— The uniaxial compressive strength (UCS) is an important index for rock classification and rock mass quality evaluation. As one of the indispensable mechanical parameters in rock mass engineering design and stability analysis, UCS had been included in various standards and engineering codes, and its research significance could not be …
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— The uniaxial compressive strength (UCS) of rocks is a vital geomechanical parameter widely used for rock mass classification, stability analysis, and engineering …
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— The uniaxial compressive strength of rock is one of the most significant parameters required for analysis of rock mass, its characterization, and design of foundations. Direct determination of the uniaxial compressive strength of rock is time-consuming, expensive, and requires destructive laboratory or field testing. Therefore, …
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— The strength characteristics of a rock is a criterion for its ability to be drilled and fractured. The uniaxial compressive strength (UCS) is the most commonly used strength index in construction industry and in rock engineering projects. Therefore, a comprehensive knowledge on the factors that could influence the value of the …
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Close behind diabase in compressive strength come other fine-grained igneous rocks like Diorite, Gabbro, and Basalt. Interestingly, the one non-igneous rock in this super strong group is Quartzite. Quick Conversion: 350 MPa is over 50,000 psi!
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— According to the compression testing results, carbonate rocks exhibited more substantial rock resistance than those of sandstone and shale rocks, distinguished by the largest uniaxial compressive strength (being 108.07 MPa), as shown in Fig. 2 a. Among the three kinds of rocks, shale specimens had the smallest compressive strength of 45.62 …
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— The uniaxial compressive strength (UCS) is an important parameter for rock mass classification and rock engineering designs. This study proposes a novel method for predicting the UCS of rocks using X-ray computed tomography and convolutional neural networks. First, X-ray CT scanning was conducted on five mudstone specimens. The …
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— The uniaxial compressive strength of the rocks employed in the present study is assumed as the independent variable in regression analyses and the output of the fuzzy inference system. The uniaxial compressive strength value of the rock samples varies from 6.21 to 160.32 MPa (Table 1).
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— The uniaxial compressive strength (UCS) of rocks is an essential input parameter for engineering design in mining and civil engineering. This research aimed to investigate the relationship between nano-mechanical properties and macroscopic mechanical properties that result from microstructural constituents of rock materials. …
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— The unconfined compressive strength (UCS) of rocks is one of the most significant parameters for stability analysis and design of many rock engineering projects, particularly when the rocks are subjected to compressive stresses with low confining pressure [].There are generally two types of methods for determination of the UCS: (a) …
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— The uniaxial compressive strength of rock is one of the most important mechanical properties of rock and is widely used in rock foundation design, rock mass quality classification, and rock mass engineering stability analysis [1,2].The method of determining the uniaxial compressive strength of rocks by standard laboratory rock …
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— The uniaxial compressive strength (UCS) of rock is an important parameter required for design and analysis of rock structures, and rock mass classification. Uniaxial compression test is the direct method to obtain the UCS values. However, these tests are generally tedious, time-consuming, expensive, and sometimes impossible to perform …
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Brown criterion for estimating the strength and deformability of jointed rock masses, three 'properties' of the rock mass have to be estimated. These are: ξ uniaxial compressive …
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The strongest rock in the world in compression is Diabase, which can stand up to 350 MPa. Diabase is a kind of fine-grained igneous rock. Close behind diabase in compressive strength come other fine-grained …
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— The uniaxial compressive strength (UCS) of rocks is one of the key parameters for evaluating the safety and stability of civil and mining structures. In this study, 386 rock samples containing four properties named the load strength (PLS), the porosity (Pn), the P-wave velocity (Vp), and the Schmidt hardness rebound number (SHR) are …
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— It is also an established fact in the literature that the tensile strength of rock is related to its compressive strength. According to Sheorey (), the compressive strength of rock is ten times higher than its tensile strength.A study by Kahraman et al. shows a linear correlation between UCS and BTS for different rock types.This proposed correlation is in …
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— The uniaxial compressive strength of the rock specimens was tested using a SHT4106 microcomputer-controlled electro-hydraulic servo universal testing machine with a maximum load of 1000 kN, which ...
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— The petrographic characteristics of rocks are the determining factors affecting their mechanical properties. This 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. The quantification of various …
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In this study, 31 empirical equations are summarized that relate unconfined compressive strength and internal friction angle of sedimentary rocks (sandstone, shale, and …
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This test is much more accurate for brittle rocks than ductile rocks. Rocks have a much higher compressive strength than tensile stress, about 8:1 in theory, but in practice it is generally 15:1 to 25:1. The uniaxial compressive strength can be also calculated from:
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Intact Rock • Strength classification is based on strength of the rock (compressive strength & modulus of elasticity; Table 7.2) • 5 strength classes: A-E based on the overall rock …
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— In order to establish an optimal model for reasonably predicting the uniaxial compressive strength (UCS) of rocks, a method based on feature optimization and SSA-XGBoost was proposed. Firstly, the UCS predictor system of rocks, considering petrographic and physical parameters, was determined based on the systematic …
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— For instance, the pressure at which the rock fails in compression determines the compressive strength of a rock. If more force than necessary were immediately delivered, one would only know that the strength of the rock had been exceeded. Yet, rock strength would not be quantifiable. A systematic lead-up to failure is essential for both …
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— The compressive strength of a rock mass can be determined by in situ testing. Such tests are used in civil engineering and involve among others, plate bearing, hydraulic pressure chamber, flat ...
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— The strength of rock under different stress states satisfies the following law: triaxial compressive strength>biaxial compressive strength>uniaxial compressive strength>shear strength>tensile strength. Usually, if the load reaches the instantaneous strength (commonly known as uniaxial compressive strength) of rock, the rock is broken.
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The strength of rocks and soil is a crucial design parameter in engineering projects, and it can be determined through various test methods such as uniaxial compressive strength, tensile strength ...
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— Classifications of intact rock, based on compressive strength and modulus ratio (Young's modulus/compressive strength), developed by and Miller, are given in Tables 2 and 3, respectively. The very high strength category in Table 2 includes rocks like basalt, diabase, and quartzite. Other igneous rocks, limestone, dolomite, and well ...
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— The uniaxial compressive strength (UCS) is classified as one of the basic mechanical properties of rocks, which is widely used in mining and construction practice.
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— Rock engineering tasks like tunnelling, dam and building construction, and rock slope stability rely heavily on properly estimating the rock's uniaxial compressive strength (UCS), a crucial rock geomechanical characteristic. As high-quality specimen are not always possible, scientists often estimate UCS indirectly. The primary objective of …
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— The uniaxial compressive strength and tensile strength of rock are important parameters for rock classification, tunnel engineering and so on (Ozturk and Nasuf 2013; Milne 2007).During excavation in mining and tunnel engineering projects, the surrounding rock may experience tensile failure due to construction impacts; hence, the BTS of rock …
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— The rock uniaxial compressive strength (UCS) is the basic parameter for support designs in underground engineering. In particular, the rock UCS should be obtained rapidly for underground engineering with …
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— Rock tensile strength is one of the critical mechanical properties governing the stability of rock structures, such as tunnels, caverns, and slopes. The tensile strength of rocks is usually ten times lower than the compressive strength (Hoek 1968), making underground openings vulnerable under tensile stress conditions (Diederichs and Kaiser …
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— Uniaxial compressive strength (UCS) of rock is an essential parameter in geotechnical engineering. Point load strength (PLS), P-wave velocity, and Schmidt hammer rebound number (SH) are more easily obtained than UCS and are extensively applied for the indirect estimation of UCS. This study collected 1080 datasets consisting of SH, P …
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