Mechanical Initiation and Propagation Mechanism of a Thrust Fault: A Case Study of the Yima Section of the Xiashi-Yima Thrust (North Side of the Eastern Qinling Orogen, China)

Cai, Wu; Li, Dou; He, Junguo; He, Hui; Ding, Yan-lu

doi:10.1007/s00603-014-0666-x

Cited by 22 publications

(12 citation statements)

References 57 publications

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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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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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“…Faults are the most common geological structures in coal mining. e rockburst induced by fault activation belongs to structural instability disaster and has the following characteristics: the large burst amount of coal rock, strong destruction, rapid occurrence, and unclear precursor information [19][20][21][22][23]. In recent years, research on fault rockburst has been widely performed.…”

Section: Introductionmentioning

confidence: 99%

The Mechanical Criterion of Activation and Instability of Normal Fault Induced by the Movement of Key Stratum and Its Disaster‐Causing Mechanism of Rockburst in the Hanging Wall Mining

Pengfei

Jiabin

Wang

et al. 2021

Advances in Civil Engineering

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Coal mine rockburst is closely related to the complex geological structure. Understanding the criterion of the fault activation instability and the disaster-causing mechanism of rockburst under the influence of mining is the theoretical premise and important guarantee of safe and efficient coal mining. In this paper, based on the theory of key stratum, the mechanical model of fault slip instability in the normal fault during the hanging wall mining was established, and the instability criterion was derived. It is concluded that the fault slip instability of the hanging wall is mainly controlled by two factors: (1) the distance between coal seams and key stratum and (2) the distance between working face and fault. Moreover, these two factors have an inverse relation to the occurrence of rockburst. Subsequently, three conceptual models of rockburst induced by the fault stress transfer, stress concentration of coal pillars, and fault structural instability were proposed. Based on the rock mechanics theory, the rockburst carrier system model of “roof-coal seam-floor” near the fault was established. The mechanical essence of fault rockburst was obtained as follows: under the action of fault, the static load of fault coal pillar was increased and superimposed with the fault activation dynamic load, leading to high-strength rockburst disaster. Based on the occurrence mechanism of fault rockburst, the monitoring and prevention concept and technical measures were proposed in three aspects, including the monitoring and control of fault activation dynamic loads, the monitoring of high static load in fault coal pillar and stress release, and the strengthening roadway support. These prevention and control measures were verified in the panel 103down02 of the Baodian Coal Mine in engineering, and the effectiveness of these measures was proved.

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“…In most areas of China, the mine geological conditions are complex, and the geological structure is highly developed. In terms of underground geological structures, faults are the most common structures, and they have a significant impact on the mining design and layout and safety during production, as well as mining panel technology [6][7][8]. ese faults were stable before being affected by mining.…”

Section: Introductionmentioning

confidence: 99%

Study on Overburden Rock Movement and Stress Distribution Characteristics under the Influence of a Normal Fault

Kong

et al. 2020

Advances in Civil Engineering

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Fault activation triggers local deformation and dislocation, releasing a large amount of energy that can easily cause mining disasters, such as rock bursts and roadway instability. To study the changing characteristics of overburden structures and the evolution law of mining-induced stress as panel advances towards a fault from a footwall, two similar models were established, namely, a simulation experimental model and a numerical simulation model. In addition, the relationship among mining, mining stress, and rock bursts induced by fault activation was investigated. The results of this study reveal that when the working face is 30 m away from the fault, the high-position rock mass near the fault turns to the goaf where the fault is activated, and the two walls display relatively obvious dislocation. During the process of footwall panel mining to the fault, the abutment stress of the coal pillar tends to increase initially, followed by a decrease. When the working face is 20 m away from the fault, the abutment stress ahead of the working face reaches its maximum. When the width of the coal pillar is within the range of 10–40 m, the coal pillar accumulates a large amount of energy, and the working face affected by the fault easily induces a rock burst. Before fault activation, disturbances arising from the mining activities destroy the equilibrium stress environment of the rock system surrounding the fault, and the fault continuously accumulates energy. When the accumulated energy reaches a certain threshold, under the action of normal stress or shear stress, the fault will be activated, and a large amount of energy will be released, which can easily induce a rock burst. The research results in this paper provide a scientific basis for the classification, prediction, and prevention of rock bursts under similar geological conditions.

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Mechanical Initiation and Propagation Mechanism of a Thrust Fault: A Case Study of the Yima Section of the Xiashi-Yima Thrust (North Side of the Eastern Qinling Orogen, China)

Cited by 22 publications

References 57 publications

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

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

The Mechanical Criterion of Activation and Instability of Normal Fault Induced by the Movement of Key Stratum and Its Disaster‐Causing Mechanism of Rockburst in the Hanging Wall Mining

Study on Overburden Rock Movement and Stress Distribution Characteristics under the Influence of a Normal Fault

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