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This process continues along parallel strips of land so long as the ratio between the overburden and the coal seam, called the stripping ratio, makes it economically feasible to recover coal. Mining may cease in a particular area, for example, where the coal seam becomes thinner or where the seam dips further below the surface.
Underground Mining Methods By Tayyab anwar These are the methods/techniques employed when the depth of the deposit,the stripping ratio of the overburden to ore . Check price. Chapter 15 Mineral Exploration Using Modern Data Mining . ... coal mining problems ppt ...
The ratio of overburden to coal (stripping ratio) There are two basic methods of underground coal mining methods. They are: i) Bord and Pillar method ii) Longwall method. Although the basic principles remain the same, there ... pillar method of coal mining has been done in depth range less than 300 m as at greater depths pillars experience crush.
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Coal mining methodsCoal mining methods ... Stripping RatioStripping Ratio = Volume of Material (Volume of Material (bcmbcm)/) ... truck): flexible 6. Seismic survey and exploration drilling 7. Topsoil stripping by bulldozer or scraperor scraper 8. Overburden drilling for blast holes and blasting 9. Blasting pattern (example)Blasting pattern ...
influence of striping ratio on open cast coal mining. INTRODUCTION TO MINING that can be utilized as fuels, such as coal, petroleum, natural gas, coalbed methane, gilsonite, and the first modern mine was an open pit, subsequent operations were determine the stripping ratio, the .
what is stripping ratio coal mining ppt Grinding Mill, Calculating Stripping Ratios for Area Strip Mines Mnge 315, you mine over the time Simple Stripping Ratios The 2D, More. influence of striping ratio on open cast coal mining.
Stripping ratio is a term that is derived from the mining industry and is used in reference to the openpit mining process The stripping ratio method of calculating the profitability of the mining procedure is commonly used in the ore or coal mining process
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Economic Surface Mining of Multiple Seams By THOMAS V. FALKIE' :md WlLLIAM E. PORTERt SYNOPSIS A, Xeological and mining conditions become more complex, and as overall mining economics become more marginal, shortand longrange decisionmaking regarding muIliplescam surface mining becomes more difficult.