Experimental investigation of air propagation in workings of underground mines

Author: W. Cierniak

Of particular interest is the number of branches of a minę ventilation network, where the max fluxes are to be measured so that by applying node equations the mass fluxes in the remaining branches can be obtained.

The chapter 2 is devoted to estimation of this number of branches The available methods for measuring the mass flux in a single branch are outlined.

The methods for determining the air flow quan-tities in minę headings are briefly outlined in chapter 3, covering:

3.1.Measurements through a window in a dam

3.2.Measurement using an inflow nozzle

3.3.Measurement of the pressure drop in the gallery section

3.4.Measurement of the increase of marker concentration

3.5.Correlation methods utilising markers

3.6.Tomography using ultrasound indicators.