highly sensitive factors in the determination of ore reserve levels and their associated waste to ore stripping ratios. Through the use of Get price

Mine call factor issues from a surface mine perspective

[4] M Springett: Solving open pit grade control problems. Innovative Mine Design for the 21st Century, Bawden Archibald (eds), USA, pp. 225-226, 1993. [5] EJ De Jager: The Analysis of the Mine Call Factor In the Gold Mining, with specific reference to Western Holdings Mine. Thesis: PhD (Eng), University of the Witwatersrand, Johannesburg, 1997. Get price

Performance Measurement of Mining Equipments by Utilizing

• The physical environment under which mining equipment operates is less than ideal. • The operating environment of the mine is dynamic with many unknowns that can affect the equipment utilization drastically. In this study, OEE of shovels and trucks have been considered since they are the main equipments for the most of the Open Pit Mines. Get price

ACG ONSITE GEOTECHNICAL TRAINING FOR OPEN PIT MINES

geotechnical aspects of the mining industry, and has worked on open pit and underground metalliferous mining problems. In 1985 he was awarded the Manuel Rocha Medal by the International Society of Rock Mechanics for his work in open pit mining and use of ground support to improve pit stability. Get price

Selection criteria for loading and hauling equipment

Methods for estimating productivity and costs, and dependent equipment selection process, have needed to be increasingly reliable. Estimated productivity and costs must be as accurate as possible in reflecting actual productivity and costs experienced by mining operations to accommodate the long-term trend for diminishing commodity prices, For loading and hauling equipment operating in open Get price

Open Pit Optimisation and Design: A Stepwise Approach*

imported into Whittle for the open pit optimisation, based on geotechnical and economic parameters derived from calculations or assembled from mines operating in Ghana. The optimal pit is then imported back to Surpac for detailed pit design incorporating a ramp and berms. The designed pit contains 5.03 Mt of ore at an average grade of 1.7063 g/t. Get price

Surface mining planning and design of open pit mining

Jan 09, 2016Basic Concept 1.2) Open pit Mining method 1.3) Bench 1.4) Open Pit Bench Terminology 1.5) Bench height 1.6) Cutoff grade 1.7) Open Pit Stability: i) Pit slope ii) Pit wall stability iii) Rock strength iv) Pit Depth v) Pit diameter vi) Water Damage vii) Strip Ratio (SR) 1.8) Open-pit mining sequence 1.9) Various open-pit and orebody Get price

Mine call factor issues from a surface mine perspective

[4] M Springett: Solving open pit grade control problems. Innovative Mine Design for the 21st Century, Bawden Archibald (eds), USA, pp. 225-226, 1993. [5] EJ De Jager: The Analysis of the Mine Call Factor In the Gold Mining, with specific reference to Western Holdings Mine. Thesis: PhD (Eng), University of the Witwatersrand, Johannesburg, 1997. Get price

Hydrogeological Aspects of the Open

The mining area of the open-pit coal mine 11 the Czechoslovak Army11 in s part of the North Bohemian Brown Coal Basin, which was formed by filling of the trough oriented in the SW-NE direction. The basin in bordered by the morphologically significant slope of gneiss and granite massif of the Kru~ne hory Mts. in the North-West. These rocks form Get price

A New Mining Scheme for Hanging

A new mining scheme by employing the induced caving mining method to exploit hanging-wall ore-body during the transition from open pit to underground mining is proposed. The basic idea is to use the mined-out area generated by the planned mining of the hanging-wall ore-body to absorb the collapsed slope body, so as to avoid the influence of the inner-slope mining to the normal open-pit mining Get price

Haul Road Design Guidelines

lifeline of the open cut mine. Road design must accommodate a number of factors and expected weather conditions, the largest vehicle on site and the speed of operations are taken into account in the design process. Superelevation is a particularly important design consideration for switchbacks on pit ramps at Mine XYZ. On such corners Get price

Design of Surface Mine Haulage Roads

Design of Surface Mine Haulage Roads – A Manual By Walter W. Kaufman and James C. Ault ABSTRACT This Bureau of Mines manual for design of surface mine haulage roads covers such aspects of haulage road design as road alignment (both vertical and horizontal), construction materials, cross slope, and drainage provisions. Get price

Applications of Noise Control in the Mining Industry

Jan 08, 2015This can be implemented at a number of different stages throughout the mining lifecycle. Noise should be a consideration early on and throughout the mining process, which means that it is imperative to ensure effective, considerate operational and administrative practices in the design and execution of a mining operation (Sensogut, 2007). Get price