Literature Cited
F. I. Boreiko and V. K. Piskarev, “Method of assessing the stress in the solid rock,” Inventor's Certificate No. 286254, Byull. Izobret. Otkr., No. 34 (1970).
Additional information
All-Union Scientific-Research Institute of Mine Surveying, Leningrad. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 82–85, January–February, 1980.
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Protopopov, I.I., Piskarev, V.K. Assessing the state of rock by sound ranging with artificial excitation of acoustic activity. Soviet Mining Science 16, 70–73 (1980). https://doi.org/10.1007/BF02504291
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DOI: https://doi.org/10.1007/BF02504291