Rock burst proneness prediction by acoustic emission test during rock deformation

Zhang, Zhizhen; Gao, Feng; Shang, Xiaoji

doi:10.1007/s11771-014-1950-3

Cited by 46 publications

(20 citation statements)

References 8 publications

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“…The measurement method proposed by Zhang et al [33] stated that the coal rock burst tendency can be characterized by the ratio of the elastic modulus to the softening modulus . Figure 6 shows the complete stressstrain curve of a standard coal specimen (50 mm in diameter and 100 mm in height) under uniaxial compression.…”

Section: Specimensmentioning

confidence: 99%

Nonlinear Dynamics Mechanism of Rock Burst Induced by the Instability of the Layer-Crack Plate Structure in the Coal Wall in Deep Coal Mining

Chen

Mao

et al. 2017

Shock and Vibration

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The instability of layer-crack plate structure in coal wall is one of the causes of rock burst. In the present paper, we investigate the formation and instability processes of layer-crack plate structure in coal wall by experiments and theoretical analysis. The results reveal that layer-crack plate structure formed near the free surface of the coal wall during the loading. During the formation of the layer-crack plate structure, the lateral displacement curve of the coal wall experiences a jagged variation, which suggests the nonlinear instability failure of the coal wall with a sudden release of the elastic energy. Then, a dynamic model for the stability analysis of the layer-crack plate structure was proposed, which takes consideration of the dynamic disturbance factor. Based on the dynamic model, the criterion for dynamic instability of the layer-crack plate structure was determined and demonstrated by an example. According to the analytical results, some control methods of dynamic stability of the layer-crack plate structure was put forward.

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Section: Specimensmentioning

confidence: 99%

Nonlinear Dynamics Mechanism of Rock Burst Induced by the Instability of the Layer-Crack Plate Structure in the Coal Wall in Deep Coal Mining

Chen

Mao

et al. 2017

Shock and Vibration

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“…Based on above research results, the FD of rock fracture mostly reflected the state of uniaxial compression under high temperature and triaxial compression at normal temperature; it is rarely reported in the condition of triaxial compression under high temperature. But in the development of geothermal resources, nuclear waste treatment, underground energy reserves, and other projects, rock is always in the coupling environment of temperature and confining pressure, so the study of deformation and failure mechanism of rock under different temperature and confining pressures has become a hot and frontier issue in the study of rock mechanics [21][22][23][24]. The macroscopic mechanical properties of granite in the experimental temperature (25∼1000 ∘ C) and confining pressure (0∼40 MPa) had been studied in detail in the early stage [25].…”

Section: Advances In Materials Science and Engineeringmentioning

confidence: 99%

Fractal Characteristics of Rock Fracture Surface under Triaxial Compression after High Temperature

Zhang

2016

Advances in Materials Science and Engineering

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Scanning Electron Microscopy (SEM) test on 30 pieces of fractured granite has been researched by using S250MK III SEM under triaxial compression of different temperature (25~1000°C) and confining pressure (0~40 MPa). Research results show that (1) the change of fractal dimension (FD) of rock fracture with temperature is closely related to confining pressure, which can be divided into two categories. In the first category, when confining pressure is in 0~30 MPa, FD fits cubic polynomial fitting curve with temperature, reaching the maximum at 600°C. In the second category, when confining pressure is in 30~40 MPa, FD has volatility with temperature. (2) The FD of rock fracture varies with confining pressure and is also closely related to the temperature, which can be divided into three categories. In the first category, FD has volatility with confining pressure at 25°C, 400°C, and 800°C. In the second category, it increases exponentially at 200°C and 1000°C. In the third category, it decreases exponentially at 600°C. (3) It is found that 600°C is the critical temperature and 30 MPa is the critical confining pressure of granite. The rock transfers from brittle to plastic phase transition when temperature exceeds 600°C and confining pressure exceeds 30 MPa.

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“…In order to understand the mechanism of rockburst more deeply, uniaxial experiments [6][7][8], biaxial experiments [9,10], and true-triaxial unloading experiments were carried out [11][12][13][14][15][16][17][18]. True-triaxial unloading tests can simulate the in situ stress level and reproduce rockburst phenomenon.…”

Section: Introductionmentioning

confidence: 99%

Rockburst in Sandstone Containing Elliptic Holes with Varying Axial Ratios

Wang

Liu

et al. 2019

Advances in Materials Science and Engineering

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Rockburst disaster is one of the prominent problems faced by deep underground engineering. In this study, rockburst in four elliptical holes with different axial ratios in sandstone under biaxial loading is studied as an analogue for underground roadways. Video and acoustic emission (AE) equipment is used to monitor the biaxial loading tests. Experimental results indicate that each of the elliptical holes goes through four stages: quiet period, small particle ejection, spalling, and rockburst. The duration of quiet and spalling periods increased with increasing axial ratio of ellipse. The duration of the ejection and rockburst periods remains unchanged. All the four elliptical holes have V-shaped pits after rockburst occurs. The fragments produced during rockburst are divided into coarse, medium, fine, and micro grains. The quantity of coarse and medium grains increases with increasing axial ratio. The mass ratio of coarse and medium grains increases and that of fine and micro grains decreases. The depth, angle, and area of the V-shaped pits decrease with increasing axis ratio. Tensile cracks play an important role in rockburst failure. Tensile cracks are the dominant crack types formed during rockburst and account for over 70% of all cracks in the samples. The number of tensile cracks increased and the number of shear cracks decreased. This paper has some reference value for practical engineering design and prevention of rockburst.

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Rock burst proneness prediction by acoustic emission test during rock deformation

Cited by 46 publications

References 8 publications

Nonlinear Dynamics Mechanism of Rock Burst Induced by the Instability of the Layer-Crack Plate Structure in the Coal Wall in Deep Coal Mining

Nonlinear Dynamics Mechanism of Rock Burst Induced by the Instability of the Layer-Crack Plate Structure in the Coal Wall in Deep Coal Mining

Fractal Characteristics of Rock Fracture Surface under Triaxial Compression after High Temperature

Rockburst in Sandstone Containing Elliptic Holes with Varying Axial Ratios

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