Sensitiwity Study on Ventilation Parameter Changes in a Mine Ventilation System

摘要

The sensitivity analysis on ventilation parameter changes has been developed to predetermine, through a simulation program, the airflow distribution within a mine ventilation system when underground conditions and/or control states are changed. The rationale is to generate a cause and effect matrix of sensitivity factors, through iteratively solving the ventilation system, on a series of parameter changes including airway resistance, pressure drop and fan operating speed. The sensitivity analysis is then performed using sensitivity factors to evaluate the variation in airflow distribution and predict any potential undesirable effects such as a flow reversal in the system. Computer coding was developed to implement and incorporate the sensitivity analysis in the 3D-CANVENT ventilation software. A demonstration case study was based up on the ventilation system model of a Canadian underground mine operation that had been recently surveyed. The main purpose of the sensitivity analysis is to provide an advanced tool for optimizing complex mine ventilation systems, and ultimately assist in developing and operating the ventilation systems more efficiently such as for Ventilation-On-Demand (VOD). Through properly managing the airflow distribution in the ventilation system according to the mine activities taking place, the ventilation cost can be significantly reduced.