大断面巷道  large section tunnel; Drift with large cross section area; roadway with large sections; large-scale roadway; large section roadway

大断面巷道(硐室)  large section tunnel

大断面巷道掘进  large section tunnel advance

大断面岩巷  Large cross section rock roadway

煤巷大断面  coal large section

浅埋大断面大跨度  sallow large section and span

浅埋大断面大跨度连拱隧道  Shallow-covered Large Cross-section and Large-span Double-arch Tunnel

特大断面大跨度隧道  ultra large-span tunnel with super-large cross-sec; ultra large-span tunnel with super-large cross-section

扁宽断面巷道  roadways of flat and wide cross-section

掘进巷道断面  laneway section

廊道断面面积  area of culvert transect

卵形巷道断面  egg form section

巷道断面设计  tunnel section design

巷道断面形状  cross-section shape of roadway

破碎软岩巷道  incompact and fractured soft-rock roadway

软岩巷道  roadways of soft rock; soft roadway; soft rock roadways; soft rock tunnel; drift in soft rock; soft rock gateway; Soft rock gallery; mine soft rock roadway; Roadway within Soft Rock; tunnel with soft wallrock; soft rock roadway; soft-rock roadway; soft rock excavation; soft rock laneway; soft rock entry

软岩巷道围岩变形  deformation of the soft rock around tunne ls

软岩巷道修复  soft rock drift renovation

软岩巷道支护  soft rock roadway support