A classification method of surrounding rock mass in hydropower project in high geostress area

作者：Shen Yanjun^*; Xu Guangli; Song Shengwu; Li Zhipeng; Feng Xuemin; Dong Jiaxing

来源：Chinese Journal of Rock Mechanics and Engineering, 2014, 33(11): 2267-2275.

DOI：10.13722/j.cnki.jrme.2014.11.011

• Classification methods
• Comparative analysis
• Engineering geological characteristics
• HC method
• High-geostress
• Hydropower projects
• Hydropower stations
• Surrounding rock mass

The engineering geological characteristics of the surrounding rock of large hydropower caverns in high geostress areas are very different from those in the normal geostress area. So the rock classification and evaluation system should be different. However, the hydropower classification(HC) method of rock mass for evaluating the rocks in high geostress areas has still many defects, and has caused some deviations between the evaluated results and the real situations. The purpose of this paper is to correct and optimize the HC method in high geostress areas. Firstly, the problems existed in the HC method were analyzed comprehensively, and some appropriate amendments were proposed. Secondly, some new proposals for ground stress evaluation and classification criteria were proposed through extensive collecting and collating of the information of high geostress of the current large-scale hydropower projects. Then, the evaluation ideas and methods of HC for high geostress areas were optimized systematically and the corresponding methods of optimization were proposed. Finally, the plant of Houziyan hydropower station under construction was analyzed, and the comparative analysis was made to confirm the suitability of this optimization method.

• 出版日期2014