Speed of deepening of an open pit at application of draglines
Abstract
The use of mechanical shovels for preparation of new horizons in weak water-saturated rocks (sands, loams) with reduced bearing capacity is associated with great difficulties and requires good preliminary dewatering of the rocks. Practice of designing and construction of quarries has shown expediency and efficiency of application of advance drainage trenches. Digging is carried out by draglines in loose covering rocks, filtration properties of which provide drainage of rocks in trench sides on the width of excavator's run for the period of excavator's working out of its block. Thanks to this method at the open pits of Sokolovsko-Sarbaisky combine it was possible to reduce the construction time, as the stripping and dewatering works were carried out simultaneously.
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References
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- Mustafina A. M. Scientific bases of intensification of construction of large open pits in difficult mining and geological conditions. Author's abstract of dissertation Avtoref. dokt. diss. In-t fiziki Zemli AN SSSR, 1970. (in Russian)
- Plyaskin I. I. Organization of Stripping Works at Sokolovskiy and Sarbaiskiy Open Pits. Nedra, 1964. (in Russian)