| 释义 |
tunneling advance rate
基本例句
掘进速度
Along with the rapid development of coal industry, it is higher request to the laneway tunneling speed.随着煤炭工业的迅速发展，对巷道掘进速度的要求也越来越高。
Under gassy coal seam condition, the full-heading development is employed.Because of the fast heading a high rate of gas emission arises.在瓦斯含量较大的煤层采用综掘掘进巷道，由于掘进速度快，出现了瓦斯涌出量过大的现象。 |