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Experimental investigation of seismic waves during firing of external (contact) charges

  • Rock Breaking
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Soviet mining science Aims and scope

Conclusions

  1. 1.

    Despite the instruction in [4], when an external charge is exploded we cannot completely ignore the seismic effect.

  2. 2.

    When an external charge is exploded the maximum rate of displacement of the ground is recorded in wave B, excited by the air shock wave at the observation point.

  3. 3.

    The rate of displacement in wave B can be determined by means of Eq. (7), if we know the pressure at the air shock wave front at the given point, and the acoustic impedance of the upper layer of the earth.

  4. 4.

    The rate of displacement in wave B decreases rapidly with depth; this reduces the hazard of this wave for buildings, because the foundations of most of them are buried.

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Literature Cited

  1. Ya. I. Tseitlin and N. I. Smolii, “Effect of an explosion on the rock foundation bed of foundation pits of hydraulic structures,” Gidrotekh. Stroit., No. 7 (1972).

  2. Ya. I. Tseitlin, Recommendations for Investigating the Seismic Danger of Mass Explosions [in Russian], TsBNTIminmontazhspetsstroya SSSR, Moscow (1974).

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  3. N. I. Smolii and Ya. I. Tseitlin, “Simplified calculation of pressure at the front of weak air shock waves during explosions of external charges,” Spets. Raboty. v Promysh. Stroit., Seriya V minmontazhspetsstroya SSSR, No. 12 (1976).

  4. Appendix. Nine Common Rules for Safety in Explosions [in Russian], Nedra, Moscow (1972).

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Authors
  1. N. I. Smolii
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  2. Ya. I. Tseitlin
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Additional information

Soyuzvzryvprom. Moscow. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 36–41, January–February, 1980.

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Smolii, N.I., Tseitlin, Y.I. Experimental investigation of seismic waves during firing of external (contact) charges. Soviet Mining Science 16, 30–34 (1980). https://doi.org/10.1007/BF02504284

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  • DOI: https://doi.org/10.1007/BF02504284

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