Experimental study on the determination method of σcc,σci and σcd for granite under different confining pressures

被引：4

作者：

Chen S.-W. ^{[1
]}

Yang C.-H. ^{[1
,2
]}

Wang G.-B. ^{[2
]}

Wei X. ^{[1
]}

机构：

[1] College of Resources and Environmental Sciences, Chongqing University, Chongqing

[2] Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan

来源：

Dongbei Daxue Xuebao/Journal of Northeastern University | 2016年 / 37卷 / 12期

关键词：

AE; Crack closure stress; Crack damage strength; Crack initiation strength; Crack volumetric strain model; Moving point regression technique;

D O I：

10.3969/j.issn.1005-3026.2016.12.025

中图分类号：

学科分类号：

摘要：

The determination of the stress thresholds of crack closure (σcc), crack initiation (σci) and crack damage (σcd ) of rock is of great significance for understanding the progressive failure process of rock from high-level radioactive geological waste repository. The Brazilian test and triaxial compression test are performed to determine those stress thresholds. Three methods including moving point regression technique, crack volumetric strain and acoustic emission hits rate are applied to determine these thresholds mentioned above. A comprehensive method is proposed to determine stress thresholds accurately and conveniently. The relationship of various thresholds and corresponding confining pressure are also analyzed, results show that σcc is less sensitive to confining pressure compared with the crack damage stress σcd, the crack initiation strength(σci) meets Griffith strength theory, which is confirmed by the tensile strength from Brazilian test. © 2016, Editorial Department of Journal of Northeastern University. All right reserved.

引用

页码：1789 / 1793and1799

共 9 条

[1]

Martin C.D., The Strength Of Massive Lac Du Bonnet Granite Around Underground Openings, (1994)

[2]

Eberhardt E., Stead D., Stimpson B., Et al., Identifying crack initiation and propagation thresholds in brittle rock, Canadian Geotechnical Journal, 35, 2, pp. 222-233, (1998)

[3]

Chang S.H., Lee C.I., Estimation of cracking and damage mechanisms in rock under triaxial compression by moment tensor analysis of acoustic emission, International Journal of Rock Mechanics and Mining Sciences, 41, 7, pp. 1069-1086, (2004)

[4]

Shiotani T., Ohtsu M., Ikeda K., Detection and evaluation of AE waves due to rock deformation, Construction and Building Materials, 15, 5, pp. 235-246, (2001)

[5]

Cai M., Morioka H., Kaiser P.K., Et al., Back-analysis of rock mass strength parameters using AE monitoring data, International Journal of Rock Mechanics and Mining Sciences, 44, 4, pp. 538-549, (2007)

[6]

Cai M., Kaiser P.K., Martin C.D., Quantification of rock mass damage in underground excavations, International Journal of Rock Mechanics & Mining Sciences, 38, 1, pp. 1135-1145, (2001)

[7]

Wang B., Zhu J.-B., Yan P., Et al., Damage strength determination of marble and its parameters evaluation based on damage control test, Chinese Journal of Rock Mechanics and Engineering, 31, 9, pp. 3967-3973, (2012)

[8]

Zhou H., Meng F.-Z., Lu J.-J., Et al., Discussion on methods for calculating crack initiation strength and crack damage strength for hard rock, Rock and Soil Mechanics, 35, 4, pp. 913-919, (2014)

[9]

Zhao X.-G., Ma L.-K., Su R., Et al., Fracture evolution and strength characteristics of Beishan deep granite under compression conditions, Chinese Journal of Rock Mechanics and Engineering, 33, pp. 3665-3675, (2014)

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