1.1 opencast mining 1.2 stripping ratio 1.3 breakeven stripping ratio 1.4 quarriable limit as per stripping ratio ... Break even stripping ratio = (mining cost per tonne of minerals by u/g method or open cast mining cost + reclamation cost per ton of minerals) / (cost per cubic meter of over burden by the ...
ADVERTISEMENTS: List of equipment used in opencast coal mining are: 1. Bulldozer 2. Craper 3. Ripper 4. Tractor Shovel 5. Dipper Shovel 6. Stripper Shovel 7. Pull Shovel or Hoe 8. Dumpers or Tippers 9. Drag Line 10. Road Grader 11. Rock Drills. Opencast mining is the oldest method of excavating minerals but the mining […]
open cast mining technology can play a vital role to full fill the demand of estimated coal production. As the open cast mining methods is a very financially cost effective mining methods which allows the high grade of mechanization and more, enormous creation volumes. In India, the opencast mining methods accounts for about 95 per cent of coal ...
•Mining Cost (Ore) - $2.50 per tonne •Mining Cost (Waste)- $2.40 per tonne •Mining Cut-Off Grade (g/t) : 1 –12 month period : 1.25 gram per ton ... ore tonnage, stripping ratios or mined grade. • Multiple pushbacks can be generated, thereby catering for highly selective mining in terms of set targets.
Vanggatfontein is an open cast coal mining operation that mines the No.5, No.4 and No.2 Coal Seams using truck and shovel rollover mining methods at an average rate of 340,000tpm run of mine (ROM). Vanggatfontein is currently operated as an opencast mining operation based on contractor truck and shovel strip mining and roll over methodology.
Stripping Ratios, Pit Limits & Cutoff Grade Optimization. F. Barcelonistas. ... cut-off grade policy for open pit mining operations through net present value algorithm considering metal price and cost escalation. ... Managing Mining Equipment and Geological Risk at a Given Mine Setup.
Table 1 is the calculation of the mining cutoff grade for a copper project with the following parameters: 30 kt/d (33000 st pd) of ore mined for 20years $300,000,000 capital cost (include replacement capital) $1.00 mining cost per ton of ore $0.95 mining cost per ton of waste $3.00 processing cost per ton of ore $1.00 general and administrative ...
Interpretation 20 4 COMPARISON Comparison with IFRIC 20 AASB Interpretation 20 Stripping Costs in the Production Phase of a Surface Mine incorporates Interpretation IFRIC 20 Stripping Costs in the Production Phase of a Surface Mine issued by the International Accounting Standards Board (IASB). Australian-specific paragraphs (which are not included in IFRIC 20) …
Open-cast mining is an estimated 30% cheaper than deep mining, thus providing an economic incentive for those concerned mostly with costs. In 1984, it cost £27.55 to produce a tonne of open-cast coal in the UK, and in 1990, the cost increased only to £27.60.
The open pit mining method (also known as opencast, open-cut, or strip mining) is not extractive; meaning that most of the time there no need to tunnel directly into the earth. Rather, it is a technique used when rocks and/or ore are discovered near the surface.
Opencast mining is also known as open-put mining, open-cut mining, surface mining and also as strip mining, the later term being commonly used in the U.S.A. for opencast mining of coal. The overburden and the mineral, coal, are excavated in long strips of a few metres thickness and hence the operations are termed strip mining.
Total capital costs of the expansion project are estimated at $300 million, including $130 million for capital equipment and the balance in pre‐production stripping over the period of 2009 through 2013. Approximately $50 million of mobile mining equipment will be ordered in 2007 to permit waste stripping to commence in 2009.
planned to work at 1:12 to 15 Stripping Ratio with the use of Large and Medium size equipments. As the production from the opencast mine is going up at higher stripping ratio, the problems of over burden dumps and accommodation thereof have posed another challenge, that need attention. Mining Scenario
Surface Coal Mining Methods in Australia 5 2. Open cut mining methods strip mining Large-scale open cut coal mining operations commenced in Australia in mid 1960s and since then there has been significan t developments in this method of mining. The mines are now operating at significantly higher annual tonnages, growing deeper, more complex and
Opening a new mine or expanding an existing operation can be a challenging and daunting task. Aside from assessing and evaluating social-environmental concerns and designing the mining and material movement approach, the first question often asked is, "how much will it cost us to mine?" This may need to be determined even before you decide that there is a potential project.
3) Break even Stripping ratio/cost economic analysis 4) Production targets 5) Degree of mechanization 6) Environmental conditions & the township, land reclamation, etc 7) Availability of water, power, skilled labour, transport facilities, Steps in Opencast mining 1) Determination of mine boundaries: Exclusion of: high SR area (deep
Economic rationality is currently open pit stripping ratio is well calculated by comparing the cost of industrial exploitation, the calculation does not take into account the safety of mining work well accidents, such as surface subsidence caused by enormous economic losses, but also did not consider the open-pit mining on the ecology of environmental damage …
Costs of Strip Mine Reclamation in the West Kenneth L. Leathers' INTRODUCTION Surface-mined coal accounts for about 60 percent of the Nation's annual coal sup- ply. At current levels of coal production, at least 55,000 acres of land are dis- turbed annually by such mining. Increasing demand for energy resources, coupled with
•OBR Cost – it is the cost of removing overburden (overlying material)for extraction of coal •Standard stripping ratio - the ratio of "overbudern (OB)to be removed" to "the mineral to be produced" during the whole project life. Suppose in an opencast mine, 20 lakh CuM OB will be removed during the life
This paper attempts to highlight some of the problems encountered in the economic exploitation of the deeper coal seams by opencast mining methods. The major cost elements of three methods of overburden removal are examined in relation to the overall cost of winning coal from deeper-lying coal seams. The three overburden removal methods examined are dragline stripping …
IFRIC DI/2010/1 Stripping Costs in the Production Phase of a Surface Mine published. Comment deadline 30 November 2010. 10 August 2011. Near Final Draft of IFRIC 20 published. 19 October 2011. IFRIC 20 Stripping Costs in the Production Phase of a Surface Mine issued. Effective for annual periods beginning on or after 1 January 2013.
Open Cast Mining/Strip Mining Introduction As the name speaks, it is a surface mining system in which deposit is opened to the atmosphere and after removing the orebody, the over burden which was blanketing it, is cast back in the worked out area. This is also known as Strip Mining.
In October 2011 the International Accounting Standards Board issued IFRIC 20 Stripping Costs in the Production Phase of a Surface Mine.It was developed by the Interpretations Committee. Other Standards have made minor consequential amendments to IFRIC 20, including Amendments to References to the Conceptual Framework in IFRS Standards (issued March …
Mining and opencast mining in particular affect all components of ecosystems (Bradshaw, 1997).During opencast mining, material overlying the mined minerals, called overburden, is excavated and deposited in a heap. This heap can be located either inside the mine pit (an internal heap) or outside (an external heap).
Equations. The equations for stripping ratio are, for coal: ()for metal: ()where volume is typically expressed as m 3 or yd and weight is typically expressed as tonne or ton.. Use. It is common for the stripping ratio to be used as an indicator of economic value for an open pit mine. This is because removal of waste is a cost to the mine whereas mining ore leads to revenue.
for a Typical Opencast Mine in the Withank Area" is my own work, except to the extent indicated in the acknowledgement and references. ... OVERBURDEN STRIPPING 55 5.1 Introduction 55 5.2 Draglines 57 ... 3.6 Comparison of Capital and Operating Costs of Various Topsoil Mining Methods for Different Production Rates.
Open-pit mining, also known as opencast mining, open-cut mining, and strip mining, means a process of digging out rock or minerals from the earth by their elimination from an open pit or borrow. Great mining is mainly considered by mining companies product equipments like as Aluminum, copper, gold, mercury, etc.
Open Pit Mining. Open-pit mining, also known as opencast mining, open-cut mining, and strip mining, means a process of digging out rock or minerals from the earth by their elimination from an open pit or borrow. The word is used to distinguish this type of mining from extractive methods that need tunneling into the earth.
opencast strip-mining operation that extracts. ... Locally, the overall mining cost inflation indices shows a yearly. increase of 2% over the national consumer inflation. In …
Strip/opencast mining 5 1.3.2. Terrace mining 7 1.3.3. Open pit mining 8 1.4. Underground coal mining 9 1.4.1. Room and pillar 9 1.4.2. Longwall 12 1.5. ... Figure 1.3: Typical operating cost breakdown for strip coal mining in South Africa ..... 7 Figure 1.4: Combined terrace (pre-stripping of soft overburden) and strip mining (stripping deeper ...
The maximum allowable Stripping Ratio (SR max) defines break even stripping ratio (BESR).This represents the highest possible units of waste that can be handled. If the SR exceeds the BESR then the operation will be uneconomical as the income generated by the ore is insufficient to offset the costs incurred in mining.
The Pros of Strip Mining. 1. High Recovery Rate. Other forms of mining do not guarantee the same rate of return as strip mining does. Materials are recovered at a rate of up to 90 percent during strip mining, which is a much higher recovery rate than most forms of mining can promise. Tunnel mining, for instance, only offers users a potential ...
number of opencast mines, whether large or small, are now days reaching to deeper mining depths. As a result analysis of stability of operating slopes and ultimate pit slope design are becoming a major concern. Slope failures cause loss of production, extra stripping cost for
The real issue is capitalisation of stripping costs in the production phase of the mine. The IFRIC also noted that stripping activity in the production phase occurs because development might continue through removal of overburden in portions of the mine, to reach ore that would be extracted in the current or in later periods.
Mining Cost Service is the industry standard reference for Mining Cost Estimation. This system places cost estimating data at your fingertips with conveniently indexed information to make your cost estimates faster, easier, and more credible. Monthly updates assure that you are working with the most current cost data available.
Relatively thin overburden (0-50 m maximu m otherwise stripping ration and cost of stripping becomes t oo high ). Regular and cons tant surfac e topography and coal layers (not mor e …