# determination uniaxial compressive strength of rocks

### CORRELATION ANALYSIS OF UNIAXIAL COMPRESSIVE

Point load index and uniaxial compressive strength are often linked for simple determination of strength especially during the initial design stage of rock projects. The index test is used as an indirect measurement of uniaxial compressive strength because it

Get Price### Predicting the Uniaxial Compressive Strength and Static

Jan 01, 2009The 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.

Get Price### Correlations of Uniaxial Compressive Strength of Rock

There has been a lot of interest in the relationship between uniaxial compressive strength (UCS) and other properties of rock. Evaluation of rock parameters such as cohesion, Young's modulus, angle of friction, and Poisson's ratio is required for numerical modeling of rock.

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SM for Determining the Uniaxial Compressive Strength and Deformability of Rock Materials 1979 Part 1 SM for Determination of the Uniaxial Compressive Strength of Rock Materials Part 2 SM for Determining Deformability of Rock Materials in Uniaxial Compression SM for Determining the Strength of Rock Materials in Triaxial Compression 1978

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rate) of percussive or rotary drilling rig, the uniaxial compressive strength, the impact strength index and natural density are found to be the dominant properties affecting penetration rate of rotary drills. Index Terms- uniaxial compressive strength, impact strength index, natural density, point load, correlation coefficient I. INTRODUCTION

Get Price### An Investigation of the Uniaxial Compressive Strength

minerals Article An Investigation of the Uniaxial Compressive Strength of a Cemented Hydraulic Backﬁll Made of Alluvial Sand Guangsheng Liu 1,2,3, Li Li 2,*, Mike Yao 4, David Landry 5, Farid Malek 5, Xiaocong Yang 3 and Lijie Guo 3 1 School of Civil and Resources Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China

Get Price### A predictive model for uniaxial compressive strength of

Uniaxial compressive strength (UCS) is considered to be one of the important parameters in rock engineering projects. In order to determine UCS, direct and indirect techniques are employed. In the direct approach, UCS is determined from the laboratory UCS test.

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used to estimate the uniaxial compressive strength of the rock. The average density and porosity of the shale are 2.39 g/cm3 and 38.4%. The average uniaxial compressive strength and point load index values are 34.20 MPa and 1.60 MPa respectively. From the results, the strength parameters indicated high strength classification. The

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determine the uniaxial compressive strength V ci and the Hoek-Brown constant m i as described by Hoek and Brown (1980a). In this analysis, equation (5) is re-written in the form (6) where ' x V 3 and ' 2 y (1 3) For n specimens the uniaxial compressive strength, the constant and the coefficient of determination 2 r are calculated from n x x

Get Price### Rock Compressive Strength A Correlation from

The purpose of this paper is to study the strength of rocks by determining their Unconfined Compressive Strength (UCS), correlate the determined strength to physical properties of rocks that can be measured from formation evaluation data and derive an equation that can be used to derive rock strength from formation evaluation measurements.

Get Price### Correlation of sandstone rock properties obtained from

Numerous methods have been developed for determination the unconfined compressive strength. These methods include the field and laboratory tests. Also, to determine the real value of unconfined compressive strength of rocks, special techniques should be followed

Get Price### Prediction of Rock Strength using Drilling Data and

Uniaxial compressive strength (UCS) test is widely used for estimating the mechanical properties of rock material in rock engineering projects. In order to determine UCS, direct and indirect techniques are available. In the direct approach, UCS is determined from the laboratory UCS tests.

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Standard Test Method for Determination of the Point Load Strength Index of Rock and Application to Rock Strength Classifications ASTM D5731 Point Load Strength Index, Estimated Uniaxial Compressive Strength, Strength Anisotropy Index

Get Price### Full text of IS 9143 Method for the determination of

SCOPE 1.1 This standard covers the method for determination of unconfincd compressive strength of a rock sample in the form of specimens of regular geometry. 2. APPARATUS 2.1 A suitable loading machine shall be used for applying and measuring the axial load to the specimen, jft shall be of sufficient capacity and capable of applying load at a rate conforming to the requirements given in 4.3.

Get Price### Predicting the compressive and tensile strength of

Predicting the compressive and tensile strength of rocks from indentation hardness index 334 MAY 2012 VOLUME 112 The Journal of The Southern African Institute of Mining and Metallurgy Table II Indentation hardness index (IHI), uniaxial compressive strength (UCS), Brazilian tensile strength

Get Price### Mechanical properties of Finnish rocks based on uniaxial

The analysis of results confirms that the strength and mechanical properties of the Finnish rocks differ quite a lot depending on the place of occurrence. Based on the statistical analysis made in this thesis, have been lead out several multiple regression models for determination uniaxial compressive strength.

Get Price### HOW TO DO UNCONFINED COMPRESSIVE STRENGTH TEST

Nov 28, 2015The undrained shear strength (s u) of clays is commonly determined from an unconfined compression test. The undrained shear strength (s u) of a cohesive soil is equal to one-half the unconfined compressive strength (q u) when the soil is under the

Get Price### Correlation of sandstone rock properties obtained from

Numerous methods have been developed for determination the unconfined compressive strength. These methods include the field and laboratory tests. Also, to determine the real value of unconfined compressive strength of rocks, special techniques should be followed

Get Price### Schmidt hammer test MADEN

3.4 Schmidt hammer test The Schmidt hammer rebound test was developed to determine the compressive strength of concrete, and has been used to determine the hardness and compressive strength of rock material (ISRM 1978a). This equipment is portable, easy to use, and can be applied both in die laboratory and İn tihe field.

Get Price### Assessing Rock Compressive Strength and Predicting

The unconfined (or uniaxial) compressive strength (UCS) of a rock is a common measure of the strength of intact rock. It is normally measured on cylinders of rock core by compressing the core between two platens and measuring. Log Based Bit Selection Method. Identified 5 to 6 drilled wells in identified fields.

Get Price### An alternative method for in situ determination of rock

The friction-transfer method, which is described in this paper, can be used for in situ determination of intact rock strength. With this method it is possible to estimate the equivalent uniaxial compressive strengths (UCS), using appropriate calibration graphs.

Get Price### PREDICTION OF UNCONFINED COMPRESSIVE STRENGTH OF ROCKS

Unconfined compressive strength (UCS) of rocks is a crucial parameter in designing geotechnical structures. Owing to difficulties in obtaining proper samples for UCS test as well as the point that conducting UCS is relatively expensive, the use of indirect methods for UCS estimation has drawn considerable attentions.

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determination of Uniaxial Compressive Strength of rock . This research presents a new correlation obtained through a set of experimental tests carried out on three types of rocks belonging to three formations of different ages (Pila Spi

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Prediction of uniaxial compressive strength of intact rocks using ultrasonic pulse velocity and rebound-hammer number Levent Seluk Yuzuncu Yıl University, Architectural-Engineering Faculty, Department of Geological Engineering, Van 65080, Turkey

Get Price### Compressive Strength Of Rocks greenrevolution

determination uniaxial compressive strength of rocks Elastic Moduli of Intact Rock Core Specimens in Uniaxial . 1.1 This test method covers the determination of elastic moduli of intact rock core specimens in

Get Price### CORRELATION ANALYSIS OF UNIAXIAL COMPRESSIVE

Point load index and uniaxial compressive strength are often linked for simple determination of strength especially during the initial design stage of rock projects. The index test is used as an indirect measurement of uniaxial compressive strength because it

Get Price### 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.

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1.1 Rock tensile strength The tensile strength is generally low compared to its compressive strength. Direct tensile strength tests of rocks are not routinely conducted because of the difficulty in specimen prepa-ration. Indirect methods, such as bending and Brazilian tests, are often used to obtain the tensile strength of rocks.

Get Price### Determination of Uniaxial Compressive Strength of

The uniaxial compressive strength (UCS) of rock material is a crucial parameter to be used for design stages of slopes, tunnels and foundations to be constructed in/on geological medium. However, preparation of high quality cores from geological mixtures or fragmented rocks such as melanges, fault rocks, coarse pyroclastic rocks, breccias and sheared serpentinites is often extremely difficult.

Get Price### A STUDY ON MODES OF ROCK FAILURE UNDER

A STUDY ON MODES OF ROCK FAILURE UNDER UNIAXIAL COMPRESSION 3.10 Determination of compressive strength 25 3.11 X- Ray analysis 26 3.12 SEM / EDX Analysis 28 . Chapter 4 29 Failure in Uniaxial Compression Rock examines under uniaxial compressive anxiety, on account of uneasiness centers

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