Fractal behaviour of the microseismic energy associated with immediate rockbursts in deep, hard rock tunnels

Feng, Xia‐Ting; Yu, Yang; Feng, Guang-Liang; Xiao, Yuzhou; Chen, Bingrui; Jiang, Quan

doi:10.1016/j.tust.2015.10.002

Cited by 114 publications

(37 citation statements)

References 16 publications

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“…Zhao et al [210] applied microseismic monitoring data to comparatively study the microseismic characteristics and rockburst risk of deep tunnel excavated by TBM-drilling and blasting method. Feng et al [211] proposed a fractal calculation method to study the self-similarity of the energy distribution of microseismic events during the development of immediate rockbursts. ese methods are effective and have a great reference value for the study of rockmass dynamic stability.…”

Section: Some Comprehensive Analysis Methods Based On Statistical Thementioning

confidence: 99%

Dynamic Stability Analysis of Rockmass: A Review

Dong

Wang

et al. 2018

Advances in Civil Engineering

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ere are a series of human or natural activities, including earthquakes, explosions, and rockbursts, which have caused a number of safety accidents in geotechnical engineering. is review paper summarized the theories and methods for dynamic stability analysis of rockmass. First, numerical simulation methods, including finite element method (FEM), discrete element method (DEM), finite difference method (FDM), boundary element method (BEM), discontinuous deformation analysis method (DDA), and numerical manifold method (NMM), are summarized. Second, the laboratory experiments, containing shaking table test, split-Hopkinson pressure bar test (SHPB), improved true-triaxial test, dynamic centrifugal model test, acoustic emission (AE) technique, and dynamic infrared monitoring, are considered. ird, the in situ tests including microseismic (MS) technique, velocity tomography, stress-strain monitoring, and electromagnetic radiation monitoring are considered. Finally, some comprehensive analysis methods based on statistical theories are also provided. It is pointed out that the study foundation for the dynamic stability of rockmass is weak to explain the mechanism. So, a set of general comprehensive theories integrating the different methods, including theoretical analysis, numerical methods, laboratory experiments, and in situ tests, should be completely established. is is the most effective way for further investigation.

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Section: Some Comprehensive Analysis Methods Based On Statistical Thementioning

confidence: 99%

Dynamic Stability Analysis of Rockmass: A Review

Dong

Wang

et al. 2018

Advances in Civil Engineering

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“…Microseismic (MS) monitoring techniques have been successfully used to accurately and effectively monitor the micro-cracks within surrounding rock masses in many engineering projects (e.g., Hong et al, 2006;Kaiser, 2009;Tang et al, 2011;Xu et al, 2011;Ma et al, 2013;Cai et al, 2015;Feng et al, 2015Feng et al, , 2016. In this study, an advanced Microseismic Monitoring System (Engineering Seismology Group, Canada) is applied, which consists of microseismic sensors installed in rock masses, a Paladin data acquisition system and a data analysis center.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Stability analysis of underground oil storage caverns by an integrated numerical and microseismic monitoring approach

Tang

Wang

et al. 2016

Tunnelling and Underground Space Technology

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a b s t r a c tUnderground storage in unlined caverns is of great significance for storing energy resources. Construction of underground storage caverns is an extremely complex process, involving extensive multi-bench excavation and strong unloading. Excavation-induced damage of surrounding rock masses may lead to instability of underground storage caverns. The aim of this paper is to put forward a method by integrating numerical simulation and microseismic monitoring for evaluation of cavern stability. A novel numerical method called Continuous-Discontinuous Element Method (CDEM) is applied to simulate micro-cracks under excavation-induced unloading conditions. Meanwhile, a microseismic (MS) monitoring system is employed to monitor real-time MS events during construction of storage caverns. Numerical results are validated using the monitoring data from the MS monitoring system. The integrated method is proved to be successful in capturing micro-cracks in underground storage caverns. Local instability, potential unstable zones and micro-crack evolution are analyzed, and cracking mechanisms are also discussed.

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“…At present, the maximum depth of the civil tunnel has exceeded 2500 m. The increasing number of long, large and deep buried tunnels has brought great challenges to the construction and operation of projects [6][7][8][9][10][11][12]. However, rockburst is a common problem in the construction of deep tunnels, which occurred widely in Australia [13], Canada [14], South Africa [15,16], China [17][18][19] and other countries [20][21][22]. The characteristics of rocks, the magnitude of geositu stress, and the shape of underground engineering will make the phenomena of rockburst different [23,24].…”

Section: Introductionmentioning

confidence: 99%

The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel

et al. 2019

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Rockburst hazards induced by high geostress are particularly prominent during the construction of underground engineering. Prevention and control of rockburst is still a global challenge in the field of geotechnical engineering, which is of great significance. Based on the tunnel group of the Jinping II hydropower station of China, this paper analyzed the mechanical principle of support in the process of construction, and discussed in detail the active release and passive support by numerical simulation and field application. The results show that as two active measures, stress relieve holes and advanced stress relief blasting can release the energy of the microseismic source and transfer the high stress to the deeper surrounding rock, make the surface rock wall with a relatively low stress act as a protective barrier. Their stress release rate is about 12% and 33% in this project, respectively. In term of passive measure, the combined rapid support, which is mainly composed of water swelling anchor and nano-admixture shotcrete, is also an effective way to prevent and control the rockburst under high geostress.

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Fractal behaviour of the microseismic energy associated with immediate rockbursts in deep, hard rock tunnels

Cited by 114 publications

References 16 publications

Dynamic Stability Analysis of Rockmass: A Review

Dynamic Stability Analysis of Rockmass: A Review

Stability analysis of underground oil storage caverns by an integrated numerical and microseismic monitoring approach

The Prevention and Control Mechanism of Rockburst Hazards and Its Application in the Construction of a Deeply Buried Tunnel

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