Dispersion phenomena in underground mine ventilation system is an important parameter in controlling the spreading of gas or other particulate matter throughout the mine. From the results of tracer gas measurement in underground mine ventilation, it was found that the evaluated dispersion coefficient is larger than theoretical value. The presence of cavities and dead ends in along mine ventilation airways are supposed to be the main cause of this finding. The trapped gas inside cavity also harmful for workers, therefore adequate ventilation should be provided to dilute. In present study, the air residence time in a cavity was investigated by using tracer gas released in cavity and the decay time was measured required for the gas to completely escaped. The air exchange rates and the cavity’s ventilation efficiency were investigated in correlation with cavity’s aspect ratio and free stream velocity.
|ジャーナル||Advanced Chemical Engineering Research|
|出版物ステータス||出版済み - 6 2014|
All Science Journal Classification (ASJC) codes
- Chemical Health and Safety
- Fluid Flow and Transfer Processes