Conclusion
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1.
The model of fracture by a percussive tool, developed by the authors, qualitatively, represents the overall fracture pattern, particularly the existence of a core; it permits calculation of the grain-size composition and the characteristic dimensions of the fracture hole.
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2.
An example of the operation of a percussive tool, particularly the optimal operating conditions, is examined.
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Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 3, pp. 34–39, May–June, 1978.
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Kuznetsov, V.M., Sofronov, S.T. Toward a hydrodynamic theory of the fracture of rocks by a percussive tool. Soviet Mining Science 14, 263–267 (1978). https://doi.org/10.1007/BF02499323
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DOI: https://doi.org/10.1007/BF02499323