The Ertan underground powerhouse, located in a high stress area, includes three large chambers linked by many tunnels and passages.

• 该厂房处于高应力区,由三个大洞室和许多与它们相连接的管道组成,所以厂房围岩的应力重分布和变形是一个典型而又复杂的空间问题。 为此采用了特别适于处理空间问题的边界元法。