白鹤滩大型地下厂房开挖围岩片帮破坏特征、规律及机制研究

发布时间：2018-03-03 12:07

本文选题：岩石力学　切入点：地下厂房　出处：《岩石力学与工程学报》2016年05期 　论文类型：期刊论文

【摘要】：在建的金沙江白鹤滩水电站地下厂房开挖规模巨大,其复杂地质条件和高应力导致围岩破坏现象突出。针对左、右厂房第一层开挖过程中曾频繁遭遇到的围岩片帮破坏问题,结合地质、施工、测试、试验及数值分析资料,全面总结和深入分析玄武岩片帮机制。首先,归纳和总结地下厂房围岩片帮破坏的基本特征与规律,包括其表现形式、形态特征、空间位置、破坏规模、滞后规律、破坏发展特征、对应岩性及支护特征等主要信息;进而重点探讨厂区地应力、岩体结构、岩性、施工因素等对围岩片帮的影响规律;最后,综合分析揭示片帮的形成与发生机制。该研究可为白鹤滩水电站地下厂房后续开挖过程中围岩片帮破坏的预防和调控提供重要支撑,也可为同类高地应力条件下大型地下洞室类似围岩破坏的防控提供参考。
[Abstract]:The underground powerhouse of Baeketan Hydropower Station in Jinshajiang River is excavated on a large scale, and its complex geological conditions and high stress cause the failure of surrounding rock. Combined with geological, construction, test, test and numerical analysis data, the basalt slab mechanism is summed up and analyzed thoroughly. Firstly, the basic characteristics and laws of wall rock slab damage in underground powerhouse, including its manifestation, are summarized and summarized. The main information, such as shape, space position, damage scale, lag law, damage development characteristic, corresponding lithology and support characteristic, etc., are discussed in detail, such as ground stress, rock mass structure, lithology, etc. Finally, the comprehensive analysis reveals the formation and occurrence mechanism of the slab, which can provide important support for the prevention and control of the damage of the surrounding rock slab during the subsequent excavation of the underground powerhouse of Baihetan Hydropower Station. It can also provide a reference for the prevention and control of similar surrounding rock damage of large underground caverns under the condition of similar high ground stress.
【作者单位】：中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;东北大学深部金属矿山安全开采教育部重点实验室;中国长江三峡集团公司;
【基金】：国家自然科学基金国际合作重大项目(41320104005);国家自然科学基金重点项目(11232024)~~
【分类号】：TV223

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