Brief analysis on accessory matching and setting to yieldable arch steel support 拱型金属可缩性支架附件配设浅析
2.
According to calculations , it was necessary to adopt a new type of structure of the shaft lining with vertically yieldable segments for reason of safety 分析计算表明：应采用竖向可缩新型井壁结构防止井壁因冲积层疏排水而破坏。
