To reveal the weakening effect of the laser on the compressive strength of rocks, standard uniaxial compression tests were carried out on irradiated rocks using a uniaxial compression testing machine.
Details2.1 Specimen Characterization. The granite specimens used in this experimental study were collected from Fangshan District in Beijing, China. The granite specimens were gray, with an average density of 2.72 g/cm 3 and an average longitudinal wave velocity of approximately 4800 m/s. The mineral composition of the specimens was 38% quartz, …
DetailsIn general, compared to intact rock, a rock mass has reduced tensile strength (almost zero), and reduced shear strength especially along discontinuity planes. Furthermore, if a rock mass is cut by directional joint sets, the rock mass strength is anisotropic.
DetailsIn the construction processes of underground or mining engineering, the strength and deformation characteristics of rock masses are critical, and are usually described by the elastic modulus and uniaxial compressive strength (UCS) of rocks (Aladejare 2020).These parameters are vital for the engineering design, stability …
DetailsWith the utilization of a dynamic crack growth criterion, the growth of the sliding crack array is studied and the simulated strengths of a granite under dynamic compression are correspondingly obtained.
DetailsTo investigate the tensile behavior of rock from the perspective of energy, uniaxial tension tests (UTTs) and uniaxial compression tests (UCTs) were carried out on three typical rocks (granite, sandstone and marble). Different unloading points were set before the peak stress to separate elastic energy and dissipated energy.
DetailsTriaxial cyclic loading-unloading tests on Beishan granite from deep underground were conducted using the rock mechanical test system MTS815 to investigate the variation of strength parameters of ...
DetailsStrength degradation mechanisms of granite with different cooling media were discussed from the perspective of heat transfer,and quantitative classification of thermal damage capacity is made according to the thermal shock factor.
DetailsTo study the effect of cryogenic nitrogen freezing on rock strength and mechanical parameters, different types of rock are selected, such as marble, sandstone and granite with different moisture states (dry and saturated), to freeze them with cryogenic nitrogen, and then to determine tensile strength and uniaxial compressive strength of these ...
DetailsUnderstanding the strength characteristics and deformation behaviour of the tunnel surrounding rock in a fault zone is significant for tunnel stability evaluation. In this study, a series of unconfined compression tests were conducted to investigate the mechanical characteristics and failure behaviour of completely weathered granite …
DetailsDynamic impact compression characteristics of granite rocks with different length-diameter ratios: ZHAO Guangming1,2,ZHOU Jun1,2,MENG Xiangrui1,2,KAO Siming1,2,ZHANG Ruofei1,2,HUANG Shunjie1,2 ... Sponsored by : Chinese Society for Rock Mechanics and Engineering ...
DetailsRapid water quenching of high-temperature rocks induces thermal "compression-tension" stress, leading to increased damage and macroscopic cracks, which diminish the rock's mechanical ...
DetailsThe heterogeneity imposed by crystalline rocks such as granite has been found to have a significant effect on the strength and deformation responses and the associated microcracking behavior of ...
DetailsExperimental Investigation on Compressive Strength, Ultrasonic Characteristic and Cracks Distribution of Granite Rock Irradiated by a Moving Laser Beam ... Xuzhou 221116, China. 2 Faculty of ...
DetailsFor example, Lee and Jeon studied two kinds of jointed rock masses and found that the compressive strength increases with α in the range of 0–90°, and the strength of granite with a joint angle of 90° is 1.34 and 1.63 times that with a joint angle of 0°, respectively; Zhang and Wong, Zhang et al. and Zhu et al. showed that the ...
DetailsUsing experimental studies that combine traditional laboratory compressive strength tests with advanced petrographic image analysis and acoustic emission (AE), researchers were able to investigate the effect, and determine the impact of mineralogical compositions and morphologies on the mechanical strength of the rocks (Eberhardt et …
DetailsAbstract In the context of China's deep geological disposal program for high-level radioactive waste, the short- and long-term mechanical behaviors of the host rock, Beishan granite, are investigated experimentally and numerically. Conventional triaxial compression tests and multi-stage creep tests with different confining pressures are …
DetailsExperimental investigations of compressive strength and thermal damage capacity characterization of granite under different cooling modes: XI Baoping1,2,WU Yangchun1,ZHAO Yangsheng1,2,WANG Lei3,ZHANG Baoping3,NIU Xinming3#br# (1. College of Mining Engineering,Taiyuan University of Technology,Taiyuan,Shanxi …
DetailsPDF | On Apr 24, 2019, S. Ranjbar and others published Determination of Uniaxial Compressive Strength of Granite Rock Samples using Electrical Resistivity Measurement: NDT | Find, read and cite ...
DetailsThis study aims to intensively assess the effect degree of petrographic characteristics of granitic rocks on their uniaxial compressive strength (UCS) and determine the dominant factors affecting the UCS.
DetailsIn 2019, during the drilling construction in Shunbei Oilfield, the drilling rig encountered igneous rock with compressive strength up to 195 MPa.
DetailsThe Tibetan Plateau is susceptible to large-scale long-runout landslides during freeze-thaw cycles. The Luanshibao (LSB) long-runout landslide in Litang County, China, serves as a notable example. This study investigates the granite mechanical properties under freeze-thaw cycles effects in the LSB landslide initiation zone, by the …
DetailsThe Unconfined Compression Test is a laboratory test used to derive the Unconfirmed Compressive Strength (UCS) of a rock specimen. Unconfirmed Compressive Str... The International Information Center for Geotechnical Engineers ... Uniaxial Compressive Strength (MPa) Granite. 100-250. Diorite. 150-300. Diabase. 100-350. Gabbro. 150 …
DetailsKnowledge of the strength and elastic modulus of a reservoir rock is important for the optimisation of a particular geothermal resource. The reservoir rock for many geothermal projects in the Upper Rhine Graben, such as those at Soultz-sous-Forêts and Rittershoffen (both France), is porphyritic granite. High fracture densities (up to ~ …
DetailsThis note reports the results of a series of biaxial compressive tests of granite cubes of sizes of 75, ... underestimate the biaxial rock strength, largely because they ignore the effect of the intermediate principal stress. ... Proceedings of the international young scholar symposium on rock mechanics—2008. Beijing, China: Taylor & Francis ...
DetailsThe heterogeneity imposed by crystalline rocks such as granite has been found to have a significant effect on the strength and deformation responses and the associated microcracking behavior...
DetailsCompression and Tension Strength of common Materials; Material Compression Strength - σ - Tension Strength - σ - psi MPa psi MPa; Bricks, hard: 12000: 80: 400: 2.8: Bricks, light
DetailsThe compressive strength of a rock is the maximum stress that it can withstand before it fails when subjected to a compressive load. Compressive strength is an important property of rocks in many engineering applications, such as the design of foundations, dams, and tunnels. ... Granite: 36 - 372: Granodiorite: 147: Gypsum: 6.86: Labradorite ...
DetailsEfficient fracturing is the key issue for the exploitation of geothermal energy in a Hot Dry Rock reservoir. By using the laser irradiation cracking method, this study investigates the changes in uniaxial compressive strength, ultrasonic characteristics and crack distributions of granite specimens by applying a laser beam under various …
DetailsThe Effect of Laser Irradiation on the Compressive Strength of Granite ... Jinan 250061, Shandong, People's Republic of China 4 Shandong Hi-Speed Group Co., Ltd, Jinan 250098, Shandong, People's Republic of China ... the compressive strength of rocks, standard uniaxial compres-sion tests were conducted on Shenyang ultra-hard granite, …
DetailsPE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
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