Determination of a matrix column of air volume output sensitivity to changes in side branches resistance in a mine ventilation network

Abstract

Ventilation networks in collieries are exposed to production-induced or accidental changes in air volume distribution evoked by various factors, including planned, accidental or emergency changes in side branches resistance. The distributed air reacts to such changes, which may have a negative impact on the state of hazards eliminated by ventilation methods. The propagation of disturbances in ventilation systems in collieries may be analyzed by simulated computations of air volume distribution in the ventilation network. In the analysis of the disturbance pattern propagation, methods utilizing the theory of sensitivity are useful. The discussed method of determining a matrix column of air output sensitivity to changes in side branches resistance is useful in the solution of many problems occurring in ventilation net-works in collieries.