Conclusions
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1.
The grain-size composition of the blasted rock of the LGOK quarry at the +30, +15, and +0 m horizons for rocks of similar geological structure must be measured not at the surface of the rubble but at the working excavator face.
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2.
The yield of the +400 mm fraction can be used as a criterion of the fragment size in the conditions of the LGOK quarry.
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Literature Cited
L. I. Baron, Fragment Size and Methods of Measuring It [in Russian], Izd. AN SSSR, Moscow (1960).
L. I. Baron and G. M. Babayants, “Investigation of ore crushing in transport down an ore chute in the Kadzharanskii mine,” Promyshl. Armeniya, No. 5 (1959).
Additional information
Scientific-Research Institute for the Kursk Magnetic Anomaly (NIIKMA). Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, Vol. 12, No. 1, pp. 123–125, January–February, 1976.
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Terent'ev, V.I., Gubkin, V.I., Semun'kin, M.B. et al. Method and site for measuring fragment size of blasted rock, and criterion for assessing it, in the LGOK quarry. Soviet Mining Science 12, 122–124 (1976). https://doi.org/10.1007/BF02497629
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DOI: https://doi.org/10.1007/BF02497629