The experiment on the elasticity resisting coefficient of rock mass is very difficult to be done, so it is conducted only in the pressure tunnel of oversize hydroelectric projects.
岩体弹性抗力系数试验难度大，一般只在特大型水电工程有压隧洞中进行。
The experiment on the elasticity resisting coefficient of rock mass is very difficult to be done, so it is conducted only in the pressure tunnel of oversize hydroelectric projects.
岩体弹性抗力系数试验难度大，一般只在特大型水电工程有压隧洞中进行。
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