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。
The Longyou large ancient underground caverns contains the long-term integrity about two thousands years, but the field investigations show that the caverns are being up against many diseases.
龙游大型古地下洞室群虽然已保持了长达两千年之久的完整，但是现场调查发现，这些洞室存在着许多病害现象。
In 1992, four local peasants found large-scale ancient man-made shallow rock caverns in Longyou, Zhejiang.
一个超浅埋大型古地下洞室群于1992年在浙江省龙游县被四个农民发现。
With the increase of imported petroleum in China, constructing large underground petroleum storage caverns is no doubt a project with better comprehensive economic effect.
随着我国石油进口量的不断增加，建造大型地下储油洞库无疑是一种综合经济效益良好的方案。
However, evaluation methods of wall rock stability in underground cavern groups with high side-wall, large span and intersect caverns are required for actual projects such as Nuo Zhadu.
但在实际的工程中，特别是对于糯扎渡这种边墙高、跨度大、洞室相互交错的地下洞室群的围岩稳定性问题，还缺少系统的评价方法。
Based on a large number of studies, the construction procedures and supporting parameters for underground caverns, especially the main powerhouse, are determined.
通过大量的科研设计，确定地下洞室群尤其是主厂房的施工程序和支护参数。
The practical control procedure of construction schedule and quality is advanced based on the construction characteristic of large scale underground caverns.
根据地下洞室群施工特点，分析了进度与稳定分析联合实时控制的流程。
The practical control procedure of construction schedule and quality is advanced based on the construction characteristic of large scale underground caverns.
根据地下洞室群施工特点，分析了进度与稳定分析联合实时控制的流程。
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