New approaches towards improving mine ventilation network analysis
Based upon a numerical test approach by computer,the relationship between relevant parameters was investigated based on five complicated mine ventilation systems.These parameters are: branch number,node number,mesh number,computation accuracy,arbitrary given value of airflow rate,iteration number,computation time,convergence erc,in mine ventilation network analysis,The results show that a high degree of a given computation accuracy significantly influences the iteration number.In particular,when the nominal accuracy attains 10-6 m3/s in order to solve a complex mine ventilation network,the running time is far too long even though a high-speed computer is used.The size of the given value of airflow rate has little effect on the iteration number,and any value between 1 and 100 m3/s can be set.The structure of a network has also some effect on the iteration number.When the resistance of a branch in a network is increased to a high value such,as by setting a seal in a branch,the results of the whole network analysis are normal even then,and the iteration technique can play the same function.
Mine ventilation Network analysis Numerical test Parameters adjustment
Wu Guomin Wu Chao Wang Conglu
School of Resources and Safety Engineering,Central South University,Changsha 410083,China
国际会议
The 2007 International Conference on Mine Hazards Prevention and Control(2007矿山灾害预防与控制国际学术会议)
青岛
英文
22-28
2007-10-17（万方平台首次上网日期，不代表论文的发表时间）