E3S Web Conf.
Volume 194, 20202020 5th International Conference on Advances in Energy and Environment Research (ICAEER 2020)
|Number of page(s)||5|
|Section||Environmental Engineering, Ecological Environment and Urban Construction|
|Published online||15 October 2020|
Fine quality evaluation of surrounding rock of an underground hydropower station
1 College of Civil Engineering and Mechanics, Lanzhou, Gansu 730000, China
2 Key Laboratory of Mechanics on Disaster and Environment in Western China ,Lanzhou University, The Ministry of Education of China, University, LanZhou , Gansu 730000, China
Using RMR surrounding rock classification method, the surrounding rock quality of underground main powerhouse of a hydropower station is evaluated with a small evaluation unit. The results of surrounding rock classification show that the surrounding rock of main powerhouse is mainly Grade III, and Grade II and IV surrounding rock develop intermittently with the depth of main powerhouse, and there is no Grade I or V surrounding rock distribution. Secondly, setting a smaller evaluation section is conducive to improve the accuracy of surrounding rock quality evaluation and better grasp the distribution of different grades of surrounding rock in the evaluation area.
© The Authors, published by EDP Sciences, 2020
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