Size effect of sandstone after high temperature under uniaxial compression

被引：22

作者：

Su Hai-jian ^{[1
]}

Jing Hong-wen ^{[1
]}

Mao Xian-biao ^{[1
]}

Zhao Hong-hui ^{[1
]}

Yin Qian ^{[1
]}

Wang Chen ^{[2
]}

机构：

[1] China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Peoples R China

[2] China Univ Min & Technol, Sch Mech & Civil Engn, Beijing 100083, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2015年 / 22卷 / 05期

基金：

中国国家自然科学基金;

关键词：

high temperature process; sandstone; size effect; threshold; ROCK; BEHAVIOR;

D O I：

10.1007/s11771-015-2709-1

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Uniaxial compression tests on sandstone samples with five different sizes after high temperature processes were performed in order to investigate the size effect and its evolution. The test results show that the density, longitudinal wave velocity, peak strength, average modulus and secant modulus of sandstone decrease with the increase of temperature, however, peak strain increases gradually. With the increase of ratio of height to diameter, peak strength of sandstone decreases, which has an obvious size effect. A new theoretical model of size effect of sandstone material considering the influence of temperature is put forward, and with the increase of temperature, the size effect is more apparent. The threshold decreases gradually with the increase of temperature, and the deviations of the experimental values and the theoretical values are between 0.44% and 6.06%, which shows quite a credibility of the theoretical model.

引用

页码：1901 / 1908

页数：8

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