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Soviet Mining

, Volume 14, Issue 2, pp 157–165 | Cite as

Determination of the shift of stowed material during ore breaking in a confined space

  • V. F. Abramov
  • V. A. Gorbunov
Rock Breaking
  • 15 Downloads

Conclusions

  1. 1.

    On the basis of the Johannson model and making the assumption that expansion of the gas is adiabatic, the authors have determined the gas pressure in the boreholes (cracks) at the moment of detachment of a layer of ore from the solid.

     
  2. 2.

    On the basis of the characteristics of the mechanical behavior of granulated material, which the confining medium consists of in the case in question, and using the energy approach, they have derived an equation of the movement of the detached ore layer, Eq. (15). In this connection the shift of the confining medium is a function of many parameters characterizing the explosive, the mechanical properties of the ore being detached and the confining material, and the technological dimensions.

     
  3. 3.

    They examine certain specific examples of calculation from Eq. (15). All the results are plotted on corresponding graphs and in Table 1

     

Keywords

Free Surface Tangential Velocity Wave Trap Rock Breaking Compaction Zone 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Literature Cited

  1. 1.
    K. Johannson and P. Pearson, Detonation of Explosives [Russian translation], Mir, Moscow (1973).Google Scholar
  2. 2.
    C. H. Noren, “Blasting experiments in granite rock, Q. Col. School of Mines, No. 3, 51, 191 (1956).Google Scholar
  3. 3.
    H. Jones and A. R. Miller, Proc. R. Soc.,A194, 480 (1948).Google Scholar
  4. 4.
    D. Drucker and V. Prager, Soil Mechanics and Plastic Analysis of Limiting Planning [Russian translation], Mir, Moscow (1975).Google Scholar
  5. 5.
    P. Chadwick, A. Cox, and H. Hopkins, Mechanics of Deep Underground Explosions [Russian translation], Mir, Moscow (1966).Google Scholar
  6. 6.
    A. Egorochkin, “Investigation and selection of parameters of ore breaking in a confined space to improve the extraction performances in systems with caving,” Candidate's Dissertation, Ust'-Kamenogrosk (1971).Google Scholar

Copyright information

© Plenum Publishing Corporation 1979

Authors and Affiliations

  • V. F. Abramov
  • V. A. Gorbunov

There are no affiliations available

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