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  • PAPER OPEN ACCESS Correlation between uniaxial compressive

    Correlation between uniaxial compressive strength (UCS) and blasting geometry on rock excavation at PT Agincourt Resources . D R Nainggolan. 1*, R Sitorus. 2, O N Eveny. 1. and F Sariandi. 1. 1. Mining Engineering Department, Faculty of Mineral Technology University of Pembangunan Nasional Veteran Yogyakarta located on Jl. SWK 104

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  • Laboratory Uniaxial compression test - Rock

    28-09-2015· Laboratory Uniaxial compression test - Rock Mechanics - Granit - Result: 160MPa

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  • uniaxial compressive strength of granite

    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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  • Rock Failure Topics - Stanford Earth

    C o' UCS of zero porosity equivalent (granite) C o' = 254 MPa (Westerly granite) γ= 0.027 (empirical) has made the subject of rock strength sufficiently complex that it can almost never be practically applied in case studies. Thus, the most important thing to keep in mind is

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  • Compressive strength of rocks - PetroWiki

    04-06-2015· Estimating compressive strength. General rock failure criterion can be reduced to a few parameters dependent on lithology (m) and the uniaxial compressive strength (C 0).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 C 0. C 0 can be estimated from porosity or sonic velocities, but

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  • Neural tree for estimating the uniaxial compressive

    Uniaxial Compressive Strength (UCS) is the most important parameter that quantifies the rock strength. However, determination of the UCS in the laboratory is very expensive and time-consuming. Therefore, common index tests like point load (Is-50), ultrasonic velocity test (VP), block punch index (BPI) test, rebound hardness (SRH) test, physical properties, etc., have been used to predict the UCS.

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  • METHODS TO QUANTIFY THE PARAMETERS APPLIED IN THE RMi

    The uniaxial compressive strength of the rock constitutes the highest strength limit of the actual rock mass. ISRM (1981) has defined the uniaxial strength of a rock to samples of 50 mm diameter. A rock is, however, a fabric of minerals and grains bound or welded together. The rock therefore includes microscopic cracks and fissures.

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  • Correlations Between Index Properties and Unconfined

    4.4.4 UCS as a Function of Point Load strength with Weathering weathering on strength and index properties of rock. 2.1 Weathering of Limestone Weathering is a group of processes that transforms rock into mechanically weak and easily eroded material (Parriaux,

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  • compressive strength and the factor m in Hoek-Brown

    i is the parameter for intact rock in the Hoek -Brown failure criterion for rock masses by Hoek et a l. (1998). Values in parenthesis have been estimated by Hoek et al (1992); values with question mark have been assumed 2) For clays the values of the uniaxial compressive strength is based on ISRM (1978), refer to Table 2.7.

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  • Estimating Rock Mass Strength - BM 1997 02

    The strength of jointed rock masses is notoriously difficult to assess. Laboratory tests on core samples are not representative of a rock mass of significantly larger volume. On the other hand, in situ strength testing of the rock mass is seldom practically or economically feasible.

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  • Use of Ultrasonic Velocity Travel Time to Estimate

    The uniaxial compressive strength (UCS) is one of the most common mechanical parameters required in geotechnical engineering to characterize the compressive strength of rock material. Measurements of UCS are expensive, time consuming, destructive and thus, not

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  • Estimating Rock Mass Strength - BM 1997 02

    The strength of jointed rock masses is notoriously difficult to assess. Laboratory tests on core samples are not representative of a rock mass of significantly larger volume. On the other hand, in situ strength testing of the rock mass is seldom practically or economically feasible.

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  • Strength criterion for rocks under compressive

    01-08-2015· B. Haimson, C. ChangA new true triaxial cell for testing mechanical properties of rock, and its use to determine rock strength and deformability of westerly granite International Journal of Rock Mechanics and Mining Sciences, 37 (3) (2000), pp. 285-296

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  • Predicting the compressive and tensile strength of rocks

    Rock engineers have commonly used the uniaxial compressive strength (UCS) and Brazilian tensile strength (BTS) of rock for designing surface and underground structures. Determining these rock strengths is time-consuming and expensive, particularly for the preliminary studies of projects. For this reason, indirect tests such as Schmidt rebound

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  • Ucs Rock Strength Granite - ostseepension

    Ucs Rock Strength Granite. Determination of the uniaxial compressive strength ucs of rocks is an important task for rock and geotechnical engineering applicationsrect measurement is expensive, time consuming and even infeasible in some circumstances due to the difficulty in obtaining core samples.

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  • Lecture 9 – Introduction to Rock Strength David Hart

    that rock strength is affected by the SIZE of the specimen tested. This can be explained simply as being the result of the many flaws found in rock in the form of fissures, pores, cleavage, bedding planes, foliation, etc. The larger the size of the specimen tested the higher the probability that a weak flaw will be available, capable of

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  • Some Useful Numbers - Jackson School of Geosciences

    Granite 24 GPa Shale 1.6 GPa Limestone 24 GPa Chalk 3.2 GPa Sandstone 0.4 GPa Steel 80 GPa Wood 4 GPa Glass 19 GPa Lithostatic pressure gradient 26.46 MPa/km (for = 2.70) Hydrostatic pressure gradient 9.8 MPa/km Unconfined compressive strength Granite 100-250 MPa Basalt 100-300 MPa Quartzite 150-300 MPa Sandstone 20-170 MPa

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  • Predicting Uniaxial Compression Strength (UCS)

    In engineering practice particularly in measuring strength properties of rock, uniaxial compressive strength (UCS) is considered as one of the key in characterizing rock material. However, sometime it is quite difficult or impossible to full fill the test requirement especially when dealing with rock that consists of discontinuities or fractures.

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  • 8. STRENGTH OF SOILS AND ROCKS

    Strength testing of rock is discussed further by Franklin and Dusseault (1989). Stone Mt. granite 55.1 51.0 0 - 69 Indiana limestone 6.7 42.0 0 - 10 . 8-10 8.4 THEORY OF STRENGTH Several theories of strength have been applied to soils and rocks but the most widely

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  • Predicting the compressive and tensile strength of rocks

    Rock engineers have commonly used the uniaxial compressive strength (UCS) and Brazilian tensile strength (BTS) of rock for designing surface and underground structures. Determining these rock strengths is time-consuming and expensive, particularly for the preliminary studies of projects. For this reason, indirect tests such as Schmidt rebound

    Read More +

ucs rock strength granite

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