0086-21-58386256
Dec 16, 2016· The declining trend in strip ratios for Indonesia's coal mines have allowed producers to survive in periods of lower coal prices through reduction in production costs and margins. However, producers are likely to have sterilised coal and jeopardised future coal reserves with continuous mining in lower strip areas.
Read More
In its Q1 2019 report, the company said that, generally speaking, "higher strip ratio" at its mines drove up cost per ton for the period. Western Fuels Association reported in its annual report that by 2023, the strip ratio at its flagship Dry Fork mine "will have increased by over 40%."
Read More
* Thus in coal SR is the number of BCM of waste that needs to be removed to uncover 1 t of coal * Some applies in other bedded deposits. b. Ore miners measure both waste and ore in tons or tonnes. ... Switch to underground mining if your stripping ratio is more …
Read More
ratios, equipmcnt capabilities, sequencing and selective mining practices .. This paper is concerned primarily with multiple-seam mining of bituminous collI, but it should be realized that the principles can apply to any other mineral that can be mined by multiple-seam surface mining methods. TIle nomenclature used refers to coal mining.
Read More
Oct 31, 2018· 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 …
Read More
stripping ratios. This approach was controversial as many commentators believed that it did not reflect their view of the economics of the decision to mine, and created inappropriate volatility in the income statements of many mining companies. In 2006 the Canadian accounting standard setter issued specific guidance allowing stripping
Read More
6. Stripping ratio . The main factor in designing a n open pit mine, which largely determines the cost of mining, is the stripping ratio.. Stripping is the removal of waste rock from above and around the orebody. Stripping ratio is defined as the tonnage of waste rock to be mined, divided by the tonnage of ore to be mined from the pit.
Read More
effect of stripping ratio in coal mining. break even stripping ratio example for coal mining html, break even stripping ratio example for coal mining 28 Oct 2014 Stripping ratio is a term that is derived from the mining industry and of the mining procedure is commonly used in the ore or coal mining process For example, if the mining company must extract one part of ore to three and a half ...
Read More
Isaac Plains strip ratio increasing . THE strip ratio at Stanmore Coal's Isaac Plains mine in Queensland is up compared to FY19 as the depth of the pit increases with the progression of mining and overburden stocks are increased. Isaac Plains delivered 3.0 million tonnes of run-of-mine coal. ...
Read More
Stripping ratioThe ratio of tonnes removed as waste relative to the number of tonnes of ore removed from an open-pit mine. Strip mineAn open-pit mine usually a coal mine operated by removing overburden excavating the coal seam then returning the overburden. Sub-bituminousA black coal intermediate between lignite and bituminous.get price
Read More
May 09, 2020· 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.
Read More
K.P. Galvin, S.M. Iveson, in The Coal Handbook: Towards Cleaner Production: Coal Production, 2013. DMC measurement and control. Changes to plant feed and operating conditions such as pressures, flowrates, medium density and medium-to-coal ratio, all impact the performance of DMCs.As these units process such a large fraction of the plant throughput, it is important to monitor, control and ...
Read More
of OP mining is the Stripping Ratio (SR), by which is on the whole meant the volume of removed waste per unit of mineral (m3 per m3, or m3 per ton). ... In relation to the practice of surface mining of coal deposits, it is common to describe the
Read More
Mining Industry Overview 5 9/19/2007 Industry Overview The industry program includes issues and trends in coal, metal and non-metal segments of the U.S. mining industry. These mining operations include prospecting, exploration, development, production, mineral processing, environmental restoration and reclamation,
Read More
The units for stripping ratios can vary and usually depends on the geological properties of the deposit and the commodity mined. It can be expressed in tonnes (t), or cubic meters (m 3).Usually for coal, cubic meters (m 3) or tonnes (t) are used.However, for hard rock mines where the geology is usually complex with the presence of various rock types, tonnage (t) is usually preferred.
Read More
Surface mining methods835 Кб. Typical examples of this type of mining are the larger tonnage coal mining operations inmine using an in-pit crusher and conveyor and waste is tipped directly as envisaged in a terrace mining operation).processing plant on surface, at a rate of 1,22mt per month (ore) at a stripping ratio of 3:1.
Read More
Stripping ratio mining Britannica. 19-08-2020 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.
Read More
Aug 31, 2012· Average stripping ratio – operations 9.60 7.40 10.20 7.24 … Pacific Coal Resources Ltd. is a Canadian-based mining company focused on coal, coking coal … Coal mining – Wikipedia, the free encyclopedia. Strip mining exposes the coal by removing the … reaches a predetermined stripping ratio (tons of overburden/tons of coal …
Read More
strip ratio in coal mining. Australia coal mine automation could increase … This analysis was based on an average surface coal mine operating at the midpoint of the Australia cost curve and assumed a surface coal mine with a strip ratio of bank cubic metres per raw tonne, producing 10 million tonnes per year of raw coal with a productivity of 13,333 raw tonnes per employee.
Read More
* Thus in coal SR is the number of BCM of waste that needs to be removed to uncover 1 t of coal * Some applies in other bedded deposits. b. Ore miners measure both waste and ore in tons or tonnes. ... Switch to underground mining if your stripping ratio is more than BESR. a. May or may not be economically feasible * Consider value of ore. b ...
Read More
Additionally, the stripping ratio can be a dynamic parameter in a mine, changing over the years, depending on the cut-off-grade strategy and the overall mine planning of the project.
Read More
The initial operations will be performed at Chipanga seam with the aim to achieve higher coal recovery with a lower strip ratio. The coal handling and processing plant at the mine will have a processing capacity of 24,000t per hour. It is estimated to process approximately 17 million tonnes of coal …
Read More
Academia.edu is a platform for academics to share research papers.
Read More
Oct 23, 2017· Niladri Bhattacharjee, partner, strategy & operations, mining & metals at KPMG in India said: "Some of the blocks may be costly due to high stripping ratio and evacuation issues. However, given the current shortage of coal, interest may be there for the blocks.
Read More
In coal mining what is a good strip ratio? Asked by Wiki User. 9 10 11. Answer. Top Answer. Wiki User Answered . 10:13:07 10:13:07. 1. Overburden O/B. 2. Coal / ore. 3 ...
Read More
Stripping ratio - Wikipedia. In mining, stripping ratio or strip ratio refers to the ratio of the volume ofoverburden (or waste ... removal prior to ore extraction, underground miningoperations tend to have lower stripping ratios due to increased selectivity. ...Open-pit mining... Get Quote; Details of the Open pit Mine …
Read More
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.
Read More
The economic stripping ratio varies widely from mine to mine, depending upon a number of factors. In the case of direct shipping ores, it may be as high as 6:1 or 7:1. In the case of low grade ore, a stripping ratio of less than 1.5:1 is often considered as an economic limit. For mining of the iron ore, it is essential to uncover the mine area ...
Read More
Jan 09, 2016· vii) Stripping Ratio The ratio is most commonly expressed as: Strip Ratio (SR) is the mass of waste to be mined to obtain one unit mass of ore. Waste (tons) SR = ----- Ore (tons) For example, a 3:1 stripping ratio means that mining one cubic meter of ore will require mining three cubic meters of waste rock.
Read More
Jul 25, 2018· 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 wil...
Read More