Posted on September 21, 2018
1 4 Stripping Ratio | Ratio | Surface Mining - ScribdIn case of simultaneous back filling thickness ratio helps in knowing whether the backfilled surface will be lower than, equal to or above the pre-mined land surface level. Break even stripping ratio (BESR) In case of coal deposits,. In case of other deposits,. BESR helps in determining the pit limit. Example: Selling cost of coal.coal mining stripping ratio,Estimating Average Total Cost of Open Pit Coal Mines in . - InfoMinesuch as coal quality, stripping ratio, as well as other possible explanatory variables is less important. Estimation of the daily run-of-mine is based on operating time periods of the process plants, mining operations, crushing plants and maintenance services. There is a general agreement that the size of the deposit has a.
In mining, stripping ratio or strip ratio refers to the ratio of the volume of overburden (or waste material) required to be handled in order to extract some tonnage of ore. For example, a 3:1 stripping ratio means that mining one tonne of ore will require mining three tonnes of waste rock. Stripping ratios are typically reduced to.
Other articles where Stripping ratio is discussed: …calculated with the aid of stripping ratios, which represent the amount of waste material that must be removed to extract a given amount of coal. Stripping ratios can also consider the selling price of coal, and a certain minimum profit can be added to the total cost of.
1 INTRODUCTION TO SURFACE STRIP COAL. MINING. 1.1 FUNDAMENTAL CONCEPTS AND DEFINITIONS. 2. 1.2 SURFACE COAL MINING. 5. 1.3 PRODUCTION COST AND STRIPPING RATIO. ANALYSIS. 8. 1.3.1. Stripping Ratio for Multiple Seams. 11. 1.4 BASIC PROFIT FUNCTION ANALYSIS. 13. 2 GEOLOGY.
ABSTRACT: The economic stripping ratio used to define an economic mining block in an open pit coal mining situation is rationalised by considering the time value of money, and defining run of mine recovery and mining cost as dynamic variables dictated by the thicknesses, depths and number of seams within a mining.
such as coal quality, stripping ratio, as well as other possible explanatory variables is less important. Estimation of the daily run-of-mine is based on operating time periods of the process plants, mining operations, crushing plants and maintenance services. There is a general agreement that the size of the deposit has a.
In strip coal mining operations, the following are sometimes seen: Overbuden Thickness (ft) Overburden (yd 3 ) SR = SR = Coal Thickness (ft) Coal (tons) Stripping Ratios Instantaneous stripping ratio: The stripping ratio for a given push back Overall stripping ratio: The stripping ratio for the total amount of material removed.
Nov 15, 2011 . Thus by mining from a low saleable strip ratio to a higher strip ratio will generally result in the highest profit margins early in the life of the mine, resulting in higher NPV values. By considering the thicknesses of the soft and hard overburden, as well as coal thicknesses, it can be seen how these contribute.
Nov 22, 2016 . Extreme World & Engineering Documentary - The Largest Open Pit Mine in The World Bingham Canyon - Duration: 15:48. Extreme World & Engineering Documentary HD Channel (Official) 18,192 views · 15:48. Open Pit Coal Mine - Duration: 4:15. Jim How 388,432 views · 4:15 · Surface Mining Animation.
Stripping Ratio as a Fundamental Ability to surface mine depends on the value of the ore being high enough to offset the cost of Overburden Removal Stripping Ratio determines relative amounts of each to be moved If coal generates a $5/ton earning and overburden costs 45 cents per cubic yard to move – what is the.
Feb 2, 2016 . vi) Water Damage vii) Strip Ratio (SR). 1.8) Open-pit mining sequence. 1.9) Various open-pit and orebody configurations. We will explore all of the above in Topic 6. Prof. . ❑Large bucket-wheel excavators of the kind used in European coal mines have not been applied to metal mining, because this.
Oct 19, 2011 . In IFRIC 20 Stripping Costs in the Production Phase of a Surface Mine, the IFRS Interpretations . average life-of-mine stripping ratio approach, while others expense such costs as incurred, or follow the .. activities used to extract resources that may not be embedded in an ore deposit, for example coal.
Apr 8, 2017 . EDIT 1 :- For the coal deposits lying at the lesser depth, the surface mining methods of extraction of coal is generally used. While mining the coal by surface mining method ,stripping ratio (tons of recoverable mineral/ore reserve produced per cubic meter of overburden ) and break-even stripping ratio (the.
In large nearly horizontal open-pit coal mines using shovel-truck technology, the double loop transportation corridor on the complete end wall is relatively fixed and ... where Q is the annual stripping quantity above the slope cover height; v the average advancing speed of the open pit; VG the increment in ditch space; μ the.
Mar 13, 2011 . The fraction of waste rock to ore excavated is defined as the stripping ratio. Stripping ratios of 2:1 up to 4:1 are not uncommon in large mining operations. .. Conveyors systems are also integrated into bucket wheel shovels in many surface coal operations, which eliminates the need for haulage trucks.
Jul 19, 2016 . Emissions associated with coal mining activities are much more significant in. Australia and Indonesia compared to the PRB. Both countries have considerably higher strip ratios. (ratio of overburden to coal) compared to the PRB, meaning that more overburden must be removed for each unit of coal.
Tekirdag-Saray lignite basin generally comprises a high stripping ratio due to natural topography. It is a common known fact that one of the most important factors affecting ore production unit cost is the stripping ratio in open pit mines. Within the coal basin, there are totally 15 coal panels in the sectors of Safaalan, Edirkoy.
This process continues along parallel strips of land so long as the ratio between the overburden and the coal seam, called the stripping ratio, makes it economically feasible to recover coal. Mining may cease in a particular area, for example, where the coal seam becomes thinner or where the seam dips further below the.
May 1, 2016 . SURFACE MINING ≠ STRIP MINING: Although sometimes mistakenly referred to as strip mining, oil sands is actually mined from an open-pit below several meters of overburden. Strip mining is the mining of a relatively flat deposit very close to the surface, commonly used in coal or phosphate industries.
Several coal beds are mined by strip mining using a back-hoe hydraulic excavator/truck system at the Recreio Coal Mine, one of the mining operations of Copelmi Mineração Ltd. The mine's annual production is 1 800 000 tonnes at a stripping ratio of 7:1 (m3/t). The total material (coal + waste) excavated per annum.
May 13, 2013 . Cost of transportation. - Overhead and sale of ore/coal. Before going for any surface mining operation an economic comparison is necessary between the underground mining cost per ton of ore production and surface mining and reclamation cost per ore production and a stripping ratio is to be calculated.
Oct 16, 2015 . Cloud Peak Energy moved a dragline from its Cordero Rojo coal mine to its Antelope mine to address the issue of needing to move more dirt to get at the coal seams. Cloud Peak . The Antelope Mine, where Cloud Peak is moving its dragline, has the highest ratio of dirt to coal in the basin. “This dragline.
Open Pit Mining. 3 -2.1. Description. 3 -2.2. Mining Costs. 3 -2.3. Environmental Issues. 3.3. Underground Mining. 3 -3.1. Description. 3 -3.2. Room and PiUar. 3 -3 -3. .. mining operation may result in an increased stripping ratio and haulage distance, with a .. The first survey was oriented towards coal mining; the second.
Jun 14, 2012 . Mining strip ratio 9:1. – CHPP yield 74%. – Key equipment includes 3 excavator fleets. – Capacity to produce up to 1.5 Mtpa of Hard Coking. Coal from existing Trend Mine and progressing. Roman feasibility study to increase production to. 4 Mtpa by 2016. Source: Reserve number on ROM basis.