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 ...

Procedure helps to determine the diametrical and axial point load strength index of rock cores, cut blocks or irregular lumps, which may be tested without any treatment. In the test, load is …

In the laboratory, UCS, E t, and LRH were performed on 90 core samples extracted from 30 different rock boulders collected from the neighboring area of Umm al-Jimal, a historic city in ...

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 tests are a direct ...

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 ...

The uniaxial compressive strength and static Young's modulus (E s) 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.

PDF | On Apr 20, 2013, Deepak Amban Mishra and others published Estimation of uniaxial compressive strength of rock materials by index tests using regression analysis and fuzzy inference system ...

General rock failure criterion can be reduced to a few parameters dependent on lithology (m) and the uniaxial compressive strength (C0). Lithology is commonly derived during log analysis, so m may be estimated (Table 1). What is needed still is an initial measure of rock strength provided by C0. C0can be estimated from p…

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 …

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 ...

Based on the results of this study, it was found that the effects of micro-parameters on the H-B parameter mi can be different depending on the type of rock, however this parameter has an inverse ...

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 ...

According to previously published results, the strength of different rocks such as marl, limestone, sandstone, tuff, granite, and marble increased significantly due to freezing when the samples ...

The knowledge of geomechanical properties of rocks is essential for planning and design of structures in civil, mining, and other allied industries. Direct assessment of these properties is quite expensive and time consuming. It also requires fine precision in sample preparation and high-end testing instruments. To overcome these problems, 597 rock samples …

about granitic rocks, but the results are different and are ... pressive strength had an increasing trend with increasing grain size for 0 to 5 mm; and in the following it had a de-

Under different fracture modes, the temperature ranges that influence the tensile strength of rocks are different. With the growth of temperature, the fracture toughnesses (K IC and K IIC) and equivalent fracture toughness K eff of the three groups of rock specimens under different fracture modes all gradually reduced. For rock specimens ...

The unconfined compressive strength (UCS) of intact rocks is an important geotechnical parameter for engineering applications. Determining UCS using standard laboratory tests is a difficult, expensive and time consuming task. This is particularly true for thinly bedded, highly fractured, foliated, highly porous and weak rocks. Consequently, prediction models …

pressive strength or deformability of a rock material is time consuming, expensive and involves destructive ... [0.045(N+3.5)+c] – Different rock types and coal Singh et al. (1983) UCS=2N 0.72 ...

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 ...

The numerical model is calibrated to reproduce the behaviors of different anisotropic rocks. Detailed analyses are conducted to investigate the brittle failure process by looking at stress-strain ...

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 ...

Uniaxial compressive strength is an important mechanical parameter for rock mass engineering. Hence, how to determine the UCS simply and accurately have drew numerous attention. In this paper, the references related to UCS estimation using indirect tests were reviewed, and three stages of the development of indirect UCS estimation were classified. …

In previous statistical studies on igneous hard rocks, the correlation of uniaxial compressive strength (UCS) values in different diameters with estimations of specimen size …

pressive strength, density, elastic modulus, and hardness of the 10 rocks. And the rocks are classified based on the -Miller rock mass classification system.

A rock with a UCS range of 0.25-25 MPa is classified as extremely weak to weak rock [10]. Another definition of soft rock given by [11] as any rock with UCS less than 20 MPa; [12] presented a ...

The following table provides a comprehensive list of compressive strength values for different rocks at standard room temperature (approximately 20°C or 68°F). Click on the icon to switch between SI (MPa) and US customary (psi) units.

specimen, o, is the uniaxial compressive strength of a rock specimen having a different diameter, and D is the diameter of the specimen. ... pressive strength determinations on 50 mm diameter ...

pressive strength of rock. Int J Rock Mech Min Sci. 75:73–81. Wang Y, Aladejare AE (2016a) Bayesian characterization of ... the performance of different rock properties and rock slope conditions ...

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 ...

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 ...