Soviet Mining

, Volume 19, Issue 1, pp 71–75 | Cite as

Patterns and laws of dilution and outflow of gaseous products from slot chambers

  • G. V. Kalabin
Mine Aerodynamics


  1. 1.

    Ventilation of flat chambers occurs—simultaneously—through dilution of gaseous products, and their transport in a concentrated form, and is generally characterized objectively by the output parameter c=f(τ) in a “black box” description.

  2. 2.

    The efficacy of ventilation of flat chambers depends on the relationship between the primary outflow of impurity in a concentrated form and the subsequent dilution and outflow of residual impurities; it is decreased with decreasing degree of cross-sectional constraint of the jet.

  3. 3.

    A decrease of the cross-sectional constraint of the jet from 1 to 0.2 is accompanied by a regular transition of the curves describing the reduction of toxic impurity concentration as a function of time from a unimodal to bi- or trimodal pattern.



Residual Impurity Hydraulic Model Electrode Sensor Regular Transition Rare Metal Deposit 
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Literature Cited

  1. 1.
    I. I. Medvedev, Ventilation of Potassium Mines [in Russian], Nedra, Moscow (1970).Google Scholar
  2. 2.
    G. A. Radchenko, Dust-Removing Ventilation of Underground Workings [in Russian], Nauka, Alma-Ata (1970).Google Scholar
  3. 3.
    I. G. Gurshev, Turbulent Jet in a Constrained Volume [in Russian], Kaz. SSR, Inst. of Mining, Alma-Ata (1974). (Deposited with VINITI, No. 84-75, Jan. 13, 1975).Google Scholar
  4. 4.
    Yu. N. Pervov, “Calculation of free turbulent jets propagating in constrained volumes”, in: Problems of Mine Aerology and Sudden Coal and Gas Bursts [in Russian], Izd. Akad. Nauk SSSR, Moscow (1958).Google Scholar
  5. 5.
    G. V. Kalabin, “Experimental studies of the opening of constrained turbulent flows”, Fiz. -Tekh. Probl. Razrab. Polezn. Iskop., No. 5, (1981).Google Scholar
  6. 6.
    G. V. Kalabin and V. S. Romanov, “Results of experimental studies of aerodynamics of flat chambers,” in: Ventilation of Mines [in Russian], Issue 6, Leningrad (1979).Google Scholar

Copyright information

© Plenum Publishing Corporation 1983

Authors and Affiliations

  • G. V. Kalabin

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