On the movement of air in the face area of large-section blind headings

Abstract

In the mining industry, especially during the construction of hydraulic engineering structures, workings with a cross-section of 50–80 m² are driven over considerable lengths. To ventilate such workings, a large volume of fresh air must be supplied to the face through ventilation pipes. Sometimes this is practically difficult to achieve, since ventilation pipes have high resistance and allow significant leaks.

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