Some microstructural aspects of strength variation in rocks

被引：253
|
作者：
Prikryl, R [1 ]
机构：
[1] Charles Univ Prague, Inst Geochem Mineral & Mineral Resources, Fac Sci, Prague 12843 2, Czech Republic
来源：
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES | 2001年 / 38卷 / 05期
关键词：
D O I：
10.1016/S1365-1609(01)00031-4
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
The experimental study of rock strength revealed a remarkable mechanical variation in closely related rocks. This variation is explained through a quantitative analysis of microstructures. The oriented dry rock specimens were loaded at a constant stress rate and the uniaxial compressive strength with deformation. was recorded together. Microstructures were analysed in thin sections using petrographic image analysis. making it possible to determine size, shape and the shape-preferred orientation of individual grains, grain size distribution and modal composition. The typical grain size has been found to be the main microstructural factor controlling strength variation in groups of rocks which are closely related mineralogically. The increase of strength anisotropy is connected with an increasing degree of shape-preferred orientation of rock-forming minerals. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：671 / 682
页数：12
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