A Coupled Elastoplastic Damage Dynamic Model for Rock by Xuelong Hu, Ming Zhang, Xiangyang Zhang, Min Tu, Zhiqiang Yin, Haifeng Ma, Minke Duan

“…In this model, unified strength theory is taken as the yield criterion; to reflect the different damage evolution law of rocks under tension and pressure conditions, the effective plastic strain and volumetric plastic strain are used to represent the compressive damage variable and the equivalent plastic strain is used to represent the tensile damage variable; the plastic hardening behavior and strain rate effect of rocks are characterized by piecewise function and dynamic increase factor function, respectively; Fortran language and LS-DYNA User-Defined Interface (Umat) are used to numerically implement the constitutive model; the constitutive model is verified by three classical examples of rock uniaxial and triaxial compression tests, rock uniaxial tensile test, and rock ballistic test. …”
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Second order sliding mode control with proportional integral observer for wing rock by Ahmad Mahmood, Jamshed Iqbal

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Back Analysis of Rock Hydraulic Fracturing by Coupling Numerical Model and Computational Intelligent Technology by Shaojun Li, Hongbo Zhao, Xiating Feng, Quan Jiang, Qiancheng Sun

“…Hydraulic fracturing is widely used to determine in situ stress of rock engineering. In this paper we propose a new method for simultaneously determining the in situ stress and elastic parameters of rock. …”
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Application of Modified Hoek–Brown Strength Criterion in Water-Rich Soft Rock Tunnel by Xianghui Deng, Yuncai Wang, Rui Wang, Daohong Xia, Zhiqing Zhao

“…In accordance with the classical elastic–plastic mechanics theory, the stress, strain, and displacement calculation formulas of the tunnel surrounding rock are derived. …”
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Determination of sedimentation conditions of sandy rocks when calculating boron content from logging data by Ivan S. Khodorov, Igor A. Melnik

“…Determination of sedimentation conditions of sandy reservoir rocks is an important part in the search for new deposits and in effective development of hydrocarbon fields. …”
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Pressure-Shear Crack Initiation and Expansion Mechanism of Complex Cracked Rock Mass under the Seepage Stress by Lu Shen

“…The crack initiation criterion under compressive shear stress state is analyzed by taking the theory of fracture mechanics and classical mechanics. The coupling equation in the extended finite element simulation is established. …”
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Research on Coal-Rock Fracture Image Edge Detection Based on Tikhonov Regularization and Fractional Order Differential Operator by Chunsheng Liu, Chunping Ren

“…Finally, we consider the frequency characteristics and long memory properties of fractional differential, the classical first-order Sobel and second-order Laplacian edge detection algorithms are extended to fractional order pattern, and a new pattern of fractional order differential image edge detection is constructed to realize the coal-rock fracture edge features identification. …”
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A New Evaluation Method of Total Organic Carbon for Shale Source Rock Based on the Effective Medium Conductivity Theory by Jian Fu, Xuesong Li, Yonghe Sun, Qiuli Huo, Ting Gao, Li Fu, Yuchen Liu, Suxing Dong, Haijun Fan

“…The model parameters are determined through the optimization method, and the bisection iteration method is used to solve the model equation. Compared with the classic TOC calculation method, the new model can evaluate the abundance of organic matter in shale and tight sandstone, which provides a new option to assess the TOC of rocks based on logging methods.…”
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Loosening rocks detection at Draa Sfar deep underground mine in Morocco using infrared thermal imaging and image segmentation models by Kaoutar Clero, Said Ed-Diny, Mohammed Achalhi, Mouhamed Cherkaoui, Imad El Harraki, Sanaa El Fkihi, Intissar Benzakour, Tarik Soror, Said Rziki, Hamd Ait Abdelali, Hicham Tagemouati, François Bourzeix

“…Rockfalls are among the frequent hazards in underground mines worldwide, requiring effective methods for detecting unstable rock blocks to ensure miners' and equipment's safety. …”
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Hellenistic and Roman gems and jewellery from south-western Turkey by Lafli, E., Henig, M.

Erosion Effect on Non-Darcy Hydraulic Characteristics of Limestone and Mudstone Mixture by Chong Li, Sifeng He

“…In order to study the water inrush mechanism of faulted rock mass, a series of erosion seepage experiments were carried out to test the non-Darcy hydraulic properties of a limestone and mudstone mixture. …”
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Nanoscale Pore Structure Characterization and Permeability of Mudrocks and Fine-Grained Sandstones in Coal Reservoirs by Scanning Electron Microscopy, Mercury Intrusion Porosimetry... by Na Zhang, Fangfang Zhao, Pingye Guo, Jiabin Li, Weili Gong, Zhibiao Guo, Xiaoming Sun

“…Finally, the applicability of three classic permeability estimation models based on MIP and NMR data to the investigated rock samples was evaluated.…”
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Influences on the Seismic Response of the Gravity Dam-Foundation-Reservoir System with Different Boundary and Input Models by Denghong Chen, Chunping Hou, Feng Wang

“…Dynamic dam-foundation interaction is great important in the design and safety assessment of the dam structures. Two classic boundary conditions, i.e., the viscous-spring boundary and the viscous boundary, are employed to consider the radiation damping of the unbounded rock foundation. …”
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Rocky Start of Dinosaur National Monument (USA), The World's First Dinosaur Geoconservation Site by Kenneth Carpenter

“…The quarry museum at Dinosaur National Monument, which straddles the border between the American states of Colorado and Utah, is the classic geoconservation site where visitors can see real dinosaur bones embedded in rock and protected from the weather by a concrete and glass structure. …”
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Fractal and Morphological Characteristics of Single Marble Particle Crushing in Uniaxial Compression Tests by Yidong Wang, Wenjiao Dan, Yongfu Xu, Yue Xi

“…It is however difficult to study the crushing of rock particles using classical theory because the physical structure of the particles is complex and irregular. …”
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The effect of the intermediate principal stress on pillar strength by Duncan Maina, Heinz Konietzky

“…Abstract Room and pillar mining is an underground mining method that utilizes natural pillar support to control rock mass behavior, ensuring mine stability and a safe mine environment. …”
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Contrary trends of grout consumption and water absorption at Sardasht by Mohammad Hassan Nazari, Ali Aalianvari, Mohamed El Tani

“…Abstract A new interpretation of contrary trends of water absorption rate and cement mix consumption in rock grouting is presented. The classical interpretation is either a higher consumption due to fracturing or a higher absorption due to thin fractures that cannot be grouted. …”
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New Maxwell Creep Model Based on Fractional and Elastic-Plastic Elements by Hao Tang, Dongpo Wang, Zhao Duan

“…The 1D creep equation of the new model was used to fit existing creep data of rock salt, and the 3D creep equation was used to fit the creep data of remolded loess. …”
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Hydraulic Fracturing Breakdown Pressure and Prediction of Maximum Horizontal In Situ Stress by Ali Lakirouhani, Somaie Jolfaei

“…In this model, it is assumed that the rock medium is impermeable and the breakdown occurs at the tip of two radially cracks. …”
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Shear localisation controls the dynamics of earthquakes by Fabian Barras, Nicolas Brantut

“…The propagation dynamics is governed by a balance between elastic stored energy in the surrounding rock, and dissipated energy at the propagating tip of the slipping patch. …”
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