Studies of a Mine Ventilation System Optimization Based on Actual Mine Data. A study on the optimum control of a mine ventilation system (4 th Report).

The present paper describes the result of an application of the authors proposed method for optimizing a mine ventilation system to an actual mine. Practical methods for the optimization considering airflow distribution, energy consumption and other parameters are discussed. Also, an existence condition of an roadway which shows the cost saving character when the resistance is decreased by the excavation of an new roadway parallel to it or enlarging the sectional area of it is examined. The results are summarized as follows: (1) The application of an actual mine shows that the proposed method is practicable and gives effective methods for saving ventilation cost. (2) The effectiveness of the decrease in roadway resistance as an method for the saving of ventilation cost depends on the airflow rate, total cost and the time that the roadway is to be utilized.