Establishment of norms of air leakage through the mined-out space

Abstract

The present work aims to establish the normal size 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 pumping and ventilation drifts, the elements of bedding, the nature of the roof rocks, the depth of mining, the rate of face movement, etc. All these factors have a greater or lesser degree of influence on the normal size of air leakage through the mined-out space. All this to a greater or lesser extent affects air leakage through the mined 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, air leakage through the mined-out space at change of the specified factors change very insignificantly - within 5-6%.