宁国抽水蓄能电站凝灰岩倒转破碎成因机制研究  

Study on cause mechanism of reverse and fracture of tuff in Ningguo pumped-storage power station, Anhui Province

作　　者：胡富杭 李任杰 石豫川[2] 赖亚光 闫天 HU Fuhang;LI Renjie;SHI Yuchuan;LAI Yaguang;YAN Tian(Zhejiang HuaDong Construction Engineering Co.,Ltd.,Hangzhou 310014,China;State Key Laboratory of Geo-hazard Prevention and Geo-environment Protection,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]浙江华东建设工程有限公司,浙江杭州310014 [2]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《人民长江》2022年第6期134-140,共7页Yangtze River

基　　金：国家自然科学基金项目(41977237)。

摘　　要：岩体倒转及破碎为一种重要的变形破坏机制,对其成因机制进行研究具有重要意义。以安徽省宁国抽水蓄能电站上库岸边坡为研究对象,对倒转及破碎的空间分布特征进行分析,结合构造应力,确定凝灰岩似层面倒转及岩体破碎成因机制。调查表明:似层面倒转分布于F_(2)和f_(5)断层之间,结合板梁弯曲理论和底摩擦模拟试验,倒转主要由断层的牵引构造形成。F_(2)断层呈“右旋”运动,导致F_(2)断层NW盘岩体呈张拉应力状态,造成岩体破碎。似层面倒转过程以及后期的重力作用均对岩体破碎有一定的贡献作用。研究对揭示同类型边坡的工程地质特性具有重要的借鉴意义。Rock mass reverse and fragmentation are an important deformation and failure mechanism.It is of great significance to study the cause mechanism of reverse and fragmentation.Taking the bank slope of upper reservoir of the Ningguo pumped-storage power station in Anhui Province as the research object,the spatial distribution characteristics of reverse and fragmentation were analyzed,and combining with the tectonic stress,the formation mechanisms of tuff bedding-like reverse and rock mass fracture were determined.The investigation results showed that the bedding-like reverse was distributed between the faults F_(2) and f_(5).Combined with the plate girder bending theory and the bottom friction simulation tests,the reverse was mainly formed by the traction structure of the faults.As the fault F_(2) was in a‘right rotation movement,which lead to the tensile stress state of the rock mass in the NW wall of the fault F_(2),it resulted in the fragmentation of the rock mass.Both the reverse process of the bedding-like and the gravity action in the later stage contributed to the fragmentation of rock mass.The research on the genetic mechanism of tuff reverse and fragmentation in this pumped-storage power station has important references for revealing the engineering geological characteristics of the same type of slope.

关 键 词：似层面倒转 岩体破碎 空间分布特征 成因机制 工程地质分析 安徽省宁国抽水蓄能电站 

分 类 号：P642[天文地球—工程地质学]