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STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES

between strain hardening and softening is called the unconfined compressive strength of the rock and is denoted as Co or qu. Failure takes place continuously from C to D during which ...احصل على السعر

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Determination of the Uniaxial Compressive Strength of

2022/12/1  The uniaxial compressive strength (UCS) is classified as one of the basic mechanical properties of rocks, which is widely used in mining and construction practice. For example, it allows ...احصل على السعر

A Review of the Tensile Strength of Rock: Concepts

2014/1/30  A review of the tensile strength of rock was conducted to determine the relationship between direct tensile strength (DTS) and Brazilian tensile strength (BTS) and to examine the validity of estimating tensile احصل على السعر

Correlation between unconfined compressive

2013/1/1  Compressive strength, tensile strength and the compression and tension ratio are important factors affecting the mechanical properties of rock (Fener et al., 2005; Nazir et al., 2013). At the same ...احصل على السعر

A Review of the Tensile Strength of Rock: Concepts

2014/1/22  A review of the tensile strength of rock was conducted to determine the relationship between direct tensile strength (DTS) and Brazilian tensile strength (BTS) and to examine the validity of ...احصل على السعر

Rock Strength - an overview ScienceDirect Topics

Rock strength is specified in terms of tensile strength, compressive strength, shear strength, and impact strength. In the context of fracture gradient, only the tensile strength of rock is of احصل على السعر

Frontiers A new method for determining strength parameters of rock

2023/9/14  Some scholars also use laboratory and field hydraulic fracturing tests to determine rock tensile strength values (Wang Y.-J. et al., 2020). ... After relationship fitting, the احصل على السعر

Determination of the Uniaxial Compressive Strength of Rocks

2022/12/1  Uniaxial compressive strength (UCS) and Brazilian tensile strength (BTS) of the rock material are important engineering parameters in designing of surface and underground احصل على السعر

State-of-the-art review of the rock strength criteria and rock strength ...

State-of-the-art review of the rock strength criteria and rock strength experiments subjected to different tensile-compressive stress states: HE Pengfei1，2，3，HE Manchao1，LI احصل على السعر

A simple method to estimate tensile strength and Hoek

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 احصل على السعر

Strength criterion for rocks under compressive-tensile stresses and

2015/8/1  Numerous tests have been carried out to determine the strengths of rocks under confining pressure (CP), as rocks in-situ are usually under compression state. ... σ S σ C = 1 + احصل على السعر

Rock Mechanics - University of Notre Dame

Compressive Strength!! Tensile strength = resistance to failure under tensile stress ! Typically much lower than compressive strength • 10% of compressive strength typical (Table 7.2) ! احصل على السعر

Comprehensive compressive-tensile strength criterion for

Abstract: This paper presents a strength criterion for intact rock, which can well describe triaxial test data under compressive or tensile stress state. The proposed criterion is defined in terms ...احصل على السعر

Determination of c and Φ of rocks from indirect tensile strength

2014/1/1  (1): Fig. 4 Gypsum properties for the tested samples included online data (Papadopoulos et al. 1994) The results show a linear increase of tensile strength with احصل على السعر

Predicting the Uniaxial Compressive and Tensile Strengths of

2011/11/2  Uniaxial compressive and tensile strengths are considered key properties for characterising rock material in engineering practice. They are determined, directly and احصل على السعر

Rock Tensile Strength - an overview ScienceDirect Topics

A rock fails when the surrounding stress exceeds its tensile, compressive, or shear strength, whichever is reached first. There are several failure types depending on rock lithology, rock احصل على السعر

Comprehensive compressive-tensile strength criterion for

Abstract: This paper presents a strength criterion for intact rock, which can well describe triaxial test data under compressive or tensile stress state. The proposed criterion is defined in terms ...احصل على السعر

Determination of c and Φ of rocks from indirect tensile

2014/1/1  (1): Fig. 4 Gypsum properties for the tested samples included online data (Papadopoulos et al. 1994) The results show a linear increase of tensile strength with unconfined compressive strength and ...احصل على السعر

Predicting the Uniaxial Compressive and Tensile Strengths of

2011/11/2  Uniaxial compressive and tensile strengths are considered key properties for characterising rock material in engineering practice. They are determined, directly and احصل على السعر

Rock Tensile Strength - an overview ScienceDirect Topics

A rock fails when the surrounding stress exceeds its tensile, compressive, or shear strength, whichever is reached first. There are several failure types depending on rock lithology, rock احصل على السعر

Rock Strength (Shear strength, compressive strength,

1-F Rock Strength Nevertheless Tensile Strength Tensile strength (T o) is extremely difficult to measure: it is direction-dependent, flaw-dependent, sample size-dependent, ... An indirect احصل على السعر

A new method for determining strength parameters of rock

2023/9/15  This method can provide a new way to determine rock strength parameters in real time. KEYWORDS digital drilling technology, tensile strength, analytical model, cutting احصل على السعر

Determining Tensile Strength of Rock by the Direct Tensile,

2021/6/3  Among them, σ dt, σ st, and σ bt are the tensile strength of the rock under direct tensile, Brazilian splitting, and three-point bending, respectively; E t is the elastic modulus; P is احصل على السعر

Correlation between the tensile to compressive strength

of tensile and compressive strength. The tensile strength of the rock is generally obtained by the Brazilian splitting test, and the compressive strength is obtained by the uniaxial compression احصل على السعر

Tensile strength prediction of rock material using non

2021/11/1  Tensile strength of rock plays a significant role in the design of tunnels and underground engineering projects. Due to the inefficiency of direct method in determining rock احصل على السعر

(PDF) Strength of intact rock and rock masses - ResearchGate

2000/1/1  A regression analyis of the entire data base provides a model to allow the triaxial strength of an intact rock to be estimated from reliable measurement of its uniaxial tensile and احصل على السعر

Using the point load test to determine the uniaxial compressive ...

2000/8/1  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 احصل على السعر

Rock mass properties - Rocscience

jointed rock masses, three ‘properties’ of the rock mass have to be estimated. These are: ξ uniaxial compressive strength of the intact rock pieces, ξ value of the Hoek-Brown constant for احصل على السعر

Splitting Tensile Strength Test (Brazilian) - Geoengineer

The tensile strength of rock materials is an important parameter in designing a geotechnical project since it is significantly lower than the rocks’ compressive strength. This phenomenon is احصل على السعر

Reverse Size Effect of the Unconfined Compressive Strength of ...

2024/11/16  Due to the size effect, it is essential to first determine the mechanical parameters of experimental-scale rocks and then select appropriate models to extrapolate to احصل على السعر