Other articles where Stripping ratio is discussed: coal mining: Choosing a mining method: …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 producing and…
Jun 20, 2019· The strip ratio is calculated by dividing the thickness of the overburden by ore thickness. Eg. if the overburden is 100m thick and the ore is 50m, the strip ratio is 2:1. The lower a strip ratio, the more profitable the mine will be, since less material needs to be moved.
As Table 1 shows, the overall stripping ratio is 2.75:1; a total of 315.7 Mt of heap and dump leach ore and 868.3 Mt of waste will be mined. The current stripping ratio is 2:1 and the final overall stripping ratio will be 6:1 assuming the open pit is mined to its planned limits.
For diamond I strip mine at level 11, 2-high tunnels, 3 blocks in between. (Since they spawn in veins I accept the risk of missing a few if they happen to spawn in the center of the 3 skipped spaces only) this let's you cover much more ground without noticable losses. …
Jan 16, 2021· In our ignorance, impatience, and arrogance, step by step we are turning the farm into a strip mine. In Part One of this series, Wittgenstein's Money, I explored the consequences of failing to appreciate the role of time, ignorance, and uncertainty in understanding the function of money, and how its function can change.
The Mine employs satellite tracking of haul trucks to ensure proper routing of material. The life-of-mine strip ratio is 1.3:1 (waste:ore) and it is anticipated mining will reach the maximum rate of 83,000 tons per day in 2001 with the final expansion of the mining fleet.
Stripping: is the removal of overburden. Stripping Ratio: is the ratio of a unit of waste material removed per similar unit of ore material removed. Toe: is the base of a bank bench or a slope.
What is STRIPPING RATIO? What does STRIPPING RATIO mean? STRIPPING RATIO meaning- STRIPPING RATIO definition - STRIPP...
In general, as the stripping ratio increases, the amount of mine energy per ton of cathode cop-per also increases. Similarly, as the pit depth be-low the surface rim increases, the vertical and horizontal distances that the waste rock and ore must be hauled also increases. This increase is reflected in greater energy use, primarily for hauling.
The strip ratio is controlled by the height of the triangle portion of overburden removed. Controlling the ratio allows the unit cost of production to be largely controlled. The disadvantages of contour mining include the difficulty of maintaining the stability of steep, reclaimed hillsides and the limited width for effective operations on the ...
Mining Ratio: The mining ratio is outside the operator's control for a mountaintop removal project; that is, a fixed volume of earth overlies a fixed volume of coal. There is nothing a mine designer can do to improve the ratio if the full seam is to be taken. However, any reduction of marketable coal will increase the mining ratio.
Jun 06, 2010· a. SR measures the amount of waste that needs to be removed to get an amount of ore, just as we mine it. Note the "amount"! b. This will differ depending on time span under consideration. * Initial studies (feasibility) – overall stripping ratio. * Current month – incremental stripping ratio.
Sep 08, 2013· The PFS on Project F demonstrates outstanding economics; a shortened time frame to first production, over 1 million tonnes per annum of primarily coking coal product, and a low 5:1 strip ratio open pit with an initial 11 year mine life.
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Apr 30, 2016· The strip ratio (SR) is the simplest measure of mining efficiency. Defined as the weight of overburden (or waste ore) divided by the weight of oil sands ore, a strip ratio of 2 is considered high but feasible if the ore grade is high enough. A better measure of mining economics is the TV:BIP ratio.
Apr 10, 2021· Stripping costs are those costs incurred when removing overburden or waste materials in order to obtain access to a commercially-producible ore body. If so, and the activity provides better access to the deposit, then under GAAP the cost should be capitalized along with other development costs. If not, then the stripping cost should be charged ...
A strip ratio, or stripping ratio, is an important measurement related to the open-pit mining process. It represents the amount of waste material, also known as overburden, that must be moved in ...
Jul 20, 2016· Stripping ratio- The unit amount of overburden that must be removed to gain access to a similar unit amount of coal or mineral material. Stockpile-Broken ore accumulated in a heap on surface, pending treatment or shipment. Sump-The bottom of a shaft, or any other place in a mine, that is used as a collecting point for drainage water.
The ratio of ore to waste can range from uneconomic low grade to profitable high grade. Removal of material with a low ratio of ore to waste may produce some ... production phase of the mine ('production stripping costs'). Issues 7 This Interpretation addresses the following issues: (a) recognition of production stripping costs as an asset;
The stripping ratio method of calculating the profitability of the mining procedure is commonly used in the ore or coal mining process. In relation to its application in the mining of ore, the utility of the stripping ratio is the determination of the approximate ratio of waste material that must be moved in order to reach a certain ratio of ore.
Return-on-equity (ROE) is a key financial indicator considered by investors because it indicates the level of profit a company can generate from equity and return to stockholders. Average ROEs in ...
Mar 20, 2016· Pulp Densities. Pulp densities indicate by means of a tabulation the percentages of solids (or liquid-to-solid ratio) in a sample of pulp. This figure is valuable in two ways—directly, because for each unit process and operation in milling the optimum pulp density must be established and maintained, and indirectly, because certain important tonnage calculations are based on pulp density.
Aug 29, 2016· The stripping ratio 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.
Jul 19, 2017· Determining the stripping ratio and the stable pit slope angle are the main challenging task in the design and optimization process. Also the location of ramps, haul roads, and type of equipment, fleet capacity, and dewatering are important in mine planning. The initial capital expenditure is usually high, however, the production rate is ...
volatility compared to the strip-ratio method, which aims to achieve a higher level of consistency in allocating stripping costs to reserves over the life of the mine. Under the proposals, any existing stripping cost balances need to be reclassified as a component of the mine asset to which the stripping …
Stripping of the overburden will then proceed if the minerals are to be mined at the surface. Economic considerations determine the stripping ratio, the ratio of waste removed to ore recovered; it may range from as high as 45 yd./ton (38 m./tonne) for coal mines to …
a. SR measures the amount of waste that needs to be removed to get an amount of ore, just as we mine it. Note the "amount"! b. This will differ depending on time span under consideration. * Initial studies (feasibility) – overall stripping ratio. * Current month – incremental stripping ratio.
A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.