THE INFLUENCE OF MOISTURE CONTENT ON THE ACOUSTIC EMISSION AT THRESHOLD OF ROCK DESTRUCTION

被引：0
|
作者：
Sun, Qiang [1 ,3 ]
Ji, Ming [1 ,2 ]
Xue, Lei [3 ]
Su, Tianming [4 ]
机构：
[1] China Univ Min & Technol, Sch Resources & Earth Sci, Xuzhou 221116, Peoples R China
[2] China Univ Min & Technol, Sch Mines, Xuzhou 221116, Peoples R China
[3] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Shale Gas & Geoengn, Beijing 100029, Peoples R China
[4] Minist Transport, Res Inst Highway, Beijing 100088, Peoples R China
来源：
ACTA GEODYNAMICA ET GEOMATERIALIA | 2015年 / 12卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Acoustic emission; Peak strength; Moisture content; Process of destruction; Stress-strain; INSTABILITY; FRACTURE; FAILURE; DAMAGE;
D O I：
暂无
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Investigations of rocks with different moisture contents demonstrate that during the process of failure, the number of acoustic emissions (AE) increases in the vicinity of the yield point with the rapid generation and growth of micro cracks. The increase of moisture content leads to decreased rock strength and fewer events of AE, which suggests that the inner structure and mechanical properties of the rocks are changed. Moreover, less energy is released during the process of destruction, which exhibits little influence on the stress level at the threshold point of yield. One could use the variation of rock AE to obtain the end stress of rock elastic stage and Poisson's ratio. And the stress ratio at the critical point could be described by mathematical expressions.
引用
收藏
页码：279 / 287
页数：9
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