Underground tunnelsupport of soft expansion rock is a main difficulty in mine construction currently.
松软臌胀岩层的井下巷道支护是目前矿山建设中的一个主要难点。
2
In the tunnelsupport construction stress analysis, it is conventional to use two dimensional strain principle.
隧道支护结构应力分析习惯于采用平面应变问题来处理。
3
Evaluating and analyzing the safety factors of the surrounding rock and the liner, quantitative methods of designing loess tunnelsupport structure are formatted.