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Determination of the optimal practical characteristics of hydraulic machines in open-cut mines

  • Rock Breaking
  • Published:
Soviet Mining Aims and scope

Summary

  1. 1.

    To ensure minimal cost of hydraulic mining per m3 with maximal performance of the hydraulic machines, we must observe the condition of minimum specific energy consumption on the separation of the rock from the face and on its removal by the hydraulic jets.

  2. 2.

    Minimal energy consumption on hydraulic breaking is obtained with an optimal pressure head at the nozzle of the machine; this pressure head is selected in accordance with the required specific pressure of the jet for cutting rock of a specific hardness.

  3. 3.

    For the selected pressure head we determine the optimal nozzle diameter which bestows on the jet the most advantageous hydrodynamic properties.

  4. 4.

    For the known specific energy consumption, pressure head of the water and nozzle diameter we determine from Eq. (3) the number of hydraulic face machines required to ensure a given hydraulic cutting performance.

  5. 5.

    We then determine the hydraulic face characteristics and the working system (face width, interval of advance, and the volume of rock brought down from one sitting of the machine) and calculate the pump characteristics from Eq. (4).

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Literature cited

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Authors
  1. V. F. Khnykin
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  2. K. I. Yafarov
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Additional information

Skochinskii Mining Institute, Moscow. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp.92–97, July–August, 1967.

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Khnykin, V.F., Yafarov, K.I. Determination of the optimal practical characteristics of hydraulic machines in open-cut mines. Soviet Mining Science 3, 392–395 (1967). https://doi.org/10.1007/BF02497565

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  • DOI: https://doi.org/10.1007/BF02497565

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