摘要
介绍了长距离掘进煤巷局扇压入通风时 。
Described is the relaiton of the wind leakage ratio of gas concentration in cross section with the ventilation tube at the fan during the filling wind with local fan in long drilling.
出处
《河北煤炭》
2001年第2期12-13,共2页
Hebei Coal
关键词
局扇
漏风率
瓦斯浓度
风筒
防治
风阻
local fan
ventilation
wind leakage ratio
gas concentration
