composition of either coal overburden or parting materials in this area although boreholes in Area 2 may have some bearing on the geology of the South eastern side of the mine
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Get PriceAn approach towards ascertaining open pit to underground transition depth Eezzaddin Bakhtavar † Koroush Shahriar † Kazem Oraee ‡ In relation to the practice of surface mining of coal deposits it is common to describe the To develop a pit design requires the establishment of the Break Even Stripping Ratio
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