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compressive strength of rock core

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

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  • MP 212.01.21 TEST METHOD FOR UNCONFINED
    MP 212.01.21 TEST METHOD FOR UNCONFINED

    1.1 To establish a procedure for testing the unconfined compressive strength of rock core specimens. 2.0 SCOPE 2.1 This procedure shall apply to nominal 2-inch (51 mm) diameter rock core specimens obtained for the purpose of determining the uniaxial compressive strength of rock. 2.2 This procedure will specify the requirements for the apparatus

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  • Assessing Rock Compressive Strength and Predicting
    Assessing Rock Compressive Strength and Predicting

    Compressive Strength (UCS). It is one of the most basic parameters of rock strength, and most common determination performed for boreability predictions. 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

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  • USING THE POINT LOAD TEST TO DETERMINE THE
    USING THE POINT LOAD TEST TO DETERMINE THE

    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

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  • Laboratory Testing and Interpretation of Rock
    Laboratory Testing and Interpretation of Rock

    Compressive strength (qu = F u) of core in unconfined compression (uniaxial compression test) - D 2938* Triaxial compressive strength without pore pressure T 226 D 2664 Creep Tests Creep-cylindrical hard rock core in uniaxial compression - D 4341 Creep-cylindrical soft rock core in uniaxial compression - D 4405 Creep-cylindrical hard rock core

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  • CLASSIFICATION // CHARACTERIZATION OF SOME ROCK
    CLASSIFICATION // CHARACTERIZATION OF SOME ROCK

    of the core is observed or suspected, its nature and degree should be recorded after the description of the basic parameters. Intact rock strength . The uniaxial compressive strength of a rock material constitutes the highest strength limit of the rock mass of which it forms a part

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  • IS 9143 (1979): Method for the determination of
    IS 9143 (1979): Method for the determination of

    0.2 The unconfined compressive strength test is primarily an index test for strength classification of rock materials. Although it may be used in the laboratory, it is mainly intended for field measurements on rock core and outcrop specimens. The apparatus used in the test is light and

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  • The effect of length to diameter ratio of test specimens
    The effect of length to diameter ratio of test specimens

    Jul 17, 2009 One of the parameters which affect the uniaxial compressive strength (UCS) of rock materials is the length to diameter ratio (L/D) of test cores. ASTM recommends a ratio of between 2 and 2.5, and ISRM suggests 2.5–3:1. Research has shown that high UCS values are obtained for L/D ratios 2, a very slight difference in values between 2 and 2.5, and they remain effectively constant with a L/D

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  • THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT ROCK
    THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT ROCK

    Keywords: soft rock, uniaxial compressive strength, physical characte ristic, point load strength index, and conversion factor. INTRODUCTION strength due to changes in moisture content seems 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

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  • ore crushing
    ore crushing

    Crushing in Mineral Processing 911 Metallurgist. 26/12/2015 The Compressive Strength of rocks is measured by crushing cylinder shaped (drill core) ore samples of 2″ x 2″ (51mm X 51mm) This techniques allows for a rocktorock relative comparison The Bond’ Crushing Work Index is

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  • An approach to predict the length-to-diameter ratio of a
    An approach to predict the length-to-diameter ratio of a

    Feb 26, 2019 This study aimed to evaluate the effect of length-to-diameter ratio (L/D) of a rock core specimen on uniaxial compressive strength (UCS) and to investigate the optimum L/D range for different rock types. For this purpose, a considerable amount of rock block was compiled and a series of laboratory tests were carried out to determine some geo-mechanical properties of the rocks and the UCS values

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  • Mechanical properties of coral skeleton: compressive
    Mechanical properties of coral skeleton: compressive

    Apr 08, 2016 Measurement of the compressive strength and elastic modulus of the skeletal material of three common Caribbean corals suggests that the mechanical properties of coral skeleton are an important factor in the adaptive repertoire of these animals

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  • SOME DRILLING PARAMETERS AS A TOOL TO PREDICT
    SOME DRILLING PARAMETERS AS A TOOL TO PREDICT

    uniaxial compressive strength of tested rocks. Tables 1, 2 and 3 give an example for the calculation of specific energy (SE) and UCS/SE in limestones, marbles and granites at different loads and drilling speed of 1000 rpm. Each rock type has been represented by its compressive strength. By the same way results of

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  • Estimating the uniaxial compressive strength of a
    Estimating the uniaxial compressive strength of a

    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

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  • ASTM D7012 - 14e1 Standard Test Methods for
    ASTM D7012 - 14e1 Standard Test Methods for

    1.5 This standard replaces and combines the following Standard Test Methods: D2664 Triaxial Compressive Strength of Undrained Rock Core Specimens Without Pore Pressure Measurements; D5407 Elastic Moduli of Undrained Rock Core Specimens in Triaxial Compression Without Pore Pressure Measurements; D2938 Unconfined Compressive Strength of Intact Rock Core Specimens; and D3148 Elastic Moduli of Intact Rock Core Specimens in Uniaxial Compression

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  • Unconfined Compressive Strength Test of Rock
    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 specimen ends

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  • STRENGTH PROPERTIES OF ROCKS AND ROCK
    STRENGTH PROPERTIES OF ROCKS AND ROCK

    Table 1. Typical values of uniaxial strength (in MPa) for nine common rock types (after Johnson and Degraff, 1988). Rock Tensile Strength (MPa) Compressive Strength (MPa) Limestone Sandstone Sandstone Sandstone Mudstone Limestone Limestone Ironstone Sandstone 18.00 0.62 (20) 19.17 0.21 (23) 23.10 0.48 (19) 24.21 0.83 (8) 35.17 3.17 (4) 36.28 1.24 (24)

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  • Standard Test Method for Unconfined Compressive
    Standard Test Method for Unconfined Compressive

    Withdrawn Rationale: This test method specifies the apparatus, instrumentation, and procedures for determining unconfined compressive strength of intact rock core specimens. Formerly under the jurisdiction of Committee D18 on Soil and Rock, this test method was discontinued in May 2005 and replaced by D 7012, Test Method for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens Under Varying

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