Stripping Ratios: What are They and Why are They
A strip ratio, or stripping ratio, is an important measurement related to the open-pit mining process. Put simply, it represents the amount of waste material, also known as overburden, that...In this formula, Vp is the total amount of stripping in the pit limit; and AP is the total amount of ore in the pit limit. The average stripping ratio indicates the total economic effect of open pit mines, and it can be used to judge whether the opening pit limit is good or not in design.Stripping Ratio in Open-Pit Mining, Types of SpringerLink
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Ultimate pit optimization with environmental problem for open-pit coal mine
The objective of this paper is to quantify the ecological costs of open pit coal mining and to incorporate such costs in an ultimate pit optimization algorithm to demonstrate the influence of ecological costs on the optimum ultimate pit of open pit mine. 2. Methods.In coal mining: Contour strip mining. If the break-even stripping ratio remains favourable, further cuts into the hillside will be made. Otherwise, if there are sufficient reserves under the knob of the hill, the coal may be recovered by underground mining or by augering.Break-even stripping ratio Britannica
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A new method to confirm the economic and reasonable stripping ratio
Economic rationality is currently open pit stripping ratio is well calculated by comparing the cost of industrial exploitation, the calculation does not take in A new method to confirm the economic and reasonable stripping ratio of surface coal mine IEEE Conference Publication With increasing overburden to coal ratio, the cost of removal of overburden (known as stripping cost) adds considerably to the cost of mining the coal beyond economic limit. To develop a mine, the break even stripping ratio (at the Coal Ratio an overview ScienceDirect Topics
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Surface Mining Methods and Systems SpringerLink
Stripping Ratio. Environmental constraints. Strip Mining is normally chosen where the overburden thickness is such that excavation can be carried out by a single stripping machine such as a dragline. 8.6.2 Stripping Ratio. Overburden Ration = d/t. This is a depth ratio often used by geologists. Mining engineers use a volumetric ratio.and handling method (the current stripping ratio is the limit). Let line bс be drawn in parallel to the coal bed with the assumption that overburden above this line is not to be removed. Then, in the course of deeper mining, overburden volumes will remain constant, i.e. the overburden volume in V period will match with the limit stripping ratio.MINERAL MINING TECHNOLOGY Effect of Highwall
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Stripping Ratios, Pit Limits & Cutoff Grade
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 Highwall mining is an adaptation of auger mining. Instead of an auger hole, an entry into the coal seam is made by a continuous miner, remotely operated from a cabin at the surface. The cut coal is transported by Coal mining Underground, Surface, & Drilling
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(PDF) Open Pit Mining ResearchGate
Abstract and Figures. Open pit mining method is one of the surface mining methods that has a traditional cone-shaped excavation and is usually employed to exploit a near-surface, nonselective andThe Chenbaerhuqi coal field in Hulunbuir City, Inner Mongolia Autonomous Region of China, is where the Baorixile open-pit coal mine is situated (as shown in Fig. 2) 7,28.The mine's externalResearch on production capacity planning method of open-pit coal mine
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Is the strip ratio still an important factor in open pit mines?
Joe was taking us through some important aspects of Minemax Tempo the integrated mine planning solution with collaboration and optimisation capabilities for mid-to-large-size mining operations.Note: (1) Stripping ratio is defined as the ratio of OBR to Coal produced in Open Cast mining. (2) Meghalaya OBR figures are not known and not reported. (3 ) While calculating stripping ratio, if OBR is not reported, corresponding production was excluded to find public/private sector OBRCompany Wise Over Burden Removal(OBR) and
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Stability Analysis of Overburden Dump Slope—A Case Study
Abstract. Open cast mining produces huge amount of overburden dump material and it is stored in the form of external overburden dump in pit dumping. Present investigation deals with stability analysis of overburden dump slope at Marki Mangli-I open cast coal mine. The stripping ratio of the Marki Mangli-I coal mine is 6.75 which is very Coal Production from opencast mines in India (FY 1998-99 to 2016-17) Source: Coal Directory of India, FY 1998-99 to 2016-17 Output Per Man Shift (OMS) of UG and OC mining methods under CIL.(PDF) Underground and Opencast Coal Mining Methods in
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Mineral Resource Extraction SpringerLink
Thus, an increase in the stripping ratio can render the deeper ore uneconomic to mine by surface mining but economic to mine to underground methods. The stripping ratio for metal mines is usually between 1:1 and 3:1 but can exceed 10:1 in mines with high-grade ore. Stripping ratios greater than 20:1 occur in some coal mines (Stevens Mode of excavation. If the mode of excavation is manual the maximum stripping ratio is 1.5 to 2:1 in the case of semi-mechanization methods like shovel-dumper combination the stripping ratio that can be adopted is 4 to 5:1. In the case of dragline or big bucket wheel excavation the stripping ratio up to 10:1 is also visible.Break even Stripping Ratio My Mining Notes
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Calculating Stripping Ratios for Area Strip Mines
Calculating Stripping Ratios for Area Strip Mines Mnge 315 ©Dr. B. C. Paul spring 2003 revised 2010 Note These notes contain information considered common knowledge to those familiar with Strip Mining. Books such as “Elements of Practical Coal Mining” and SME’s “Surface Mining” were specifically referenced fStripping Ratio as aIt focused on the different stripping techniques used in South African mines and evaluated their efficiencies in terms of capital invested, labour productivity, production outputs, operational expenditures and other productivity measures. These results were used to benchmark each individual South African surface coal mine withTask 3.14.1 Evaluation of stripping techniques Coaltech
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Coal Ratio an overview ScienceDirect Topics
The mining operators consider a maximum cutoff for the stripping ratio and also calculate the overall stripping ratio to keep the mine operation economically feasible. While mandatory health and safety regulations are less stringent in a surface coal mine compared to an underground coal mine, environmental considerations and social resistancesThe two basic mining methods are surface (Opencast) and deep underground mining. The choice of mining method depends primarily on depth, density, overburden (OB), and thickness of the coal seam; seams relatively close to the surface, at depths less than approximately 55 m (180 ft), are usually surface mined. Coal seams at depths of 55 to 90 Coal Mining Cost Model Chandra Wadhwa & Co.
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Coal mining method with near-zero impact on the ecological
In order to avoid the destruction of underground aquifers in the eco-environment frangible area caused by the exploitation of coal resources, a new coal mining method with near-zero impact on aquifers (MNIA) was proposed according to the advantages of strip mining and backfill mining methods to effectively control overburden, The results of mining and geometric analysis showed that to ensure the production of 1500 thou t of coal with an average stripping ratio of 8 m 3 /t annually, it will be necessary to remove 12000 thou m 3 of overburden, including direct dumping—up to 3 thou m 3, truck-and-shovel—up to 7 thou m 3 and hydraulic method—up to 3 thou m 3Selection Procedure of Draglines for Stripping Operations in Surface Mining
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Standardized emissions inventory methodology for open
Currently the open pit coal mining activities underway in northern Colombia are regarded as the world’s largest Ghose (2004, 2007) based on their own emission factors estimated that a typical open pit coal mine in India with a stripping ratio of 3.98 emitted 9366.7 kg/day of TSP while its production was 2500t/day ie. 3.74 Kg of TSP perMining then ceases. The ratio of the amount of waste rock stripped to ore removed is called the overall stripping ratio. The break-even stripping ratio is a function of ore value and the costs involved. Ore reserves. The first step in the evaluation and design of an open-pit mine is the determination of reserves.Mining Strip, Open-Pit, Quarrying Britannica
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Whats the average stripping ratio of open pit mines
The stripping ratio in a mine is chosen based on economics. A high grade orebody can support a high stripping ratio. A low grade ore body cannot support a high stripping ratio. Thus you may have aStripping Ratio. Environmental constraints. Strip Mining is normally chosen where the overburden thickness is such that excavation can be carried out by a single stripping machine such as a dragline. 8.6.2 Stripping Ratio. Overburden Ration = d/t. This is a depth ratio often used by geologists. Mining engineers use a volumetric ratio.Surface Mining Methods and Systems SpringerLink
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