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。

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The stability problem of wall rock was prominent, and the factors that affect the wall rock stability including karst, disadvantage structure surface, and the block body combined by the two factors.

乌江构皮滩水电站电站厂房为岩溶地区修建的特大型地下厂房，围岩稳定问题较突出，影响围岩稳定的因素主要有岩溶与不利结构面及其组合的块体等。

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At the same time, the reasonable estimate about the stability of wall rock and timbering parameter supplies designers and builders with the beneficial reference.

同时对围岩稳定性和支护参数进行了合理性评价，为设计和施工单位提供了有益的参考意见。

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