1. Introduction. Uniaxial compressive strength (UCS) is one of the most widely used rock mechanical parameters in rock engineering like design and construction of foundations, tunneling, slope stability investigations, etc. UCS is also the only parameter to assess rock material strength in Rock Mass Rating (RMR) proposed by Bieniawski …
DetailsDOI: 10.1016/j.ijmst.2020.06.008 Corpus ID: 225572953; Comparative evaluation of different statistical tools for the prediction of uniaxial compressive strength of rocks @article{Teymen2020ComparativeEO, title={Comparative evaluation of different statistical tools for the prediction of uniaxial compressive strength of rocks}, author={Ahmet …
DetailsThe uniaxial compressive strength (UCS) is one of the important geo-mechanical variables of the intact rock that is used to assess the quality of rocks in civil and mining engineering excavations like tunneling, open pit and underground mining, underground space, and rock-cutting by tunnel boring machine or roadheader.Point …
DetailsHence our analysis suggests that an empirical correlation between a seismic wave speed and the uniaxial compressive strength in a suite of rock may exist only if the values of the average crack length, fracture toughness and friction are such that values of the parameter K C / (1 + μ 2 − μ) π c are comparable. Systematic measurements are ...
DetailsThe 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 …
DetailsFigure 3 displays the compressive strength of red bed soft rock material at different strain rates. In the range of strain rate from 37 to 102 s −1, dynamic compressive strength increases linearly with the increase in strain rate. When the strain rate reaches 96 s −1, the compressive strength increases to 4.63 times of 37 s −1.
DetailsThe uniaxial compressive strength (UCS) has been used widely for drilling optimization and ROP prediction for a long time before some drill-bit experts realized that the use of UCS is somewhat problematic because the apparent strength of the rock in the downhole is apparently different from Ref. UCS [6], [11], [12], [13]. Some researchers ...
DetailsLi et al. 13,14,15 conducted uniaxial compression tests on sandstones with different water content to analyse the laws and mechanisms of water influence on the strength, energy evolution and AE ...
DetailsPoint load tests on rocks with a uniaxial compressive strength below 25 MPa are likely to yield highly . ambiguous results. Table 3: Values of the constant . m. i. for intact rock, by rock group. Note that values in . parenthesis are estimates. Rock mass properties 7. Rock typeClass. Group Texture Coarse. Medium;
DetailsRock 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 …
DetailsVarious authors have compiled the values of the unconfined compressive strength for different rock types (Balmer, 1953; Johnson and DeGraff, 1988; Hatheway and Kiersch, 1989; Goodman, 1989; etc..).
Details• 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 strength; A = …
DetailsFor a successful solution of different problems in rock engineering, two important mechanical parameters, namely, uniaxial compressive strength (σ c) and elastic modulus of rock (E) should be estimated correctly.It is well known that the elastic modulus increases with increasing uniaxial compressive strength; and there are different …
DetailsThe uniaxial compressive strength (UCS) of rocks is a vital geomechanical parameter widely used for rock mass classification, stability analysis, and engineering design in …
DetailsUnconfined compressive strength (UCS) of rocks is a crucial parameter in designing geotechnical structures. ... The correlation equations for predicting compressive strength using different ...
DetailsThe tables show that regression equations using physical properties to estimate UCS for the three types of rock (i.e., igneous, sedimentary, and metamorphic rocks) are numerous …
DetailsVarious rock types—including highly deformed to undeformed quartzites, granites, granitic gneisses, gneisses, metabasics (meta-amphibolites and meta-dolerite), and dolomites—collected from different formations of the Lesser and Higher Himalayas were tested to evaluate correlations between the uniaxial compressive strength (UCS) …
Details1. Introduction. The determination of basic mechanical properties of rocks is crucial to a specific engineering project. Several mechanical properties, including uniaxial compressive strength (UCS), have become widely accepted parameters for rock design projects (Baskerville, 1987).From past to present, direct and indirect methods have been …
DetailsThe compressive strength of the rock sample can be evaluated from Equation ... Tensile strength is also used as a measurement of rock strength in many cases. The different correlations for estimating the unconfined compressive and tensile strengths of intact rocks and rock masses are presented in Sections 7.2 and 7.4, respectively. Since …
DetailsEffect of grain size and texture. In granular rocks, grain size also influences strength. For constant porosity, mineralogy, and texture, a smaller grain size means greater strength. …
DetailsThe 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 …
DetailsUniaxial compressive strength (UCS) is a critical parameter in the disaster prevention of engineering projects, requiring a large budget and a long time to estimate in different rocks or the early stage of a project. If predicted accurately, the UCS of rocks significantly affects geotechnical applications. This paper develops a dataset of 734 …
DetailsPropose stacking models to estimate uniaxial compressive strength in different rocks and verify their application. Abstract. 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 …
DetailsExplore a comprehensive table of compressive strength values for different rocks in both SI (MPa) and US customary (psi) units.
DetailsThe uniaxial compressive strength (UCS) of rock is one of the key parameters determining the mechanical behavior and failure characteristics of rocks ... Application of soft computing methods in predicting uniaxial compressive strength of the volcanic rocks with different weathering degree. Arabian J. Geosci., 13 (2020), p. 288. …
DetailsThis study investigated the uniaxial compressive strength of stratified rock mass with different strength ratios of the original materials. The experimental results reveal the relationship between the strength difference of lithological units, the percentage of soft rock and uniaxial compressive strength in the soft and hard rocks alternate ...
DetailsThe uniaxial compressive strength (UCS) of the rock is one of the most important rock properties in geotechnical and mining engineering. UCS of rock is the one essential parameter used for the characterization of the rock mass in various systems such as rock mass rating (RMR), Q-system, and Hoek–Brown failure criterion [].UCS is …
DetailsIn this study, 31 empirical equations are summarized that relate unconfined compressive strength and internal friction angle of sedimentary rocks (sandstone, shale, and …
DetailsUniaxial compressive strength (UCS) of rock material is very important parameter for rock engineering applications such as rock mass classification, numerical modelling bearing capacity, mechanical excavation, slope stability and supporting with respect to the engineering behaviors' of rock. UCS is obtained directly or can be …
DetailsThe uniaxial compressive strength (UCS) is classified as one of the basic mechanical properties of rocks, which is widely used in mining and construction practice.
DetailsUnconfined compressive strength (UCS) of rocks is one of the most important parameters in rock engineering, engineering geology, and mining projects. In the laboratory determination of UCS, high-quality samples are necessary; in which preparing of core samples has several limits, as it is difficult, expensive, and time-consuming. For …
DetailsTo study the influence of control mode and loading rate on mechanical property of rock, uniaxial compression tests of four types of rocks (gray sandstone, red sandstone, mudstone and granite) are ...
DetailsThe 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 …
DetailsThe point load index test is a popular indirect test method for predicting the uniaxial compressive strength of rocks.
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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