If the rock mass behaved brittle, splitting cracks would happen on the high side wall of underground caverns.

若岩体呈脆性，则在地下厂房的高边墙常常产生劈裂裂缝区。

youdao

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。

youdao

The fourth side was partly closed by a high wall, surmounted by jagged edges of broken glass set firmly in old lime plaster, and pierced in its center by a wide entrance-way.

NEWYORKER: A Man And A Woman