Estimation of Abnormal Roadway in Underground by Ventilation Data
A velocity of ventilation air in a roadway is a result of overall influence of not only theresistance of the roadway but also the resistance of other roadways，fans，and air temperatureetc.Therefore，when the velocity of the airflow of a certain roadway is different from as usual，it is guessed that there may be some change in underground.This cause might be an increase of airflow resistance of a roadway like sudden fall of the roadway ceiling，or temperature change like a fire in the mine.The airflow change is transmitted far faster than an actual speed ofthe ventilation air in underground，and theoretically it equals to the sound speed in air.Therefore，it is a powerful means to observe the velocity of the airflow continuously to detect an abnormalities in underground promptly，and to keep safety of the mine.At this time，it ispreferable to know not only the existence of the。abnormality but also the place where theabnormality is occurred from the data of the airflow velocity change.The influence on theairflow velocityexerted by a change in a certain location in underground is different in eachroadway.It is possible to estimate the location of the roadway in which the abnormality tookplace if the airflow velocity in two places or more in underground is measured in differentposition.This is an application of the ventilation network analysis.This paper describes thetheoretical method.
Mine ventilation Abnormal roadway Ventilation monitoring Ventilation resistanca
Masahiro Inoue Bingrui Li
Kyushu University,744 Motooka,Nishi-ku,Fukuoka,819-0395,JAPAN JCOAL,3-14-10,Mita,Minato-ku,Tokyo,108-0073,JAPAN
国内会议
安徽淮南
英文
467-478
2007-10-25（万方平台首次上网日期，不代表论文的发表时间）