Rock Mechanics and Rock Engineering
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Papers 2984
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#1Cristobal Javier Manquehual (NTNU: Norwegian University of Science and Technology)H-Index: 1
#2Pål Drevland Jakobsen (NTNU: Norwegian University of Science and Technology)H-Index: 8
Last. Amund Bruland (NTNU: Norwegian University of Science and Technology)H-Index: 16
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For road tunnels in most Nordic countries, temporary rock support installed during tunnel excavation usually becomes a part of the permanent rock support. Rock bolts are the most common rock support measure in road tunnels excavated in hard rock, and their conditions over the period of tunnel operation play a significant role in the safety of these tunnels. The rock bolt types and aggressive environmental conditions considered in this research are focused on those used and observed in Norwegian ...
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#1M. A. Millán (UPM: Technical University of Madrid)H-Index: 5
#2Rubén Galindo (UPM: Technical University of Madrid)H-Index: 8
Last. Ana Alencar (UPM: Technical University of Madrid)H-Index: 1
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Calculation of the bearing capacity of shallow foundations on rock masses is usually addressed either using empirical equations, analytical solutions, or numerical models. While the empirical laws are limited to the particular conditions and local geology of the data and the application of analytical solutions is complex and limited by its simplified assumptions, numerical models offer a reliable solution for the task but require more computational effort. This research presents an artificial ne...
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#1Tao Xu (MOE: Chinese Ministry of Education)H-Index: 25
#2Meng Fu (Northeastern University (China))
Last. Guang-lei Zhou (MOE: Chinese Ministry of Education)H-Index: 5
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A sound understanding of the influence of cyclic loading on mechanical properties of rock is of great importance for the management and optimization of engineering rock mass structures such as nuclear waste repositories and geothermal resources. In the present manuscript, we first performed a series of conventional uniaxial compressive tests and fatigue failure tests (i.e. cyclic loading tests) on sandstone samples from Sichuan Province, China. The experimental results show that the fatigue fail...
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#1Hongfa Ma (SDUST: Shandong University of Science and Technology)
#2Yanqi Song (CUMT: China University of Mining and Technology)
Last. Qing Ma (SDUST: Shandong University of Science and Technology)
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The support system of “the top protection layer and remained pillar” left by gypsum mine easily loses its bearing capacity due to the water-weakening effect, contributing to the geological disasters. In this paper, uniaxial compression tests are carried out to estimate the evolution of mechanical properties with the change of immersion time for gypsum rock. The results show that the uniaxial compressive strength and tensile strength decrease gradually with the increase of immersion time. After t...
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The manifestation of strainbursts is related to the strain energy stored in the rock and how this energy is released and transitioned during unstable dynamic failure. It is of significance to investigate the role of energy evolution and transition during strainbursts and how it is influenced by surrounding rocks. For this purpose, experimental and numerical studies were performed in this study. Composite rock–coal specimens were loaded under the uniaxial compressive condition to produce strainbu...
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#1Mingdong Wei (Sichuan University)H-Index: 15
#2Feng Dai (Sichuan University)H-Index: 34
Last. Zelin Yan (Sichuan University)H-Index: 3
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Understanding the inconsistent rock fracture toughness (KIc) measurement results from different test specimen geometries helps provide suitable fracture parameters for engineering applications, predict rock fracture load, and assess the safety of flawed rock engineering structures. In this study, fracture experiments using full- or half-disc specimens with chevron notches or straight-through notches were conducted. Experimental results show that the notch types and loading methods (Brazilian-typ...
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#1Shayan Maleki (Stantec)
#2Virgilio Fiorotto (UniTS: University of Trieste)H-Index: 12
This paper presents a novel method on the hydraulic brittle fracture propagation in a rock mass forced by high-frequency fluctuating pressures due to the turbulence phenomena that occur in unlined dissipation structures and spillways. This type of brittle fracture analysis allows the risk assessment related to the design of unlined emergency spillways and in pre-excavated plunge pools and stilling basins, with reference to small duration flood events that are larger than the design ones. These p...
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#1Zihao Dou (THU: Tsinghua University)H-Index: 4
#2Tianyang Gao (THU: Tsinghua University)H-Index: 1
Last. Shuang Yi (THU: Tsinghua University)H-Index: 7
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An understanding of shear behavior of fractured rocks subjected to different durations of groundwater immersion is essential for practical rock engineering. Direct shear tests were conducted on fractured granite samples after different immersion durations of 1, 3, 6 and 12 months, and the initially dry granite fracture samples were also tested as reference. The results indicate that the peak shear strength, residual shear strength, shear stiffness and dilation at peak shear stress decreased with...
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#1Zhaofei Chu (WHU: Wuhan University)H-Index: 5
#2Zhijun Wu (WHU: Wuhan University)H-Index: 19
Last. Yuan Zhou (WHU: Wuhan University)H-Index: 1
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Understanding the micromechanical mechanism of the rock creep process is of great importance for studying the macroscopic time-dependent behavior of rocks. In this study, the evolution characteristics of the microstructure (cracks and pores) of saturated sandstones under short term and creep uniaxial compression conditions were investigated with the nuclear magnetic resonance (NMR) technique. The samples were first loaded to different stress levels and creep stages and then completely unloaded f...
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#1Wei Dong (DUT: Dalian University of Technology)H-Index: 10
#2Zhimin Wu (DUT: Dalian University of Technology)H-Index: 6
Last. She Ji (DUT: Dalian University of Technology)
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To study fracture properties and establish a shear–softening constitutive law for rock–concrete interfaces, direct tension, three-point bending, and single shear push-out tests were conducted on composite rock–concrete specimens with different degrees of interface roughness. The relationships between tensile strength (ft), average shear strength (τav), initial fracture toughness (Kini 1C), mode I fracture energy (GIf) and interfacial roughness were determined based on experimental results. A she...
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Top fields of study
Geology
Geotechnical engineering
Materials science
Rock mass classification
Structural engineering
Rock mechanics