rock breaker vs compresive strenght

  • Estimating the strength of rock materials SAIMM

    It is shown that the uniaxial compressive strength of rock can be conveniently determined from the pointload strength index, which isobtained . (constant load, gradually increasing monotonically, repetitive. (fatigue), pulse, or alternating). JOURNAL OF THE SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY 

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  • Using the Schmidt Hammer on Rock Mass Characteristic in

    The uniaxial compressive strength is one of important parameter to determine the shear strength of rock mass by the rock classifiion method. To determine uniaxial compressive strength used by a testing on laboratory or in practically can use t he index method, in this research, alternatively is to use Schmidt Hammer.

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  • Using the Schmidt Hammer on Rock Mass Characteristic in

    The uniaxial compressive strength is one of important parameter to determine the shear strength of rock mass by the rock classifiion method. To determine uniaxial compressive strength used by a testing on laboratory or in practically can use t he index method, in this research, alternatively is to use Schmidt Hammer.

    >>READ
  • The Schmidt Hammer in geomorphological research Andrew S

    Dec 1, 2006 The Schmidt Hammer, originally designed for testing the hardness of concrete in 1948, was first used in a geomorphological context in the 1960s. Readings of rock hardness have often been found to correlate well with other measures of rock character, such as uniaxial compressive strength and Young's 

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  • Original Schmidt Test Hammer Type L Compression Strength

    Product Code UTR0563 Original Schmidt Test Hammer Type L (Proceq)UTR0565 Rock CradleUTC3040 Calibration Anvil Standards ASTM D 5873 ISRM Suggested Method In rock mechanics, The Type L Original Schmidt (UTR0563 is commonly used for the classifii, Utest Material Testing Equipment.

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  • Correlating schmidt hardness with compressive strength and

    Schmidt hammer has increasingly been used worldwide as an index test for a quick rock strength and deformability characterization. The reason is mainly due to its rapidity and easyness in execution,

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  • Cutting of rock

    The strength of rock. When deterring the dredgebility of rock, distinction has to be made between the properties of intact rock and that of a rock mass. Depending on the fracture density of the rock the cutter will cut intact rock or break out rock blocks. In the first case the strength (tensile and compressive strength), 

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  • Tramac's Stationary Rockbreaker Boom Systems

    Tramac offers a wide range of Stationary Rockbreaker Boom systems for any appliion in the aggregate stone, quarrying and mining industries. Such hammers perform in an impact class of 5,000 ft.lbs (6,780 Joules) and will readily break a 1 meter boulder with a compressive strength of 20,000 to 30,000 psi (138 210 

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  • Mining Rock Mass Rating Edumine

    An online tool for calculating mining rock mass rating. uniaxial compressive test is preferred. Uniaxial Compressive Strength, > 250 MPa, 100 250 MPa, 50 100 MPa, 25 50 MPa, 5 25 MPa, 1 5 MPa, < 1 MPa. Rating JA1, 15, 12, 7, 4, 2, 1, 0. TOP Highly weathered walls, Slickensided surfaces or. Gouge < 5 mm 

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  • Estimating the Intact Rock Strength of a Rock Mass by PCTE

    unconfined compressive strength testing, Schmidt hammer, Equotip, and estimation by socalled 'simple means'. Estimation by of the IRS is by means of a unconfined compressive strength (UCS) test. . In figure 1a the estimated values of intact rock strength by 'simple means' field tests are plotted versus. UCS test values 

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  • A predictive model for uniaxial compressive strength of carbonate

    Uniaxial compressive strength (UCS) is considered to be one of the important parameters in rock engineering The results of the ANN model were also compared against the results of a regression model. The artificial neural network, carbonate rock, coefficient of determination, Schmidt hammer, Schmidt hardness,.

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  • Prediction of uniaxial compressive strength of intact rocks using

    Dec 23, 2015 Prediction of uniaxial compressive strength of intact rocks using ultrasonic pulse velocity and reboundhammer number. Levent Selçuk and Ultrasonic techniques are a simple, costeffective, portable and nondestructive approach for evaluating the uniaxial compressive strength (UCS) of rocks. However 

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  • Standardized Process for Filed Estimation of Unconfined DalSpace

    Unconfined Compressive Strength (UCS) is one of the most important measures of intact rock strength (Hoek & Martin, 2014). However, UCS tests can be time consuming to preform. The Leeb Hardness Test (LHT) can be used to estimate the UCS quickly in the field or laboratory environment to provide more samples and a 

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  • Evaluation of the ratio between uniaxial compressive strength and

    Schmidt rebound hammer (SRH) test has been used worldwide as an index test for estimating the compressive strength and deformation characteristics of intact rocks. Although there is a high correlation between the surface hardness and the uniaxial compressive strength (UCS) of intact rocks, the SRH provides only a 

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  • Chapter 4 Engineering Classifiion of Rock Materials USDA

    Hardness and unconfined compressive strength of rock materials. Method used to determine consistency or hardness (check one):. Field assessment: _____. Uniaxial lab test: _____. Other: ______ Rebound hammer (ASTM D5873): _____. * See NEH631.03 for consistency and density of soil materials. For very stiff soil, 

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  • Rock mechanics testing equipment, Controls

    Controls is specialized in rock mechanics testing equipment. Enter now and see all the products!

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  • Uniaxial Compressive Strength of Antarctic Peninsula Rocks

    Sains Malaysiana 46(5)(2017): 677–684 Uniaxial Compressive Strength of Antarctic Peninsula Rocks: Schmidt Hammer Rebound Test. (Kekuatan Mampatan Sepaksi Batuan Semenanjung Antartik : Ujian Pantulan Tukul Schmidt). GOH THIAN LAI*, NUR AMANINA MAZLAN, 

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  • using the point load test to determine the uniaxial compressive

    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, indextostrength conversion factors are used.

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  • 3.4 Schmidt hammer test The Schmidt hammer rebound test was

    compressive strength of rock material (ISRM. 1978a). Schmidt hammer. measurement areas. At least 20 individual tests were conducted on diese areas, separated by at least a plunger diameter, in which die longitudinal axis of the hammer was field or in the laboratory, on rock specimens that are in the form of a core, 

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  • Correlating schmidt hardness with compressive strength and

    Schmidt hammer has increasingly been used worldwide as an index test for a quick rock strength and deformability characterization. The reason is mainly due to its rapidity and easyness in execution,

    >>READ
  • Productivity of hydraulic breaker versus ripper (thickness of layer <

    where UCS is the uniaxial compressive strength, MPa, and I s (50) is the standardized load strength index. Rock classifiion hammer and point load tests were carried out under in situ conditions. The classifiion hammer test was made using irregular blocks of rock sample. These were extracted from the limestone 

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  • Analyzing Schmidt Hammer in Evaluating Compressive Strength of

    Schmidt Hammer comes in different types, the N and L are the most useful ones, though. In this study, the N and L types were used to determine compressive strength of rock mass in Emamzadeh Hashem Tunnel lot II. The uniaxial compressive strength of rock mass was calculated. The standards presented by ISRM and 

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  • Low Impact Digital Rebound Hammer For Concrete Compressive

    (Digital Rebound Hammer 1500, without Printer or Software). $2,147.00 James Instruments™ digital test hammers are an advanced, completely automated system for estimating concrete compressive strength. Paper and Film testing are a significant appliion for the Low Impact Manual Test hammer. Typically eight to 

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  • Utilization of the Brazilian test for estimating the uniaxial

    Uniaxial compressive strength (UCS) and shear strength parameters (cohesion and angle of internal friction, C and ϕ) of rocks are important parameters needed for block punch test, point load index, Schmidt hammer test etc) to estimate indirect tensile strength of rocks (Kilic and Teymen, 2008 Mishra and Basu, 2012).

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  • Predicting the unconfined compressive strength of the Inside Mines

    Compressive strength is the most widely used design parameter in the construction industry and in rock engineering. For example reported that mining engineers request the uniaxial compressive strength (UCS) more often than any other rock property. However .. which would break the sample into pieces or plates.

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  • The Role Of Ultrasonic Velocity And Schmidt Hammer Hardness

    the rock specimens was tested under nondestructive test and then followed by uniaxial compression test to assess the mechanical properties. It was found that good correlations established between the NDTs and the uniaxial compressive strength. The correlation between uniaxial compressive strength and rebound 

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  • Uniaxial compressive strength of Antarctic Peninsula rocks: Schmidt

    May 1, 2017 This paper presents the results of a systematic approach to determine the uniaxial compressive strength of rock material using the Schmidt hammer rebound test. A total of five distinct loions (Graham Coast, Davis Coast, Nanson Island, Danco Coast and Trinity Island) were tested using the Schmidt 

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  • ASTM D5873 14 Standard Test Method for Determination of Rock

    D5873 14 Standard Test Method for Determination of Rock Hardness by Rebound Hammer Method, core, hardness, impact hammer, rebound hammer, 4.3 This test method is of limited use on very soft rock or very hard rock, which is defined as having uniaxial compressive strengths less than approximately 1 MPa or 

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  • Estimating rock compressive strength from Rock Abrasion Tool (RAT

    Jun 7, 2013 rock strength and RAT grind energy for rocks with compressive strengths less than about. 150 MPa, a Just as a field geologist would use a rock hammer to cleave open rocks to .. placement of lower platen of the Instron instrument versus stress (MPa) calculated as force per unit area of the sample.

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  • Analyzing Schmidt Hammer in Evaluating Compressive Strength of

    Schmidt Hammer comes in different types, the N and L are the most useful ones, though. In this study, the N and L types were used to determine compressive strength of rock mass in Emamzadeh Hashem Tunnel lot II. The uniaxial compressive strength of rock mass was calculated. The standards presented by ISRM and 

    >>READ
  • Estimating rock compressive strength from Rock Abrasion Tool (RAT

    Jun 7, 2013 rock strength and RAT grind energy for rocks with compressive strengths less than about. 150 MPa, a Just as a field geologist would use a rock hammer to cleave open rocks to .. placement of lower platen of the Instron instrument versus stress (MPa) calculated as force per unit area of the sample.

    >>READ
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