coal mining stripping ratio

Stripping Ratios: What are They and Why are They

31102018· Calculating stripping ratios At their most basic, strip ratios can be calculated by dividing overburden thickness by ore thickness For example, an overburden thickness of21022021· 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 oreWhat Is a Stripping Ratio? (with picture)The Coal Area Strip Mine Formula • Strip Ratio = OB Thickness (in ft) * 1111/ Coal thickness in inches – Assumes coal is 80 lbs/ft^3 (good for bituminous) – Area Strip Mine Geometry – Geologic Stripping Ratio – no accounting for rehandle or less than 100% coal recovery Your Turn • Use What You Have Learned About Calculating Stripping Ratios for Strip Mines and Break Even Limits to Determine the(PPT) Calculating Stripping Ratios for Area Strip Mines

Stripping Ratio | Mineral Production Activities

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 Stripping ratio is influenced by the shape of the orebody and may vary considerably during the life of the mine Except in rare cases, it increases with depth of the orebody below surface The unit cost of mining may increase over the life of a pit due to increased stripping ratio andGood strip ratio for a coal mine In mining stripping ratio or strip ratio refers to the ratio of the volume of overburden or waste material in coal mining what is a good strip ratio coal mining stripping ratio crusherasia stripping ratios surface mining coal mining and in cDetailsIn Coal Mining What Is A Good Strip RatioFor open pit mining the costs are $040/ton ore and a stripping cost of $050/ton of waste SR = (300 –040)/050 = 52 tons of waste/ ton of ore ie while the stripping ratio is less than 52 it is most economical to mine the deposit by open pit(PDF) Stripping Ratios, Pit Limits & Cutoff Grade

Coal Ratio an overview | ScienceDirect Topics

Coal mining in under Indian scenario, the above ratio is given as 25:1 at present rate Physical characteristics of the seam such as its inclination, presence of dirt or waste bands, variation in thickness and quality of coal influences the decision on adoption of opencast mining With dipping seams, the quantity of overburden to be removed rapidly increases as the coal is followed down the dip until aA low grade ore body cannot support a high stripping ratio Thus you may have a range of stripping ratios from 1:1 to 1:15 or even more Thus you may have a range of stripping ratios from 1:1 to 1Whats the average stripping ratio of open pit mines aroundstripping ratio Coal blocked in barriers and/or below surface features like, village, road, power transmission lines, forests, hills, etc 16102012 15 Higher production rate (2500 to 4000 TPD) with less manpower Remote controlled operations and thus greater safety Uniform sized coal obtained, no further crushing is required No men are entering the mine workings and thus it eliminates allMODERN MINING TECHNOLOGY FOR COAL EXTRACTION

Breakeven stripping ratio | Britannica

In coal mining: Contour strip mining If the breakeven 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 augering22042021· 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 time (suppose 15 years) against the production of 10 lakh Te of coal, the standard stripping ratio will be 21Ministry of Coal, GOICalculating 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 SMEs Surface MiningLecture 4 Calculating Stripping Ratios for Area Strip

In Coal Mining What Is A Good Strip Ratio

Coal Briquette Machine: in coal mining what is a good strip ratio The strong briquetting machine is mainly used for coal powder, coalclay, coke, coke powder, refractory and metallurgical powder cold pressed Pellet All powdered materials need to be furnaced can be completed by the strong briquette machine Get Price 11 phases of a mining project openpit mining is a type of strip16122016· 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 Our analysis suggests that theCan Indonesia's coal mines maximise strip ratios andstripping ratio Coal blocked in barriers and/or below surface features like, village, road, power transmission lines, forests, hills, etc 16102012 15 Higher production rate (2500 to 4000 TPD) with less manpower Remote controlled operations and thus greater safety Uniform sized coal obtained, no further crushing is required No men are entering the mine workings and thus it eliminates allMODERN MINING TECHNOLOGY FOR COAL EXTRACTION

Surface mining planning and design of open pit mining

09012016· 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 • Syncrude Tar Sands: SR = 12 14 • Highland Valley: SR ~05 • Bagdad mine: SR ~12 • Cortez mine: SR = 16 Examples: 2 February 2016 Prof Dr HZ Harraz Presentation Stripping Ratios Stripping ratio is defined as theIn most surface coal mines with near horizontally burial strata, inpit dumping will cover the endwall slope of the previous mining district, causing increased secondary stripping amount when the(PDF) Surface Coal Mining Methods in Australiastripping ratio in coal mining Indonesia could deplete coal reserves by 2033 PwC Reuters Mar 07, 2016· However, declining stripping ratios and profitability have led to a drop in coal reserves of 30 to 40 percent, Diran said, noting that the survey found coal reserves of between 73 billion and 83 Know More Mine wastes management Mining and Blasting The ratio of overburdenstripping ratio in coal mining

Mozambique: Moatize Coal Mine | IEA Clean Coal Centre

04032021· The new mining plan incorporates the prioritisation of ore bodies of better quality and better stripping ratio in order to yield a better product mix with significant cost reduction The two coal handling and processing plants (CHPPs) for the mine are also being revitalised as part of the operational improvement strategyCoal mining methodsCoal mining methods Stripping RatioStripping Ratio = Volume of Material (Volume of Material (bcmbcm)/)/ Extraction of Coal (ROMExtraction of Coal (ROMtontonton ))*) 4 Strip Mining 5 Oppp g(en pit mining (shovel & truck): flexible 6 Seismic survey and exploration drilling 7 Topsoil stripping by bulldozer or scraperor scraper 8 Overburden drilling for blast holes andCoal mining methodsCoal mining methodseffect of stripping ratio in coal mining Solution for Aug 31, 2012Chapter 2 The Environmental Effects of Strip Mining The Strip EFFECTS OF STRIP MINING A ll mining operations have a disruptive effect on the so long as the ratio between the overburden and the coal seam, called the stripping ratio, In coal mining what is a good strip ratio The QA wiki 1 Overburden O/B 2 Coal / ore 3 Getinfluence of striping ratio on open cast coal mining

In Coal Mining What Is A Good Strip Ratio

Coal Briquette Machine: in coal mining what is a good strip ratio The strong briquetting machine is mainly used for coal powder, coalclay, coke, coke powder, refractory and metallurgical powder cold pressed Pellet All powdered materials need to be furnaced can be completed by the strong briquette machine Get Price 11 phases of a mining project openpit mining is a type of stripstripping ratio Coal blocked in barriers and/or below surface features like, village, road, power transmission lines, forests, hills, etc 16102012 15 Higher production rate (2500 to 4000 TPD) with less manpower Remote controlled operations and thus greater safety Uniform sized coal obtained, no further crushing is required No men are entering the mine workings and thus it eliminates allMODERN MINING TECHNOLOGY FOR COAL EXTRACTION16122016· 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 Our analysis suggests that theCan Indonesia's coal mines maximise strip ratios and

Strip Mining an overview | ScienceDirect Topics

23 Strip Mining Strip mining is employed in coal reserves where the overburden is removed in rectangular blocks in plan view called pits or strips The pits are parallel and adjacent to each other Strip mining is fundamentally different from contour or area mining on how the overburden is displaced, called spoil handling In contour or area stripping, the overburden is hauled with differentCOAL MINE PLANNING & DESIGNAVREDDY, B Final pit limits Contd Estimation of Coal, OB & Stripping ratio Rough assessment is given below Assuming Pit slopes of 450, the Quarry floor and Quarry surface are delineated Volume of Coal & OB = Average area x Average depth (A) Average area = (Quarry surface area + Quarry floor area) / 2 Average depth = (Minimum depth + maximum depth) /Mine Planning Design | Coal Mining | Miningemployed when the depth of the deposit and/or the waste to ore ratio (stripping ratio) are too great to commence a surface operation Once the economic feasibility has been verified, the most appropriate mining methods must be selected according to the natural/geological conditions and spatial/geometric characteristics of mineral deposits Considerations include: 1 Spatial/geometricUnderground Mining Methods and Equipment

Coal Mining 101 – The Coal Seam

06052013· The economic viability of a surface mining project, calculated through the mining ratio, is highly mine and coal reserve dependent Sitespecific factors such as overburden type and depth, excavation costs, coal value and overburden haulage distances and costs are all considered in the development of stripping ratios for a particular mine site and coal reserve PHASE 2OPENCAST MINE PLANNING, DEPLOYMENT OF HEMM FOR OPTIMUM UTILISATION, TOTAL TECHNICAL PARAMETERS OF HEMM INCLUDING LIMITATIONS, & HAUL ROAD & ITS MAINTENANCE PD RATHI Sr Mining Engineer OPEN CAST MINE PLANNING Factors that influence planning: 1) Demand of coal a Countrywide demand b Regional demand 2) Distribution of coal deposits 3) Quality of coal 4) Pricing policy for coalOPEN CAST MINE PLANNING Mining and Blasting