Pressive Strength Of Different Rocks
Physical parameters, tensile and compressive strength of dolomite rock
Lakirouhani [17] studied the strength, physical, and engineering index parameters of dolomitic rocks with the same mineral composition but different grain size, found that there are significant ...
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[PDF] Predicting the Uniaxial Compressive Strength and …
The uniaxial compressive strength and static Young's modulus ( Es ) of intact rocks are the most important geotechnical parameters for stability analysis of surface and underground structures. These parameters are obtained by the uniaxial compressive test. Although this test is simple, the preparation of the samples, especially of soft rocks, is a hard and time consuming task.
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Predicting the Uniaxial Compressive Strength and Static …
related to rock properties. Inoue and Ohomi 1981 tested many soft rocks in order to confirm the relations among uniaxial compressive strength, p-wave velocity, and density. They expressed the ...
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Compressive Strength of Rocks
Compressive strength is an important property of rocks in many engineering applications, such as the design of foundations, dams, and tunnels. The following table provides a comprehensive list of compressive strength values for …
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Using non-destructive tests for estimating uniaxial …
The properties of weak volcanic rock samples in different strength, welding degree, and geologies were analyzed. In all the prediction models, the tangent modulus of elasticity is used as a dependent variable, while the seismic P wave velocity (Vt), dry unit weight (ad), axial point load strength (Is50a), diametral point load strength (Is50d ...
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Determination of critical saturation degree in rocks …
pressive strength tests on 78 rock samples from 4 different lithologies in two dry and saturated condi-tions. The results showed that the compressive ... types of samples out of four different lithologies with clayey infilling (Fig. 3). It is clearly observed that due Table 2 Saturation degree in various samples
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New approach for assessing uniaxial compressive …
The unconned compressive strength (UCS) is one of the important strength index parameters widely used for the safe and proper design of many engineering systems and structures, such as slope stability analysis, engineering rock blasting, and many rock engineering projects (Haftani et al. 2014; Özkan et al. 2015; Komadja et al. 2021).
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Dynamic increase factors of rock strength
pressive and tensile strength of rocks over a wide scope of strain rates. The updated DIF can be of direct ... of dynamic loadings with different strain rates, and exhibit rate dependency. A ...
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Excavatability assessment of rock masses using the …
pressive strength, weathering degree and spacing of dis-continuities. Some of them also include seismic velocity, as ... dinal waves in the rock mass for different rock types. Scoble and Muftuoglu ...
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Estimation of uniaxial compressive strength of rock materials …
Uniaxial compressive strength (UCS) is one of the most widely used rock mechanical parameters in rock engineering like design and construction of foundations, …
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Numerical simulation of mechanical behavior of rock …
To conduct the investigation, the researchers used RS2D, a rock-soil software, to examine the impact of different incremental displacements and confining stresses on the strength properties of ...
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STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES
STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1. INTRODUCTION 2. TESTING OF INTACT ROCK FOR STRENGTH 2.1 Uniaxial Compression 2.2 Point Load Testing ... Various 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, …
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A Neuro-Genetic Network for Predicting Uniaxial Compressive Strength of
Uniaxial Compressive Strength (UCS) is considered as one of the most important parameters in designing rock structures. Determination of this parameter requires preparation of rock samples which is costly and time consuming. Moreover discrepancy of laboratory test results is often observed. To overcome the drawbacks of traditional method of UCS measurement, in …
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Several machine learning techniques comparison for the …
The Brazilian tensile strength (BTS) test is suggested by the International Society of Rock Mechanics and the American Society for Testing Materials and is widely used to assess the TS of rocks ...
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Estimation of uniaxial compressive strength of rock …
Semantic Scholar extracted view of "Estimation of uniaxial compressive strength of rock materials by index tests using regression analysis and fuzzy inference system" by D. Mishra et al. ... model using a neural tree predictor that estimates the UCS with high accuracy and assess the effectiveness of different index tests in predicting the UCS ...
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Rock mass properties
Brown failure criterion for jointed rock masses is defined by: (1) where and are the maximum and minimum effective principal stresses at failure, is the value of the Hoek-Brown constant m for …
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Prediction of unconfined compressive strength of …
strength (UCS) of intact rocks is an important geotechnical parameter for engineering applications. Determining UCS using standard laboratory tests is a difficult, expensive and …
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Size-dependent compressive strength properties of hard rocks and rock …
the prediction of uniaxial compressive strength in different diameters for concrete specimens (Blanks & mcnamara, 1935) with different water-to-cement ratios (a. w/c = 0.53, b. w/c = 0.54, and c ...
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Indirect estimation of unconfined compressive strength of carbonate
The unconfined compressive strength (UCS) of rocks, one fundamental parameter, is widely used in geotechnical engineering. Direct determination of the UCS involves expensive, time-consuming and destructive laboratory tests. These tests sometimes are difficult to be prepared for cracked rocks. In this way, indirect estimation of the UCS of rocks is widely …
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Predictive Modeling of Uniaxial Compressive Strength of Rocks …
This study established an artificial neural network (ANN) approach to predict uniaxial compressive strength (UCS) in MPa of soft sedimentary rocks using different input parameters i.e. dry density ...
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Correlation Between Point Load Index and Uniaxial Compressive Strength
In this work, tests were conducted on different types of Indian rocks, and an attempt was made to demonstrate the correlation among different rock types individually. Plotting all the data together, the relation is nearer to the general assumption of a conversion factor of 22–24 between PLI and UCS values.
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Empirical relations between rock strength and physical …
models for various rock types in different geological settings, it is necessary to understand the characteristics of the models and their range of applicability prior to utilizing them. In order to …
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Prediction of Uniaxial Compressive Strength of Different Quarried Rocks
The direct measurement of uniaxial compressive strength (UCS) as one of the main important rock engineering parameters is destructive, cumbersome, difficult and costly. Therefore, the prediction of this parameter using simpler, cheaper indirect methods is of interest. In this paper, the UCS was predicted using a developed hybrid intelligent model including …
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Strength classes of rocks. | Download Scientific Diagram
This is because TC can be generally determined for rocks hav- ing compressive strength of more than 20 MPa. Hence, rock strength can be classified based on TC only for rock having com- pressive ...
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Correlation between uniaxial strength and point load index of rocks
Based on previous scholars' research results, there is a strong correlation between the point load strength and the uniaxial compressive strength. The parameters of the rocks from different ...
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Physio-Mechanical Characterisation of Rocks
pressive strength, density, elastic modulus, and hardness of the 10 rocks. And the rocks are classified based on the -Miller rock mass classification system.
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A Correlation Equation on the Influence of Length to …
Rock materials with unconfined compressive strength (UCS) less than 20 MPa are termed as soft rocks. The factors on which UCS may depend are shape and size of specimen, rate of loading, degree of saturation and so on, which are termed as external factors, while defects, porosity, mineralogy and degree of weathering are termed as internal factors.
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Uniaxial compressive strength vs. point-load strength
The prediction of strength properties is a topic of interest in many engineering fields. The common tests used to evaluate rock strength include the uniaxial compressive strength test (UCS ...
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Investigation on disc cutter behaviors in cutting rocks of different
The experimental results obtained from different rocks varying from relatively soft rock (σc=27.6 MPa) to extremely hard rock (σc=355.54 MPa) are compared to the results of the semi-theoretical ...
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Journal of Testing and Evaluation
pressive strength, density, elastic modulus, and hardness of the 10 rocks. And the rocks are classified based on the -Miller rock mass classification system.
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