uniaxial compressive strength of rock

On the Ratios between Elastic Modulus and Uniaxial ...

Aug 12, 2010· Ocak I (2008) Estimating the modulus of elasticity of the rock material from compressive strength and unit weight. J S Afr Inst Min Metall 108(10):621–629 Google Scholar Palchik V (1999) Influence of porosity and elastic modulus on uniaxial compressive strength …

Compressive strength of rocks - petrowiki.org

In order to investigate the relation between uniaxial compressive strength and point load strength, several homogeneous rock specimens were tested, and the influence of the different rock type was ...

Testing rock specimen for Uniaxial Compressive Strength ...

Jun 11, 2017· This test shows how we tested a rock specimen to help determine the appropriate Rock Anchor for this rock type. ... Testing rock specimen for Uniaxial Compressive Strength ...

Estimating Uniaxial Compressive Strength of Tropically ...

Uniaxial compressive strength (UCS) of intact rock is particularly important in rock mechanic studies, especially for those involving civil and mining projects. However, the determination of UCS using direct test is generally expensive, time consuming and almost impossible in preparation of samples for highly weathered sedimentary rocks.

Uniaxial Compressive Strength (UCS) test - In situ rock ...

Uniaxial Compressive Strength (UCS) test To study the rock failure behaviour, for example the rock spalling potential, the relationship of the UCS, and the ratio of the UCS and the tensile strength will give an estimation of the spalling potential.

ASTM D7012 - 14e1 Standard Test Methods for Compressive ...

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 conditions under which most underground rock masses exist.

Unconfined Compressive Strength Test of Rock

This test method specifies the apparatus, instrumentation, and procedures for determining unconfined compressive strength of intact rock core specimens. This procedure is identical to ASTM D 2938 except that the cores are tested after cutting without grinding, and neoprene caps are used on the specimen ends. Unconfined Compressive Strength Test Procedure Check the ability of the spherical …

Estimating Unconfined Compressive Strength of …

[4] relating uniaxial compression and the point load tests on a variety of rocks. They found the following linear regression model to correlate the UCS and I s(50). qI u = +16.3 15.3 s(50) 3. The UCS Test There are three types of compressive strength tests of rocks as defined by Jaegar l. …

ASTM D7012 - 07 Standard Test Method for Compressive ...

D7012 - 07 Standard Test Method for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures, compression testing, compressive strength, confined compression, loading tests, modulus of elasticity, repeatability, reproducibility, rock, uniaxial compression, Young's Modulus,

DEFORMABILITY PROPERTIES OF ROCKS AND ROCK MASSES …

DEFORMABILITY PROPERTIES OF ROCKS AND ROCK MASSES 1. INTRODUCTION 2. DEFORMABILITY OF INTACT ROCK 2.1 Rock under Uniaxial Compression 2.2 Dynamic Elastic Constants 2.3 Hooke's Law ... determining the uniaxial compressive strength and deformability of rock materials, Int. J. Rock

Rock failure relationships - petrowiki.org

Hoek-Brown equations. Hoek and Brown compiled extensive data on a variety of rock types and produced relationships that are simple and can be developed into forms amenable to well-log analysis. A primary feature of this failure criterion is a relation between the maximum and minimum stresses when both are normalized by the uniaxial compressive strength

Uniaxial compression tests - SP

This and many other reports on unixial compression tests, conducted at SP, are published on SKB. Examples of standards. ISRM 1979, Suggested methods for determining the uniaxial compressive strength and deformability of rock materials. Int J Rock Mech Min Sci Geomech Abs 16(2), sid 135-140.

(PDF) The Uniaxial Compressive Strength of Soft Rock

Soft rock is a term that usually refers to a rock material with a uniaxial compressive strength (UCS) less than 20 MPa. This low strength range might be influenced by physical characteristics ...

THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT ROCK

The term soft rock is often referred to rock materials with a uniaxial compressive strength (UCS) lower than that of hard rocks and higher than that of soils. A rock material can be classified as a soft rock if it has a uniaxial compressive strength below 20 MPa, determined directly by uniaxial compression …

uniaxial compressive strength vs bearing pressure ...

Dec 09, 2009· (Yes, that is correct...only 8000 pounds per square foot.) I saw an article that recommends that the grout-to-rock ulitmate bond strength could be estimated as one tenth the uniaxial compressive strength. The geotechnical report that is available makes recomendations on the bearing capacities but does not address the uniaxial compressive strength.

Estimating Rock Mass Strength - BM 1997 02

s = constant depending on the characteristics of the rock mass, σc = uniaxial compressive strength of the intact rock material, σ1 = major principal stress at failure, and σ3 = minor principal stress at failure. The uniaxial compressive strength for the rock mass, σc, rockmass, can be expressed by setting σ3 = 0 in Equation 2.1 thus obtaining

Estimation of uniaxial compressive strength of rock ...

Estimation of uniaxial compressive strength of rock materials by index tests using regression analysis and fuzzy inference system D.A. Mishra, A. Basu ⁎ Department of Geology & Geophysics, Indian Institute of Technology Kharagpur, Pin-721302, India a r t i c l e i n f o

Prediction of The Uniaxial Compressive Strength of Rocks ...

Prediction of The Uniaxial Compressive Strength of Rocks Materials: 10.4018/978-1-5225-2709-1.ch002: This study briefly will review determining UCS including direct and indirect methods including regression model soft computing techniques such as fuzzy

Using the point load test to determine the uniaxial ...

Point load testing is used to determine rock strength indexes in geotechnical practice. The point load test apparatus and procedure enables economical testing of core or lump rock samples in either a field or laboratory setting. In order to estimate uniaxial compressive strength, index-to-strength conversion factors are used.

USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL ...

the uniaxial compressive strength (UCS), and to propose appropriate Is50 to UCS conversion factors for different coal measure rocks. The rock strength determined by the PLT, like the load frame strengths that they estimate, are an indication of intact rock strength and not necessarily the strength of the rock mass. THE UNIAXIAL COMPRESSIVE ...

Estimating thestrength ofrock materials - SAIMM

1.12.1952 rock sample Uniaxial compressive strength 72 2277 6597 2,89 Uniaxial tensile strength 12 249 316 1,27 Triaxial strength 13 261t 964 3,69 Modulus ofelasticityt 54 607 3072 5,06 Poisson's ratio:j: 53 565 2882 5,10 I TOTAL (first three I properties) 97 2787 7877 2,83 TABLE II SUMMARY OFTHE CSIR ROCK TESTING SERVICES. TOTHE MINING ...

uniaxial compressive strength - an overview ...

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 of NQ, HQ, or PQ diamond drill core and record the maximum axial load sustained at the point of failure.

Uniaxial compressive strength test on granite - YouTube

Jun 16, 2015· This film shows a uniaxial compressive strength test, which is designed to measure the unconfined strength from a specimen of kaolinised Carnmenellis Granite from west Cornwall, England ...

Measurement of uniaxial compressive strength of rocks ...

The uniaxial compressive strength of intact core specimens (UCS) was plotted against the compressive strength of the reconstructed cores (q u) from rock cuttings (Figs. 2a and b). A reasonable correlation between q u and UCS was found. Accordingly, a …

uniaxial compressive strength - Schlumberger Oilfield Glossary

A measure of a material's strength. The uniaxial compressive strength (UCS) is the maximum axial compressive stress that a right-cylindrical sample of material can withstand before failing. It is also known as the unconfined compressive strength of a material because confining stress is set to zero.

Lecture 9 – Introduction to Rock Strength David Hart ...

UNIAXIAL COMPRESSIVE STRENGTH C o (x 1000 psi) 0 50 100 150 SPECIMEN LENGTH L (in.) VARIATION OF COMPRESSIVE STRENGTH WITH SIZE C o = 35 x L-0.14 In this plot of the size effect on strength, a power function was used to best-fit the experimental data. NOTE, however, that beyond L=36 in. the size effect ceases to be of much consequence.

STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 ...

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 2.3 Uniaxial Tension 2.4 Indirect Tension Tests 2.5 Shear Tests 2.6 Confined Compression Tests (Triaxial Tests) 2.7 Biaxial and Multiaxial Tests 2.8 Other Tests 3. PARAMETERS AFFECTING ROCK STRENGTH 4.

Correlation between Uniaxial Compressive Strength and ...

indirect measure of the compressive or tensile strength of the rock. D'Andrea et al.[4] performed uniaxial compression and the point load tests on a variety of rocks. They found the following linear regression model to correlate the UCS and Is(50). qu = 16.3 + 15.3 Is(50) where qu = Uniaxial Compressive Strength of rock.