摘要
花岗岩体是很多重要工程地基或围岩的首选。选取高放废物地质处置阿拉善预选区巴彦诺日公花岗岩样品,开展薄片鉴定,获得各花岗岩样品的矿物含量和粒径;通过单轴压缩试验,获得花岗岩的单轴抗压强度。通过对比各组样品矿物含量和粒径与单轴抗压强度,研究二者之间的关系。结果表明:对花岗岩单轴抗压强度影响最大的矿物是钾长石和黑云母,斜长石和石英的影响不明显;矿物粒径与单轴抗压强度的相关性不明显,但与某一结构岩石单轴抗压强度的相关性明显;花岗岩的强度不仅仅取决于组成矿物含量和粒径,对于其内部结构的细节(如微裂隙、矿物排列、胶结等)非常敏感。
Granite is the first choice for many important engineering foundations or surrounding rocks.A variety of granite samples from the Bayannuorigong granite mass in the Alxa pre-selected region for geological disposal of high-level nuclear waste were subjected to petrographic studies.The same samples were then tested to determine the uniaxial compressive strength.The relationships between the uniaxial compressive strength and the mineralogical characteristics are described by simple regression analyses.The results show that the influence of K-feldspar and biotite on the uniaxial compressive strength of the granite is obvious.However,the influence of plagioclase and quartz is not obvious.The correlation between the mineral grain size and the uniaxial compressive strength is not obvious,but it is obviously correlated for the rock with the same structure.The strength of granite depends not only on the mineral compositions and grain size,but also on the details of its internal structure(such as microcracks,mineral arrangement,cementation,etc.).
作者
袁广祥
张路青
曾庆利
李建勇
黄志全
王洪建
邓绪彪
YUAN Guangxiang;ZHANG Luqing;ZENG Qingli;LI Jianyong;HUANG Zhiquan;WANG Hongjian;DENG Xubiao(College of Geosciences and Engineering,North China University of Water Resources and Electric Power, Zhengzhou,Henan 450045,China;Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2018年第5期93-100,共8页
Hydrogeology & Engineering Geology
基金
河南省高等学校青年骨干教师资助计划(2015GGJS-105)
国家自然科学基金项目资助(41402269
U1704243
41741019
51704120
41502267)
关键词
花岗岩
矿物含量
矿物粒径
单轴抗压强度
granite
mineral composition
grain size
uniaxial compressive strength
