## Uniaxial Compressive Strength Determination of Rocks Using ...

高达10%返现 · May 31, 2021 · The uniaxial compression strength (UCS) is a typical parameter for rock mass classification in rock engineering (Barton 1973; Barton and Choubey 1977).The UCS determination requires a sufficient number of well-prepared specimens in accordance with the suggested methods by the International Society of Rock Mechanics (ISRM) and is usually time

## Determination of uniaxial compressive strength of ...

Nov 01, 2013 · The uniaxial compressive strength (UCS) of intact rock is an important mechanical parameter which is required for many engineering projects. In some engineering projects such as well drilling for petroleum production, due to the depth of the well, there are some limitations for obtaining rock core samples and determining the UCS.

## 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.

## Estimating uniaxial compressive strength of rocks using ...

Aug 01, 2013 · 1. 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 used to determine UCS of rocks in field and

## Uniaxial Compressive Strength - an overview ...

The uniaxial compressive strength of a rock under static loading often decreases with an increasing temperature at which the rock has been heat-treated before strength testing. This conclusion is drawn from a great number of experiments [1,2,4,8,9,11,17–19].The higher the temperature is, the lower the strength. Some results for uniaxial compressive strength σ c and tensile strength σ t ...

## 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.

## 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 ...

## (PDF) Uniaxial Compressive Strength Test | chandryl ...

Biteghe Chandryl Uniaxial compressive strength test Page 2 fChapter 1 Basics on rock mechanics This introductory chapter define different parameters which characterize a rock. It also presents devices which measure displacements. 1.1 Basic definitions 1.1.1 Strain and Stress Stress The term stress (σ) is used to express the loading in terms of ...

## Bearing Capacity of Rocks

In case of rock mass with favorable discontinuities, the net allowable bearing pressure may be estimated from: q a = q c * N j Where qWhere q c = average uniaxial compressive strength of rock coresaverage uniaxial compressive strength of rock cores N j = empirical coefficient depending on the spacing of the discontinuities 3+S/B 10 []1+300(δ/S) δ= thickness of discontinuity= thickness of ...

## (PDF) Determination of rock mass compressive strength ...

The rock mass compressive strength is a measure of the pe ak load carrying c apacity of a ro ck. mass (i.e stress driven failure) and is likely to be a fraction of the inta ct rock strength due to ...

## Estimating the uniaxial compressive strength of a volcanic ...

International Journal of Rock Mechanics & Mining Sciences 43 (2006) 554–561 Estimating the uniaxial compressive strength of a volcanic bimrock H. Sonmeza,, C. Gokceoglua, E.W. Medleyb, E. Tuncaya, H.A. Nefesliogluc aDepartment of Geological Engineering, Applied Geology Division, Hacettepe University, 06532 Beytepe, Ankara, Turkey

## A predictive model for uniaxial compressive strength of ...

applied, and the rocks were classified according to Folk’s (1962) classification [13]. 2.2. Test Procedures Uniaxial compressive strength test Uniaxial compression tests were performed on cubic samples, which had dimensions of 70 mm. The samples, until constant mass, 70 ± 5 °C were kept in the stove and

## Rock Mechanics (CED 48)—Civil Engineering Division—Public ...

Dec 21, 2016 · Method for the determination of modulus of elasticity and Poisson's ratio of rock materials in uniaxial compression: IS 10050 (pdf) IS 10050 (txt) 1981: Method for determination of slake durability index of rocks: IS 10082 (pdf) IS 10082 (txt) 1981: Method of test for the determination of tensile strength by indirect tests on rock specimens: IS ...

## Validity of uniaxial compression tests for indirect ...

The validity of using laboratory uniaxial compression tests to determine the long-term strength of rock is considered. Results of an experimental study on three types of rocks are analysed, and the usefulness and limitations of the approach are discussed. Different methods of estimating strength are used and the results compared.

## pdf Download AS 4133.4.2: Methods of Testing Rocks for ...

AS 4133.4.2: Methods of Testing Rocks for Engineering Purposes - Rock Strength Tests-Determination of Uniaxial Compressive Strength pdf Download File Size 112.83 KB

## Energy Dissipation-Based Method for Strength Determination ...

Aug 13, 2020 · The energy conversion in rocks has an important significance for evaluation of the stability and safety of rock engineering. In this paper, some uniaxial compression tests for fifteen different rocks were performed. The evolution characteristics of the total energy, elastic energy, and dissipated energy for the fifteen rocks were studied. The dissipation energy coefficient was

## IS 9143 (1979): Method for the determination of unconfined ...

METHOD FOR THE DETERMINATION OF UNCONFINED COMPRESSIVE STRENGTH OF ROCK MATERIALS 0. FOREWORD 0.1 This Indian Standard was adopted by the Indian Standards Inrtitu- tion on 23 March 1979, after the draft finalized by the Soil Engineering and Rock Mechamcs Sectional Committee had been approved by the

## Uniaxial compressive strength - convertf

Uniaxial Compressive Strength Versus Global Strength. 8 hours ago Rocscience More results . Definition of uniaxial compressive strength of a rock mass The Generalized Hoek-Brown criterion is written as a ci ci m b s = + + s s s s s ' ' ' 3 1 3 (1) where s1 ' and s3 ' are the major and minor principal stresses respectively. sci is the uniaxial compressive strength of the intact rock pieces ...

## Determination of Drilling Rate Index Based on Rock ...

The specific rock characteristics that affect penetration rate comprise uniaxial compressive strength (UCS), tensile strength, Young's modulus, hardness and brittleness. In this study, drilling rate index (DRI) is attempted to predict based on UCS and Brazilian tensile strength (BTS) of rocks.

## 8. STRENGTH OF SOILS AND ROCKS

For the uniaxial or unconfined compressive strength test a right circular cylinder of the material is compressed between the platens of a testing machine as illustrated in Fig. 8.1. The compressive strength is then defined as the maximum load applied to crush the specimen divided by the cross-sectional area. Rock strength has been found to be ...

## Estimating Rock Mass Strength - BM 1997 02

The uniaxial compressive strength for the rock mass, σc, rockmass , can be expressed by setting σ3 = 0 in Equation 2.1 thus obtaining σc, rockmass =σc s . (2.2) The uniaxial tensile strength of the rockmass, σt, rockmass , can be found by setting σ1 = 0 in Equation 2.1, thus yielding c (m m s) t 4 2 2, rockmass = − + σ σ . (2.3)

## Uniaxial Compression Test

Uniaxial Compressive Strength Standard index property (q u =σσσu = σσσσc) Analogous tests in concrete and soil (unconfined compression test). ASTM 4543. 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.

## A STUDY ON MODES OF ROCK FAILURE UNDER UNIAXIAL

3.4 Determination of water content 18 3.5 Determination of porosity & density 19 3.6 Determination of slake durability index 21 3.7 Determination of tensile strength 22 3.8 Determination of hardness 24 3.9 Determination of unconfined compressive strength 24 3.10 Determination of compressive strength 25 3.11 X- Ray analysis 26

## 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.

## Measurement Uncertainty in Testing of Uniaxial Compressive ...

rock sample uniaxial compressive strength and deformability. The interdependence of uncertainty contribution is analyzed and guides for improving measurement uncertainty are given. The achieved uncertainties are compared to typical uncertainties in the determination of concrete and metallic material compressive strength and deformability.

## Compressive Strength Of Rock - Ulang

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.

## The determination of uniaxial compressive strength from ...

Abstract The point load test has often been reported as an indirect measure of compressive strength. It has been used widely in practice due to easy testing, the simplicity of specimen preparation, and possible field applications. Many researchers have investigated the relation between uniaxial compressive strength (UCS) and point load index (Is) for different rock types.

## 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

Sep 15, 2016 · 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 ...

## Energy Dissipation-Based Method for Strength

ResearchArticle Energy Dissipation-Based Method for Strength Determination of Rock under Uniaxial Compression M. M. He ,1,2 F. Pang,2 H. T. Wang,2 J. W. Zhu,3 and Y ...

## (PDF) Chapter 4 Properties of Rock Materials CHAPTER 4 ...

Chapter 4 Properties of Rock Materials CHAPTER 4 PROPERTIES OF ROCK MATERIALS Physical Properties of Rock Material 4.1.1 Density, Porosity and Water Content. Momo yuyu. ... A Study on Strength and Deformation Behaviour of Jointed Rock Mass. By Smrutirekha Sahoo. Petroleum Related Rock Mechanics.

## Prediction of physico-mechanical properties of intact ...

2 天前 · The uniaxial compressive strength (UCS) of rock is an important parameter required for design and analysis of rock structures, and rock mass classification. ... determination of rock

## Uniaxial compressive strength - convertf

Uniaxial Compressive Strength Versus Global Strength. 8 hours ago Rocscience More results . Definition of uniaxial compressive strength of a rock mass The Generalized Hoek-Brown criterion is written as a ci ci m b s = + + s s s s s ' ' ' 3 1 3 (1) where s1 ' and s3 ' are the major and minor principal stresses respectively. sci is the uniaxial compressive strength of the intact rock pieces ...