Acoustic emission/microseismic source location analysis for a limestone mine exhibiting high horizontal stresses

Wang, Hongliang; Ge, Mao Chen

doi:10.1016/j.ijrmms.2007.08.009

Cited by 89 publications

(31 citation statements)

References 2 publications

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“…With the rapid development and application of MS monitoring techniques, many achievements have been made regarding our understanding of rock slopes (Lynch et al, 2005;Xu et al, 2011bXu et al, , 2012aXu et al, , 2014a, underground mining (Ge, 2005;Wang and Ge, 2008;Lesniak and Isakow, 2009;Kaiser et al, 2009;Trifu and Shumila, 2010;Young et al, 2004;Liu et al, 2013;Hudyma and Potvin, 2010;Lu et al, 2013), deep tunnels (Cai et al, 2001;Tang et al, 2011;Hirata et al, 2007;Feng et al, 2012) and the generation of electricity by hot dry rocks (Tezuka and Niitsuma, 2000). For example, Lynch et al (2005) investigated the engineering application of MS monitoring technique in two case studies and showed that the surface movements inferred from the MS data were spatially correlated with the actual surface movements.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Microseismic monitoring and stability evaluation for the large scale underground caverns at the Houziyan hydropower station in Southwest China

Dai

et al. 2015

Engineering Geology

109

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Section: Accepted Manuscriptmentioning

confidence: 99%

Microseismic monitoring and stability evaluation for the large scale underground caverns at the Houziyan hydropower station in Southwest China

Dai

et al. 2015

Engineering Geology

109

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“…Microseismic activity is essentially a process of the continuous accumulation and intermittent release of stress [19,20]. Within the larger scope of engineering standards, the generation and expansion of rock fractures are accompanied by the rapid release and propagation of elastic waves within the surrounding rock mass [21,22], those elastic waves propagating through the rock are received by the velocity sensors of different positions, and the microseismic events are located by the time difference of propagation [23,24].…”

Section: Microseismic Monitoring Principlementioning

confidence: 99%

Research on the Law of Large-Scale Deformation and Failure of Soft Rock Based on Microseismic Monitoring

Chen

Tang

et al. 2018

Advances in Civil Engineering

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Based on the existing Canadian ESG microseismic monitoring system, a mobile microseismic monitoring system for a soft rock tunnel has been successfully constructed through continuous exploration and improvement to study the large-scale nucleation and development of microfractures in the soft rock of the Yangshan Tunnel. All-weather, continuous real-time monitoring is conducted while the tunnel is excavated through drilling and blasting, and the waveform characteristics of microseismic events are analysed. rough the recorded microseismic monitoring data, the variation characteristics of various parameters (e.g., the temporal, spatial, and magnitude distributions of the microseismic events, the frequency of microseismic events, and the microseismic event density and energy) are separately studied during the process of large-scale deformation instability and failure of the soft rock tunnel. e relationship between the deterioration of the rock mass and the microseismic activity during this failure process is consequently discussed. e research results show that a microseismic monitoring system can be used to detect precursors; namely, the microseismic event frequency and energy both will appear "lull" and "active" periods during the whole failure process of soft rock tunnel. Two peaks are observed during the evolution of failure. When the second peak occurs, it is accompanied by the destruction of the surrounding rock. e extent and strength of the damage within the surrounding rock can be delineated by the spatial, temporal, and magnitude distributions of the microseismic events and a microseismic event density nephogram. e results of microseismic analysis confirm that a microseismic monitoring system can be used to monitor the largescale deformation and failure processes of a soft rock tunnel and provide early warning for on-site construction workers to ensure the smooth development of the project.

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“…To better understand the factors contributing to the dynamic evolution of rock energy, where fracture deformation and extension may be important, monitoring and imaging via acoustic emission may provide important constraint [23][24][25][26][27][28][29], examining the e ect of a change of loading rate on the evolution of microcracking through acquisition, analysis, and processing the acoustic emission signals. He et al [30] performed single-face dynamic unloading tests under the true-triaxial condition using the AE monitoring technique and obtained the relationship of frequency-amplitude of AE signals in rock burst stages.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Energy Mechanism and Acoustic Emission Characteristics of Mudstone with Different Moisture Contents

Jiang

2018

Shock and Vibration

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Characteristics of energy accumulation, evolution, and dissipation in conventional triaxial compression of mudstones with different moisture contents were explored. Stress-strain relations and acoustic emission (AE) characteristics of the deformation and failure of rock specimens were analyzed. e densities and rates of stored energy, elastic energy, and dissipated energy under different confining pressures were confirmed. e results demonstrated that the growth rate of absorbed total energy decreases with the increase of moisture content, indicating that the higher the moisture content is, the less the total energy mudstone samples absorb. e dissipated energy of the soaking sample, by contrast, has the first increase speed, and natural sample comes second at the beginning. When entering the crack stable development stage, the dry sample has the fastest growing rate of dissipated energy, meaning that dissipated energy used for crack propagation gradually decreases with the increase of moisture content. e AE signals significantly enhance at the initial compression stage and plastic deformation stage with the moisture content decreasing. e AE location events at the failure moment decrease as the moisture content increasing. e time that the maximum AE even rate appears is slightly lagged behind the macroscopic failure time, and the AE even rates increase with the decrease of confining pressure. e above results indicate that the water erosion process on rock reduces the cohesive energy and cohesive force, destroys the micromechanical structure, and minimizes the energy states of rock.

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Acoustic emission/microseismic source location analysis for a limestone mine exhibiting high horizontal stresses

Cited by 89 publications

References 2 publications

Microseismic monitoring and stability evaluation for the large scale underground caverns at the Houziyan hydropower station in Southwest China

Microseismic monitoring and stability evaluation for the large scale underground caverns at the Houziyan hydropower station in Southwest China

Research on the Law of Large-Scale Deformation and Failure of Soft Rock Based on Microseismic Monitoring

Investigation of Energy Mechanism and Acoustic Emission Characteristics of Mudstone with Different Moisture Contents

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