Establishment of standards for air leakage through the mined-out space
Abstract
The present work aims to establish the normal values of air leakage through the mined‑out space on the basis of mine observations carried out by the Department of Mine Ventilation of LMI during 1953 and 1954 at 75 mines in Donbass. Although observations of air leakage in 65 faces were carried out, the obtained material was still insufficient to establish the dependence of the norm of air leakage through the mined‑out space on the depression between the haulage and ventilation drifts, the seam occurrence, the nature of the roof rocks, the depth of mining, the face advance rate, etc. All these factors have a greater or lesser degree of influence on air leakage through the mined‑out space. It is currently impossible to give an expression that would reflect the dependence of the air leakage value on all these factors. The solution of this complex problem requires additional research. We declined to solve this problem also for the following reason: as our observations have shown, when the specified factors change, they vary very insignificantly – within 5‑6%.
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