Uniaxial Compressive Strength Determination of Rocks Using X-ray ...
The uniaxial compressive strength (UCS) is an important parameter for rock mass classification and rock engineering designs. This study proposes a novel method for predicting the UCS of rocks using X-ray computed tomography and convolutional neural networks. First, X-ray CT scanning was conducted on five mudstone specimens. The volume data characteristics …
اقرأ أكثرUnconfined Compression Test | Geoengineer.org
In particular, the Uniaxial Compressive Strength is re-calculated as: σ c = σ UCS / (0.88 + 0.222*(D/L) ) Where σ c is the corrected uniaxial compressive strength. Rock characterization and typical range of UCS based on rock types . Based on their Uniaxial Compressive Strength, rocks can be characterized from very weak to very strong as ...
اقرأ أكثرDetermination of the uniaxial compressive strengths of …
Determination of the uniaxial compressive strengths of rocks Yu. M. Kartashov, Yu. D. Mazur-Dzhurilovskii & A. A. Grokhol'skii Soviet Mining 6, 339–341 ( 1970) Cite this article 37 Accesses 7 Citations Metrics Download to read the full article text Additional information All-Union Scientific-Research Mine Surveying Institute (VNIMI), Leningrad.
اقرأ أكثرUnconfined Compression Test | Geoengineer.org
In particular, the Uniaxial Compressive Strength is re-calculated as: σ c = σ UCS / (0.88 + 0.222*(D/L) ) Where σ c is the corrected uniaxial compressive strength. Rock characterization and typical range of UCS based on rock …
اقرأ أكثرSuggested methods for determining the uniaxial compressive strength …
DOI: 10.1016/0148-9062(79)91450-5 Corpus ID: 111836260; Suggested methods for determining the uniaxial compressive strength and deformability of rock materials: Part 1. Suggested method for determination of the uniaxial compressive strength of rock materials
اقرأ أكثرDetermination of uniaxial compressive strength of …
This paper presents a new laboratory test for estimating the uniaxial compressive strength (UCS) of rocks single particles or rock cuttings. Sample preparation procedures and methods of research are as follow: − As many as 10 block samples of microcrystalline limestone from Asmari formation outcrops with dimensions of 20×20×40 cm 3 were …
اقرأ أكثرEstimating Rock Mass Strength - BM 1997 02 - University …
The uniaxial compressive strength for the rock mass, σc, rockmass, can be expressed by setting σ3 = 0 in Equation 2.1 thus obtaining σc, rockmass =σc s . (2.2) The uniaxial tensile strength of the rockmass, σt, rockmass, can be found by setting σ1 = 0 in Equation 2.1, thus yielding c (m m s) t 4 2 2, rockmass = − + σ σ . (2.3)
اقرأ أكثرSuggested methods for determining the uniaxial compressive strength …
CALCULATIONS (a) The uniaxial compressive strength of the specimen shall be calculated by dividing the maximum load car- ried by the specimen during the test, by the original cross-sectional area. 1. SCOPE This method of test is intended to determine stress- strain curves and Young's modulus and Poisson's ratio in uniaxial compression of a rock ...
اقرأ أكثرCompressive strength of rocks - PetroWiki
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 …
اقرأ أكثرDetermining Compressive Strength of Rock
The results of breaking 375 samples of four rock types are shown in figure 3. Examination of the graphs shows no apparent effect on compressive strength and scatter of data for either head due to nonparallelism up to …
اقرأ أكثرDetermination of Uniaxial Compressive Strength of Granite Rock …
The uniaxial compressive strength (UCS) is one of the most important design parameters in a rock engineering projects and it should be determined as a …
اقرأ أكثرDetermining Compressive Strength of Rock
The average compressive strength and standard deviation were found to be 15,707 psi and 398 psi, respectively. Analysis of the data proves that the compressive strength of marble is not influenced by steel end platen size or thickness. Similarly, low standard deviation and lack of trend occurred for the other three rock types.
اقرأ أكثرDETERMINATION OF UNIAXIAL COMPRESSIVE STRENGTH …
Uniaxial Compressive Strength (UCS) defines mechanical strength of the intact rock material and it is one of the most used parameters in rock engineering. In the laboratory, it is determined by uniaxial compression on circular cylinder specimens according to standardized test procedures [1, 2].
اقرأ أكثرEmpirical Estimation of Uniaxial Compressive Strength of Rock…
Empirical relationships for estimating Uniaxial Compressive Strength (UCS) of rock from other rock properties are numerous in literature. This is because the laboratory procedure for determination of UCS from compression tests is cumbersome, time consuming, and often considered expensive, especially for small to medium-sized mining engineering …
اقرأ أكثر(PDF) Determination of uniaxial compressive strength of …
Abstract:As a key parameter in the traditional and universal Hoek-Brown (HB)failure criterion,the uniaxial compressive strength of intact rock has a strong correlation with the parameters of ...
اقرأ أكثرThe Uniaxial Compressive Strength of Soft Rock
Abstract and Figures. 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 ...
اقرأ أكثرValidity of uniaxial compression tests for indirect determination …
Validity of uniaxial compression tests for indirect determination of long term strength of rocks International Journal of Mining and Geological Engineering, 1988 Hany HELAL
اقرأ أكثرThe determination of uniaxial compressive strength from point …
Application of point load index test to strength determination of rock and proposals for new size-correction chart. D.A. Summers (Ed.), ... Estimation of uniaxial compressive strength of rock materials by index tests using regression analysis and fuzzy inference system. Eng. Geol (2013), 10.1016/j.enggeo.2013.04.004.
اقرأ أكثرPrediction of Uniaxial Compressive Strength of Rock Via Genetic ...
Reasonable and effective determination of uniaxial compressive strength (UCS) is critical for rock mass engineering stability research, design, and construction. To estimate the UCS of rock simply, conveniently, and accurately, a selective ensemble learning technology is introduced here based on modern artificial intelligence research, and a …
اقرأ أكثرIS 9143 (1979): Method for the determination of unconfined …
METHOD FOR THE DETERMINATION OF UNCONFINED COMPRESSIVE STRENGTH OF ROCK MATERIALS 0. FOREWORD 0.1 This Indian Standard was adopted by the Indian Standards Inrtitu- tion on 23 March 1979, after the draft finalized by the Soil Engineering and Rock Mechamcs Sectional Committee had been approved by the
اقرأ أكثرRock mass properties - Rocscience
Brown failure criterion for jointed rock masses is defined by: (1) where and are the maximum and minimum effective principal stresses at failure, is the value of the Hoek-Brown constant m for the rock mass, s and a are constants which depend upon the rock mass characteristics, and is the uniaxial compressive strength of the intact rock pieces. a
اقرأ أكثرUniaxial Compression Mechanical Properties of Rock Samples in ... - Hindawi
Figure 4 shows the results of uniaxial compression test with a thickness ratio of 1 : 1 for composite rock samples. It could be seen from Figure 4 that the strength and elastic modulus of the hard rock are the highest, followed by …
اقرأ أكثرSUGGESTED METHODS FOR DETERMINING THE UNIAXIAL COMPRESSIVE STRENGTH …
Part 1. Suggested method for determination of the uniaxial compressive strength of rock material. Part 2. Suggested method for determining deformability of rock materials in uniaxial compression. In each case the scope, apparatus, procedure, calculations and reporting of results are dealt with. The suggested methods were prepared in 1978.
اقرأ أكثرDETERMINATION OF UNIAXIAL COMPRESSIVE …
Uniaxial Compressive Strength (UCS) defines mechanical strength of the intact rock material and it is one of the most used parameters in rock engineering. In the laboratory, it is determined by uniaxial compression on circular cylinder specimens according to standardized test procedures [1, 2].
اقرأ أكثرdetermination uniaxial compressive strength of rocks
Determination of c and φ of rocks from indirect tensile . Cohesion c and friction φ angle are the two key parameters required in numerical simulations and designs of underground openings excavations and foundations in rocks The paper discusses a simple method based on a theoretical framework to determine the two parameters from uniaxial compression test and …
اقرأ أكثرEstimation of Uniaxial Compressive Strength of Clay-bearing Weak Rocks ...
The uniaxial compressive strength of rock materials, that is most often used in rock engineering applications and rock mass classification systems such as RMR (Bieniawski, 1989), is one of the important mechanical properties Except for concrete in which cube samples are usually used for determination of its strength, uniaxial compressive strength of rock …
اقرأ أكثرThe determination of uniaxial compressive strength from point …
The uniaxial compressive strength–point load index relation was studied for pyroclastic rocks. • Very strong exponential relations were found uniaxial compressive strength and point load index. • The results were compared to the studies in the literature.
اقرأ أكثرUniaxial Compressive Strength Determination of Rocks Using …
The uniaxial compressive strength (UCS) is an important parameter for rock mass classification and rock engineering designs. This study proposes a novel method for predicting the UCS of rocks using X-ray computed tomography and convolutional neural networks. First, X-ray CT scanning was conducted on five mudstone specimens. The volume data characteristics …
اقرأ أكثرEnergy Dissipation-Based Method for Strength Determination of Rock ...
The energy conversion in rocks has an important significance for evaluation of the stability and safety of rock engineering. In this paper, some uniaxial compression tests for fifteen different rocks were performed. The evolution characteristics of the total energy, elastic energy, and dissipated energy for the fifteen rocks were studied. The dissipation energy …
اقرأ أكثرUniaxial compression test - Tononeng
The Uniaxial Compression Test, or also uniaxial test or simply uniaxial test, is a test that allows to characterize the strength of a rock and is standardized according to the ASTM-D7012 standard. The uniaxial compression test complies with test methods C and D of the ASTM-D7012 standard; it can in fact be conducted in two ways:
اقرأ أكثر(PDF) Determination of Uniaxial Compressive …
Determination of Uniaxial Compressive Strength of Granite Rock Samples using Electrical Resistivity Measurement: NDT April 2019 DOI: 10.3997/2214-4609.201900452
اقرأ أكثرEmpirical Correlation of Uniaxial Compressive Strength and …
The uniaxial compressive strength (UCS) of intact rock was measured by using apparatus DHR 2000 exhibited in Figure 2. The test is intended to measure the UCS value of rock material
اقرأ أكثرUSING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL …
the uniaxial compressive strength (UCS), and to propose appropriate Is50 to UCS conversion factors for different coal measure rocks. The rock strength determined by the PLT, like the load frame strengths that they estimate, are an indication of intact rock strength and not necessarily the strength of the rock mass. THE UNIAXIAL COMPRESSIVE ...
اقرأ أكثرTriaxial Compression Test in Rock | Geoengineer.org
where σ ci is the uniaxial compressive strength, m i is a constant based on the rock type, σ 1 and σ 3 are the principal stresses. After conducting at least 3 triaxial tests in different lateral pressures, the best-fit envelopes of the criterion selected are plotted and the parameters of each one (cohesion, friction angle in M-C and m i, σ ...
اقرأ أكثرSimple Guide to ASTM D7012: Testing Intact Rock Core Specimens …
This requires sampling the proper dimensions: Minimum diameter: 47 millimeters (mm) Size: 10 times larger than the biggest mineral grain. Length to diameter ratio (L/D): 2.0 – 2.5. Before testing, the lab needs to level the rock core specimen's cylindrical ends within a 0.02 mm tolerance and not stray from perpendicularity by more than 0.06 ...
اقرأ أكثرUniaxial Compressive Strength - an overview
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.
اقرأ أكثرDetermination of Uniaxial Compressive Strength of Granite Rock …
Summary The uniaxial compressive strength (UCS) is one of the most important design parameters in a rock engineering projects and it should be determined as a prerequisite for geotechnical studies. Since direct determination of geomechanical properties of rocks are usually expensive, time consuming and only capable in local geomechanical properties …
اقرأ أكثرEnergy Dissipation-Based Method for Strength …
The energy conversion in rocks has an important significance for evaluation of the stability and safety of rock engineering. In this paper, some uniaxial compression tests for fifteen different rocks were performed. The …
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