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In engineering practices, it is critical and necessary to either measure or estimate the uniaxial compressive strength (UCS) of the rock. Measuring the UCS of rocks requires comprehensive...
Uniaxial compressive strength is one of the most important mechanical characteristics of rocks, and its prediction is essential in most rock engineering projects. Recently, several types of research have been conducted regarding the relationship between the petrophysical and geomechanical properties of rocks and geophysical …
In engineering practices, it is critical and necessary to either measure or estimate the uniaxial compressive strength (UCS) of the rock. Measuring the UCS of rocks requires comprehensive studies in the eld and in the laboratory for the rock block sampling, coring and testing. These studies are time-consuming, expensive and go …
Uniaxial compressive strength (UCS) is a key physical test relevant to iron ore crusher design and rock geomechanics for mining. Tests are typically performed on intact lengths …
The uniaxial compressive strength (UCS) of the rock is one of the most important design parameters in various engineering applications. Therefore, the UCS requires to be either preciously measured ...
The point load test (PLT) has been considered a flexible approach to estimate the uniaxial compressive strength (UCS) of rocks. Previously, empirical equations …
The Schmidt hammer is a simple, non–destructive and inexpensive test originally developed in the late 1940s for the testing of concrete hardness (Schmidt 1951), and since the early 1960s, it has been used to estimate the uniaxial compressive strength (UCS) of rock ( and Miller 1966; Cargill and Shakoor 1990).It has been increasingly …
Automatic device for determining the uniaxial compressive strength of sampled rocks The device used in uniaxial compressive strength testing consists of the following parts: a force applying compression machine that constantly applies the required force at a given speed until the end of the test (picture 1);
The uniaxial compressive strength (UCS) represents the strength of the rock. It frequently requires during the introductory phase of mining projects such as tunneling, rock excavation, blast hole designs, etc. Usually, the determination of UCS of rocks is carrying out in a concerned laboratory. The main drawback of determining the …
5.2 Method C, uniaxial compressive strength of rock is used in many design formulas and is sometimes used as an index property to select the appropriate excavation technique. Deformation and strength of rock are known to be functions of confining pressure. Method A, triaxial compression test, is commonly used to simulate the stress …
The uniaxial compressive strength is the classical strength parameter for measuring the rock mass basic property. The uniaxial compressive strength of the core samples along this drillhole was ...
Method C: Uniaxial Compressive Strength of Intact Rock Core Specimens (previously ASTM D2938) Method D: ... Forney supplies the 250 Series, a versatile and ACI-exceeding compression machine …
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 mechanics …
Brace used flat glass to study the rock damage evolution at uniaxial compression 15; Bobet et al. studied the initiation of rock fractures with gypsum as rock-like material 16,17.
In this study, the uniaxial compressive strength (UCS) of rock samples has been predicted using a novel machine learning (ML) algorithm. The efficacy of the algorithm was evaluated by testing the same on a tiny dataset with only 47 samples as well as a large dataset with 170 samples. The UCS of rock samples has some outlier points …
Director, Technical Excellence and Innovation - Mining. The Uniaxial Compressive Strength (UCS) is one of the most stated rock engineering parameters, yet the UCS also appears to be sometimes ...
The uniaxial compressive strength (UCS) is a mechanical property of intact rocks that is important in civil and mining engineering works (Aladejare 2020; Aladejare et al. 2020; Wang and Aladejare 2016a).Design and stability analysis of underground excavations and other geotechnical structures require the input of data like UCS on the …
The prediction of rate-dependent compressive strength of rocks in dynamic compression experiments is still a notable challenge. Four machine learning models were introduced and employed on a dataset of 164 experiments to achieve an accurate prediction of the rate-dependent compressive strength of rocks. Then, the relative importance of …
This paper deals with the analysis of effects of mechanical properties of rock on penetration rate and specific energy. Five specimens were collected from the four locations in Federal capital territory, Abuja. These samples were subjected to laboratory point load strength index using point load testing machine. Results of the point load …
The Schmidt hammer is commonly used for the prediction of unconfined compressive strength and other mechanical properties of rocks from surface rebound hardness values since it is quick, easy, inexpensive, and non-destructive testing method. In this study, metamorphic, sedimentary, and igneous rock samples were collected from …
Multivariate linear and polynomial regression analyses were carried out to find the uniaxial compressive strength of rock (qu, in MPa). The results of the linear models are presented in Table 5. It was observed that the MAE of MLR and MPR model is 12.13 MPa and 3.99 MPa, respectively, which … See more
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. For example, it allows...
For the specimens with the aspect ratio of 1:2.5 and 1:3, the uniaxial compressive strength almost keeps constant while the frictional coefficient increases. It demonstrates that with the decrease of aspect ratio, the influence of the end effect on uniaxial compressive strength is getting smaller and smaller. Fig. 9.
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 ...
Weakly cemented rocks are distributed widely in Jurassic coal-bearing strata in western China. Their uniaxial compressive strength (UCS), as a crucial mechanical property, is generally used in various rock engineering practices. However, the mechanical weakness of weakly cemented rocks makes it challenging to prepare standard samples …
The uniaxial strength, also known as the unconfined compressive strength, of a rock may be regarded as the highest stress that a rock specimen can carry when a unidirectional stress is applied, normally in an axial direction to the ends of a cylindrical specimen.It represents the maximum load supported by a specimen during the test divided by the …
The Uniaxial Compressive Strength (UCS) is an essential parameter in various fields (e.g., civil engineering, geotechnical engineering, mechanical engineering, and material sciences). Indeed, the determination of UCS in carbonate rocks allows evaluation of its economic value. The relationship between UCS and numerous physical and …
In engineering practices, it is critical and necessary to either measure or estimate the uniaxial compressive strength (UCS) of the rock. Measuring the UCS of rocks requires comprehensive studies ...
Rock engineers use the uniaxial compressive strength (UCS) of rocks prevalently in the design of surface and underground structures. UCS is one of the most important engineering parameters in rock mechanics, and it is used to characterize and examine the behaviors of solid rocks. Considering the difficulty of conducting tests on …
The uniaxial compressive strength (UCS) and Young's modulus (E) of rock are important parameters for evaluating the strength, deformation, and stability of rock engineering structures. Direct measurement of these parameters is expensive, time-consuming, and even infeasible in some circumstances due to the difficulty involved in …
The uniaxial compressive strength (UCS) of rock has been recognized as one of the major technical factors of rock-related engineering constructions [1,2,3], and it has also been regarded as the basic parameter of geotechnical engineering designs and constructions [].Moreover, UCS has been used in various aspects of the rock-mass …
The uniaxial compressive strength (UCS) of rocks is an essential input parameter for engineering design in mining and ... (ANFIS), and support vector machine (SVM) to predict UCS of rocks. Likewise, a classication and regression tree (CART) algorithm was applied to develop an empirical model predicting peak strength variation of sandstone
This work examines the compressive strength of natural stones, as estimated by Uniaxial compressive strength tests (UCS) and respective non-destructive tests results (Schmidt Hammer Rebound test, SHR, or an Ultrasonic Pulse Velocity transmission, UPV). In practice, aiming to correlate the values of the UCS test with the …
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 …
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 …
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 complex geological conditions, such as soft rock, fracture areas, and high stress, to adjust the excavation and support plan and ensure …
The Uniaxial Compressive Strength (UCS) is one of the most critical mechanical parameters in rocks (Hasanipanah et al. 2022; Hassan & Arman 2022; …
Determination of the uniaxial compressive strength of rock is an essential parameter in designing rock engineering problems. Laboratory testing procedures to …
By incorporating a multibody failure criterion, 4D-LSM was developed to reproduce high ratios of the uniaxial compressive strength to the tensile strength of rock materials [52]. By coupling DDA, 4D-LSM was applied to solve the problems of rock cutting [53,54] and predict the uniaxial compressive strength of rocks by point load test [55].
The most common tests on cylindrical rock samples are the evaluation of the compressive strength and strain under either uniaxial or triaxial conditions. Uniaxial Tes t: The uniaxial test is performed by applying increasing vertical stress at a constant rate. Axial and radial strains are measured with high precision.
