super-large cavern 特大型溶腔
large cavern group 大型洞室群
large span cavern 大跨度洞室
large group-cavern 大型洞群
large span underground cavern 大跨度地下洞室
large-scale underground cavern 大型地下洞室
large-scale underground cavern group 大型地下洞室群
They explored the large cavern at the base of this cliff.
他们勘探了这个悬崖底部的大洞穴。
This paper approaches the excavating dynamic behavlour and support design for a large cavern in Nanfen Iron Mine using finite element method.
针对南芬铁矿地下硐室开挖与支护设计，采用有限元分析研究大跨度地下硐室施工的动态力学效应。
An ancient man-made near ground surface rock cavern group was found in Longyou County, Zhejiang Province. The 24 large caverns were excavated 2000 years ago.
浙江省西部龙游县的龙游大型古地下洞室群由24个洞室组成，该洞室群开挖于2000年前。
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