Uniaxial Experimental Study of the Deformation Behavior and Energy Evolution of Conjugate Jointed Rock Based on AE and DIC Methods by Jiliang Pan, Xu Wu, Qifeng Guo, Xun Xi, Meifeng Cai

“…Conjugate joint is one of the most common joint forms in natural rock mass, which is produced by different tectonic movements. …”
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Preliminary Study on High-Energy and Low-Energy Microfracture Event Evolution Characteristics in the Development Process of Rock Failure by Guofeng Yu, Guanwen Cheng, Lianchong Li, Chunan Tang, Bo Ren, Yunchun Han

“…The evolution characteristics of high-energy and low-energy microfracture events play an important role in the brittle failure mechanism of rock and reasonable microseismic (MS) monitoring and acoustic emission (AE) monitoring. …”
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Mechanical Mechanism and Propagation Law of Fissure-Tip Cracks of Large-Size Rock Specimens with Two Precut Fissures by Liming Yin, Ming Li, Wenbin Sun, Juntao Chen, Bin Liu, Ziqi Wang

“…The results demonstrate that with the increase of load, the microcracks developed and propagated gradually, during which a number of branch paths were generated from the fissure tips of the specimens; the upper and lower cracks were connected first due to the main crack propagation, forming a sliding surface which caused the failure of the specimens, and the strengths of the specimens also fluctuated according to the different combinations of the fissure dip angles and rock bridge dip angles. In view of acoustic emission (AE), we calculated and obtained the spatial positions of stress peaks in each direction at the fissure tips; through comparison and analysis, the angle corresponding to the negative angle peak of the maximum circumferential tensile stress and the maximum radial tensile stress is basically the same as the angle of the main crack propagation direction generated from the preexisting fissure; it can be inferred that the tensile stress is the main stress inducing crack initiation and specimen failure, which is consistent with the physical characteristics of rock (resistant to compression but not tension). …”
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Failure Mechanism of a Coal-Rock Combined Body with Inclinations of Structural Planes and a Calculation Model for Impact Energy by Yi-Chao Zhao, Ming-Shi Gao, Yong-Liang He, Dong Xu

“…A coal-rock (CR) combined body can be used to simulate structures of coal and rock strata, and its impact-induced failure characteristic conforms more close to engineering practice. …”
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Experimental study on the strengthening mechanism of carbon fiber-reinforced sand powder 3D-printed rock-like materials by Lishuai Jiang, Xin He, Ye Zhao, Pimao Li, Yang Zhao, Zongke Wang, Dingrui Guo, Qi Gu

“…Sand powder 3D printing has proven to be one of the most effective methods for replicating the physical and mechanical properties of natural rock. However, its limitations in the strength and stiffness of the printed materials hinder its potential for hard rock simulation. …”
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Method for weak zones location at the coal-bed – host rock joint relative to the problem of sudden outbursts: theory and laboratory experiment by Larisa A Nazarova, Leonid Nazarov

“… Within the framework of a geomechanical model that describes the deformation of a rock mass during the subhorizontal coal-bed extraction, the mechanism for the formation and implementation of a sudden outburst is substantiated: as working face gets close to the weak zone of coal-bed – host rock joint, areas of tensile stresses arise, which creates the prerequisites for face space spalling and coal loss with methane. …”
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A Method for Predicting the Timing of Mine Earthquakes Based on Deformation Localization States by Chenli Zhu, Linlin Ding, Yimin Song, Yuda Li

“…A predictive model algorithm for forecasting mine earthquake timing was developed based on Saito’s theory, integrating optics, acoustics, and mathematical modeling theories. The “quiet period” was identified as a significant precursor; thus, the model used the initiation of deformation localization to accurately predict rock failure. …”
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Experimental study on impact failure characteristics of deep circular roadway by Shoujian PENG, Yan YANG, Jiang XU, Qingfeng XU, Chaolong QIN, Xiaoli NONG

“…In order to study the impact failure characteristics of deep circular roadway under the condition of disturbance load, based on the self-developed multi-functional physical simulation test system of rock burst, the impact failure test of circular roadway was carried out for large-scale rock-like materials. …”
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Experimental Study on the Fracture Evolution Processof Rock-like Specimens Containing a Closed RoughJoint Based on 3D-Printing Technology by Jiawei Liu, Haijian Su, Hongwen Jing, Chengguo Hu, Qian Yin

“…In order to overcome the disadvantage of traditional joint fabrication method—inability to reproduce the rough surfaces of practical rock joints—3D-printing technology was applied to restructure five kinds of rough joint according to the failure surface formed by the triaxial prepeak unloading test in this study. …”
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Study on compaction characteristics and mechanical model of dry crushing filling material under lateral confinement condition by Youlin Xu, Shaokang Wu, Zhisong Chen, Xukun Wu, Jitao Zhang, Bing Xiao

“…Notably, the internal pressure structure strength is influenced by factors such as maximum particle size D, grading coefficient n, and particle size distribution continuity, rather than solely by the proportion of large particles. The evolution of acoustic emission signals and energy-time curve during waste rock confined axial compression synchronizes with the compaction process. …”
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Fracture behavior of sandstone with partial filling flaw under mixed-mode loading: Three-point bending tests and discrete element method by Dongdong Ma, Yu Wu, Xiao Ma, Xunjian Hu, Wenbao Dong, Decheng Li, Lingyu Li

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Mechanical properties and damage characterization of cracked granite after cyclic temperature action by Xiankai Bao, Lingyu Wang, Guangqin Cui, Jianlong Qiao, Baolong Tian, Shunjia Huang, Lizhi Wang

“…Abstract Due to the unique geographical environment of the plateau, large-scale damage and destruction of fractured surrounding rock often occur during geotechnical engineering construction as a result of high-temperature cycles. …”
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Research on the Identification of Precursor Information of Limestone Rockburst under Triaxial Unloading Conditions by Wenjun Ding, Zonghong Zhou, Jian Liu, Tingkai Hou, Jiaxin Wang, Jin Li, Xin Zhang

“…Based on the energy evolution of limestone and acoustic emission evolution law, this paper takes the limestone unloading energy evolution law and acoustic emission cumulative ringing count, cumulative energy, RA value, acoustic emission information entropy, and acoustic emission damage as precursor discrimination indicators for the occurrence of rock explosion. …”
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Research on the Impact of Different Force Directions on the Mechanical Properties and Damage Evolution Law of Sandstone with Different Hole Diameters by Fukun Xiao, Renhe Li, Le Xing

“…In this research, a uniaxial acoustic emission experiment was conducted on rock samples with different positions and diameters of the hole, and an analysis was made on the impact of different hole positions and diameters on the mechanical properties, failure, energy conversion, and acoustic emission-caused damage characteristics and laws of the rock samples. …”
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Effect of Water Content on the Impact Propensity of White Sandstone by Jiankui Bai, Chuanming Li, Ruimin Feng, Nan Liu, Xiang Gao, Zhengrong Zhang, Bochao Nie

“…In this paper, uniaxial compression test, cyclic loading and unloading test, and acoustic emission test were conducted on white sandstone using RMT-150B rock mechanics test system and DS5 acoustic emission test system. …”
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Ultrasonic Spectrum Analysis of Granite Damage Evolution Based on Dry-Coupled Ultrasonic Monitoring Technology by Yang Liu, Lan Qiao, Yuan Li, Guodong Ma, Andrei M. Golosov

“…The self-developed dry-coupled rock ultrasonic monitoring system is adopted to set up a multidirectional and multiwaveform ultrasonic monitoring network, which aims to analyse the evolution law of acoustic spectrum parameters in the process of granite loading failure under uniaxial compression, to explore the dominant acoustic spectrum characteristic information at different stages of granite loading, and to verify in situ the damage monitoring of time-effect deformation. …”
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Study on Energy Consumption Characteristics of Different Tools under Impact Load by Fujun Zhao, Haifan Wang, Zhouyuan Ye, Yonghong Liu, Yu Li

“…In the test, the incident energy, absorbed energy, and cumulative energy values of acoustic emission during the process of rock breaking were collected, and energy utilization efficiency was used as a measure of the energy consumption characteristics for three different tools breaking rock. …”
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Study on Microscopic Characteristics of Spatial Distribution of Fractures in Deteriorated Sandstone by Wenwu Zhong, Xin Zhang, Tao Li, Xin Yang, Wei Deng, Jianchao Shi

“…Based on the propagation law of elastic waves in discontinuous media, the application of acoustic emission detection technology can quickly determine whether there are primary fractures in the rock and predict its approximate location. …”
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The Ultrasonic P-Wave Velocity-Stress Relationship and Energy Evolution of Sandstone under Uniaxial Loading-Unloading Conditions by Long Zhang, Zetian Zhang, Ru Zhang, Mingzhong Gao, Jing Xie

“…During mining, a deep rock mass experiences complex mining-induced stress evolution, damage accumulation, and deformation failure processes, and the mechanical and acoustic properties of the rock constantly change. …”
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Experimental and Numerical Studies on the Mechanical Properties of Columnar Jointed Basalt by Shiyi Zhu, Changdi He, Fei Peng, Anchi Shi, Dongyang Yuan, Weikang Zhang

“…In this paper, field research studies, such as the rigid bearing plate tests and acoustic tests, were employed, to obtain the deformation modulus and the acoustic velocity of columnar jointed basalts, and the formula expressed by deformation modulus and acoustic velocity was then established, which would be a useful guidance for the site operation. …”
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