岩土力学Issue(1)：118-122,129,6.
不同围压下灰岩三轴压缩过程能量分析
Energy analysis of limestone during triaxial compression under different confining pressures
摘要
Abstract
Linear equation between peak stress and Young's modulus with confining pressure is obtained from triaxial compression for limestone under different confining pressures. The relationships between strain energy and strain under three confining pressures are fitted by using stress-strain curve, which can obtain the energy value of limestone in anyone axial strain. Several energy changing equations of several stages in the compression process are analyzed, so as to explain the more several rock failures under higher confining pressure in consideration of the rock sample doing work to hydraulic oil. Based on crack extension degree affects the value of the Young's modulus, the concept of crack development coefficient F is proposed;and the empirical formula to strike F usingunder the three confining pressures is given; and the real rock mechanical parameters of various stages during the limestone compression are got;the plastic platform appearing near the peak intensity under high confining pressure with changing tendency of F is explained.关键词
灰岩/三轴压缩/应变能/岩石破坏/裂缝发展系数Key words
limestone/triaxial compression/strain energy/rock failure/crack development coefficient分类
建筑与水利引用本文复制引用
田勇,俞然刚..不同围压下灰岩三轴压缩过程能量分析[J].岩土力学,2014,(1):118-122,129,6.基金项目
中央高校基本科研业务费专项资金资助(No.12CX06077A)。 （No.12CX06077A）
