uniaxial compressive strength of rock

 

Uniaxial compressive strength of intact rock is an important mechanical parameter required for the design of geotechnical, mining engineering and petroleum reservoir projects. In geotechnical and mining projects, rock cores are usually available to be tested for such purposes. In the petroleum reservoirs, however, the ...…

There has been a lot of interest in the relationship between uniaxial compressive strength (UCS) and other properties of rock. Evaluation of rock parameters such as cohesion, Young's modulus, angle of friction, and Poisson's ratio is required for numerical modeling of rock. Finding empirical relations between these ...…

Original scientific paper. In certain engineering tasks of preliminary nature there is a need for an estimation of important physical and mechanical properties such as uniaxial compressive and tensile strength. This paper analyzes the problems related to the assessment of uniaxial compressive and tensile strength of rock ...…

The present paper deals with the uniaxial compressive and tensile behaviour of Chunar sandstone and Makrana marble at sub-zero temperature ( O°Cto -20°C) in dry and wet conditions. It was found that uniaxial compressive and tensile strengths of these rocks increased with decrease in temperature below. O°e.…

17 Mar 2017 ... 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 ...…

25 May 2015 ... Author Alexei Kesonen. Title of thesis Mechanical properties of Finnish rocks based on uniaxial compressive strength and tensile strength tests. Degree programme Structural Engineering and Building Technology. Major Foundation and Rock Engineering. Code IA3028. Thesis supervisor Professor Mikael ...…

The unconfined compressive strength (UCS) of rock is a basic parameter for the design of foundations resting on rock. However, it is often very difficult to retrieve intact rock core specimens for the UCS test due to mechanical breaking or natural fracturing of the rock core during the drilling process. In such cases, it becomes ...…

What is the difference between unconfined compressive strength and uniaxial compressive strength of rock? Uniaxial compressive strength is the ultimate compressive stress of the rock specimen failure under uniaxial compression conditions. Unconfined compressive strength means that the strength of a rock or soil ...…

The triaxial strength of rock can be estimated for most practical purposes from empirical strength criteria. Two such criteria are proposed that allow estimation of the triaxial strength for rock materials to about 10per cent. The only input required for these criteria isthe uniaxial compressive strength. The validity of the practical ...…

Sains Malaysiana 46(5)(2017): 677–684 http://dx.doi.org/10.17576/jsm-2017-4605-01. 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, ...…

jointed rock masses, three 'properties' of the rock mass have to be estimated. These are: • uniaxial compressive strength ci σ of the intact rock pieces,. • value of the Hoek-Brown constant i m for these intact rock pieces, and. • value of the Geological Strength Index GSI for the rock mass. Intact rock properties. For the intact ...…

Determination of rock engineering properties is important in civil, mining and geotechnical engineering. Uniaxial. Compressive Strength (UCS) is one of the most important properties of rocks. Point Load Test (PLT) is practically used in geotechnical engineering to determine rock strength index. Despite that the PLT is fast, ...…

Uniaxial compressive strength (UCS) is one of the most important parameters of rocks that is routinely used in rock engineering designs. This parameter is influenced greatly by textural properties of rocks; hence it is possible to estimate it from quantified texture coefficient (TC). In this paper, fourteen different types of rocks ...…

macrocracking takes place as the rock becomes more deteriorated and crack coalescence takes place. Various authors have compiled the values of the unconfined compressive strength for different rock types (Balmer, 1953; Johnson and DeGraff, 1988; Hatheway and Kiersch, 1989; Goodman,. 1989; etc..). Typical values ...…

Soft rock is a term that usually refers to a rock material with a uniaxial compressive strength (UCS) less than. 20 MPa. This low strength range might be influenced by physical characteristics, such as size, saturation, weathering and mineral content. A number of uniaxial compression tests have been conducted onto soft rock.…

4 Jun 2015 ... General rock failure criterion can be reduced to a few parameters dependent on lithology (m) and the uniaxial compressive strength (C0). 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 C0. C0 can be ...…

Abstract. Nine rock types including Sandstone, Limestone, Siltstone, Dolomite and Marl collected from six different rock formations of the Salt Range area of Pakistan were tested to evaluate the correlations between the uniaxial compressive strength and the corresponding values of the point load index. Two hundred rock ...…

5.2 Method C, uniaxial compressive strength of rock is used in many design formulas and is sometimes used as an index property to select the appropriate excavation technique. Deformation and strength of rock are known to be functions of confining pressure. Method A, triaxial compression test, is commonly used to ...…

2 Sep 2014 ... Strength properties of reservoir rocks play an important role in oil drilling and production. Meanwhile, uniaxial compressive strength is a decisive parameter in the gas and oil drilling. Considering that the uniaxial compressive strength is affected by many parameters, such as fracture and porosity, it can ...…

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 conversion factors are used.…

Examples of standards. 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.…

[Geology, Geophysics, Formation Evaluation]. A measure of a material's 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 ...…

2.1 ASTM Standards. C 1231 Practice for Use of Unbonded Caps in Determination of Compressive. Strength of Hardened Concrete Cylinders. D 2216 Test Method for Laboratory Determination of Water (Moisture). Content of Soil and Rock. D 2938 Standard Test Method for Unconfined Compressive Strength of Intact.…