Under conditions of railroad transportation and use of single-bucket excavator optimum height of bench depends on costs of mining equipment and on maintenance costs; methods of blasting have to produce fragments of desired size at given height of bench; optimum height of bench in open pits with output of 10-15 million cu m/yr has to be 24-26 m; formulas for calculation of rate of face progress, number of cars necessary to transport rock, height of bench, angle of bench slope, and volume of work to be done when height of bench is increased.
Method of determining optimum height of bench
Metod opredeleniya optimal'noi vysoty ustupa
Gornyi Zhurnal ; n 3
1964
4 pages
Aufsatz (Zeitschrift)
Russisch
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Emerald Group Publishing | 1940
|Engineering Index Backfile | 1940
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