Zobrazeno 1 - 1
of 1
pro vyhledávání: '"advance monitoring"'
Publikováno v:
Meikuang Anquan, Vol 52, Iss 6, Pp 98-103 (2021)
When two U-shaped ventilation working faces of shallow and near coal seams are mined in opposite directions, the series ventilation phenomenon that the above goaf is the main air leakage channel is easy to occur. In view of the situation of air leaka
Externí odkaz:
https://doaj.org/article/776878eed14b49ec8fd6c68590461a48
