Back-analysis of rock mass strength parameters using AE monitoring data

Cai, Ming; Morioka, Hiroshi; Kaiser, Peter K.; Tasaka, Y.; Kurose, H.; Minami, Masayuki; Maejima, T.

doi:10.1016/j.ijrmms.2006.09.012

Cited by 185 publications

(76 citation statements)

References 25 publications

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“…Baud et al [10] studied the relationships between the localization of sandstone stress deformation and the AE evolution and believed that the localization pattern could be discovered 2 Advances in Materials Science and Engineering through AE imaging. Based on the concept of the AE trigger threshold of rock mass, Cai et al [11] proposed a retrieval method of rock strength based on the AE parameters. Zong et al [12] analyzed crack expansion in the damage evolution process of sandstone materials based on the AE activities and established the corresponding damage evolution model.…”

Section: Introductionmentioning

confidence: 99%

Size Effect of Concrete Specimens on the Acoustic Emission Characteristics under Uniaxial Compression Conditions

Wang

Ren

et al. 2017

Advances in Materials Science and Engineering

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Acoustic emission (AE) experiments under uniaxial compression and cyclic loading-unloading compression conditions were performed using different sizes of cubic concrete specimens. The influences of the loading methods and the concrete sizes on the mechanical parameters and the concrete AE activities were analyzed. The loading method was found to have great impact on the deformation, failure, and energy dissipation of concrete materials. With the increase of the material size, the uniaxial compressive strength of the concrete specimens gradually decreased, while the corresponding strain of peak strength increased first and then decreased. The elasticity modulus fluctuated irregularly. Under the uniaxial compression conditions, five AE patterns corresponding to the deformation and failure of the concrete materials were observed. A significant nonlinear relationship was found between the AE and the stress level. The cumulative AE rings at the peak stress showed nonlinear growth with the increase of the concrete size. Based on an established relationship between the cumulative AE rings and the stress level, the necessary conditions for the existence of the quiet AE period were given. Under the uniaxial cyclic loading-unloading compression conditions, the Felicity ratio decreased first and then increased as the stress increased. The research results have some guiding significance to AE-based monitoring of internal stress evolution of coal, rock, and concrete materials and thereby enable assessment of their stability.

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Section: Introductionmentioning

confidence: 99%

Size Effect of Concrete Specimens on the Acoustic Emission Characteristics under Uniaxial Compression Conditions

Wang

Ren

et al. 2017

Advances in Materials Science and Engineering

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“…The variant trends are identical between ringing counting and accumulative energy with acoustic emission experiments of the rock damage process under different confining pressures [6,7]. Acoustic emission events are fewer before yield and gradually become more active during the period of postyield, and then the AE cumulative count and the cumulative number of energy have the singular points obviously in the case of the stress peak [8,9]. The characteristics of AE are analyzed under the unloading confining pressure, and then the failure characteristics and the mechanism of rock burst 2 Shock and Vibration are discussed with the granite unloading confining pressure test on acoustic emission under different loading paths [7,[10][11][12][13].…”

Section: Introductionmentioning

confidence: 86%

Experimental Study on Mechanical and Acoustic Emission Characteristics of Rock Samples under Different Stress Paths

Qin

Sun

Liu

et al. 2018

Shock and Vibration

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A series of tests on characteristics of acoustic emission have been performed on sandstone under uniaxial, conventional, and triaxial conditions and the unloading confining pressure path. The failure mode of rock specimen has been scanned by CT and a threedimensional reconstruction was made. The differences on characteristics of AE, mechanics, and the failure mode of sandstone during the failure process under three paths are studied. The results show that the deformation of rock specimen is bigger, and axial strain and circumferential strain have a deformation platform at peak point of stress under the unloading confining pressure path. Characteristics of AE ringing are significantly affected by the confining pressure and stress path. AE ringing counts peak value, and accumulative ringing on the breaking moment as well as cumulative release energy is higher, which indicates that the rock failure is more violent under the unloading confining pressure path. The failure mode of rock specimen was dominated by shear failure under the conventional triaxial stress path. The tension failure is the main form at a lower initial value of unloading confining pressure, and the shear failure is more prominent at a higher initial value of unloading confining pressure.

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“…Since AE monitoring technology has practical application in the determination of ground stress, tunnel, and slope engineerings [28,29], there are few studies on AE characteristics of granite at high temperature. Granite, as an ideal material for storing high radioactive nuclear waste, has a series of advantages such as low permeability, compactness, and high strength.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Emission and Damage Characteristics of Granite Subjected to High Temperature

Zhang

2018

Advances in Materials Science and Engineering

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Acoustic emission (AE) signals can be detected from rocks under the effect of temperature and loading, which can be used to reflect rock damage evolution process and predict rock fracture. In this paper, uniaxial compression tests of granite at high temperatures from 25°C to 1000°C were carried out, and AE signals were monitored simultaneously. e results indicated that AE ring count rate shows the law of "interval burst" and "relatively calm," which can be explained from the energy point of view. From 25°C to 1000°C, the rock failure mode changes from single splitting failure to multisplitting failure, and then to incomplete shear failure, ideal shear failure, and double shear failure, until complete integral failure. ermal damage (D T ) defined by the elastic modulus shows logistic increase with the rise of temperature. Mechanical damage (D M ) derived by the AE ring count rate can be divided into initial stage, stable stage, accelerated stage, and destructive stage. Total damage (D) increases with the rise of strain, which is corresponding to the stress-strain curve at various temperatures. Using AE data, we can further analyze the mechanism of deformation and fracture of rock, which helps to gather useful data for predicting rock stability at high temperatures.

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Back-analysis of rock mass strength parameters using AE monitoring data

Cited by 185 publications

References 25 publications

Size Effect of Concrete Specimens on the Acoustic Emission Characteristics under Uniaxial Compression Conditions

Size Effect of Concrete Specimens on the Acoustic Emission Characteristics under Uniaxial Compression Conditions

Experimental Study on Mechanical and Acoustic Emission Characteristics of Rock Samples under Different Stress Paths

Acoustic Emission and Damage Characteristics of Granite Subjected to High Temperature

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