compressive strength of a rock



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Strength criterion for rocks under compressive

Clearly, the magnitude T of UTS is an independent parameter for rock to be determined from test; and it is impossible to describe strength for all rocks under compressive-tensile stresses by simply extending a criterion that is optimized from compression test data...

Compressive strength

Compressive strength or compression strength is the capacity of a material or structure to withstand loads tending to reduce size, as opposed to tensile strength, which withstands loads tending to elongate In other words, compressive strength resists compression ....

Compressive strength of basalt rock

Uniaxial Compressive Strength of Composite Rock Material - Ejge The uniaxial compressive strength of intact rock specimen of homogenous and isotropic rocks such as granite, sandstone, basalt and etc had been well ....

Rock mechanical properties

Compressive strength of rocks Compressional and shear velociti Acoustic velocity dispersion and attenuation Rock acoustic velocities and porosity Rock acoustic velocities and pressure Rock acoustic velocities and temperature Rock acoustic velocities and in-situ stress PEH:Acoustic_Logging...

Uniaxial compression tests

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 ISRM 1999, Draft ISRM suggested method for the complete stress-strain curve for intact rock in uniaxial compression...

Compressive strength of rocks

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 many ....

Mining Rock Mass Rating

An online tool for calculating mining rock mass rating EduMine - Professional Development and Training for Mining and the Geosciences , Strength of Intact Rock Material ( see Field Estimates) Point-Load Strength Index >10 MPa , **Rocks with a unixaial compressive strength below 25 Mpa are likely to yield highly ambiguous ,...

Rock Testing

Testing Carried out in accordance with International Society for Rock Mechanics (ISRM) Standards and other recognised standards Compressive Strength of Rock cor Diamond core drilling for provision of test cores; Density of concrete specimen...

ROCK STRENGTH AND ITS MEASUREMENT

Compressive Strength Intact rock 3-34 Slake Durability to Estimate Rate of Weathering 3-35 Point Load Test to Estimate Compressive Strength 3-36 LESSON 3 - ROCK STRENGTH and Its MEASUREMENT Learning Outcomes -...

Laboratory Uniaxial compression test

Sep 28, 2015· Laboratory Uniaxial compression test - Rock Mechanics - Granit - Result: 160MPa...

Rock Failure Topics

Key Points 1 When rock fails in compression, the compressive stress exceeds the compressive strength 2 Even poorly-consolidated sands are characterized by ,...

Some Useful Numbers

Some Useful Numbers on the Engineering Properties of Materials (Geologic and Otherwise) GEOL 615 Coefficient of sliding friction ( ) , Field test for compressive strength of soils and rocks Term Diagnostic features Undrained compressive strength...

Piles Capacity

Figure 2: Relationship between compressive strength of weak rock and end bearing capacity (Zhang, 2004; after Zhang and Einstein, 1998) Piles Capacity Reference Manual...

uniaxial compressive strength

The uniaxial compressive strength (UCS) is the maximum axial compressive stress that a right-cylindrical sample of material can withstand before failing It is also known as the unconfined compressive strength of a material because confining stress ,...

11 Rock mass properties

164 Chapter 11: Rock mass properties , ** Point load tests on rocks with a uniaxial compressive strength below 25 MPa are likely to yield highly ambiguous results Intact rock properties 167 Table 113: Values of the constant mi for intact rock, by rock group Note that values in...

Estimating thestrength ofrock materials

axial compressive strength of rock materials hasbeendeveloped tosuch adegreeofreliability that standard-ized test procedures have been pre-pared7, andtheloading apparatus is commercially available However, theequipment issimple tomake, as canbeseenfrom Plate I Broch andFranklin proposed5 the...

Rock properties

Rock hardness is a term used in geology to denote the cohesiveness of a rock and is usually expressed as its compressive fracture strength Terms such as hardrock and softrock are used by geologists to distinguishing between igneous/metamorphic and sedimentary rocks, respectively...