Determination of mining parameters for low-capacity ledge development by draglines (on the example of the Kingisepp phosphate deposit)
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Abstract
The Kingisepp phosphate rock deposit is a horizontal stratum-shaped deposit with an average thickness of 2.5 meters and is characterized by significant water cut (in 1964, the average water inflow was 150 m3/h). Due to the pit's high ore output, the strip of uncovered reserves exceeds 200 meters. During the winter months, the phosphorite bed freezes and its mining is associated with drilling and blasting operations. It is well known that the depth of freezing of rocks depends largely on their moisture content. To reduce the level of groundwater can be carried out by a number of measures using the available at the quarry excavator ...
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References
- Norkin I. M. Development of calculation methods for rock transshipment beyond the contour of the quarry. Journal of Mining Institute, vol. XLIX, iss. 1, 1964.
- Rzhevskiy V. V. et al. Technology and complex mechanization of open pit mining of coal, ores and non-metallic minerals, vol. 3. Preparation of Rocks for Excavation, MIRGEM PH, 1963.
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