• comparison of geomechanical properties of white rock salt and pink

    the series of youngest rock salt. On the grounds of the research on strength and strain parameters (uniaxial compressive and ten . Macrodylatancy threshold. Linearity limit of axial strain. Rocksalt. Compressive strength. Rc. [MPa] σd. [MPa] σd/Rc. [%] σlo. [MPa] σlo/Rc. [%]. Tensile strength. Rr. [MPa]. Average value.

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  • correlation between unconfined compressive strength and indirect

    Design Process in rock is very tedious because of its different nature compared to other engineering materials due to its distinct joint conditions like orientation, roughness, loion & frequency affect the strength of jointed rock. Experimenting indirect tensile strength is very fast comparing with unconfined compressive 

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  • Strength of jointed rock masses Rocscience

    such as salt or potash. Joints are a particular type of geological Strength, in the context of these notes, refers to the maximum stress level which can be carried by a specimen. No attempt is made to . confining pressure c σ is the uniaxial compressive strength of the intact rock material from which the rock mass is made up 

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  • Compressive strength of rocks PetroWiki

    Jun 4, 2015 While many methods for calculating failure relationships exist, an initial measure of the compressive strength of reservoir rocks is still needed for use in those . With a general relationship available for uniaxial compressive strength and the compaction limit, rock failure envelopes can be determined for 

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  • the effect of salt in concrete on compressive strength, water vapor

    May 8, 2011 The purpose of this investigation was to determine the effects of sodium chloride and seawater salts separately in concrete. The investigation covered the effects of salt on the compressive strength and water vapor transmission (WVT) of concrete, as well as the corrosive effects of salt on mild reinforcing 

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  • SelfHealing Characteristics of Damaged Rock Salt under MDPI

    Aug 12, 2013 (2) Making the initial damage. The rock salt specimens were placed on a uniaxial compression test machine with maximum uniaxial load stress of 30 MPa (average uniaxial compressive strength of square rock salt specimens is about 45.23 MPa the average yield strength is 15.37 MPa). After loading, the 

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  • Degradation and improvement of mechanical properties of rock

    Feb 4, 2017 (2013) showed that the strength of rock salt can. increase up to 171% after a certain number of cyclic. loading during triaxial compressive testing. Apart from peak strength, Young's modulus, E, and. Poisson's ratio,, behave differently depending on. specifiions of cyclic loading (Eberhardt et al. 1999).

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  • Chapter 2: Principles of Drilling and Excavation Boston University

    Shear strength, also called compressive strength, is the maximum compressive stress that a rock can sustain. . where εf is the strain at rock failure, and UCS is the Uniaxial Compressive Strength. In a lab test .. Creep Tests. Salt and ductile shales exhibit timedependent deformation when subjected to significant.

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  • Different Methods to Evaluate Strength from Compression Tests for

    The axial stress of rock salt was analyzed by four methods based on initial crosssectional area, corrected crosssectional area according to engineering strain, logarithmic strain and volume deformation. Results show that the peak stress and strain determined were different for each method. The peak stress and strain 

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  • Effects of Loading Rate on Strength and Deformability of Rock Salt

    Abstract The objective of this study is to determine effects of loading rate on compressive strength and deformability of the Maha Sarakham salt under elevated temperatures. The effort is aimed at determining the safe maximum withdrawal rates for th.

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  • D701214e1 Standard Test Methods for Compressive Strength and

    D7012 14e1 Standard Test Methods for Compressive Strength and Elastic Moduli of Intact Rock Core Specimens under Varying States of Stress and Temperatures, bulk modulus, compression These test methods do not include the procedures necessary to obtain a stressstrain curve beyond the ultimate strength.

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  • appendix 3 rockmass.net

    for the use of fullface tunnel boring machines (TBM) rock properties such as compressive strength, hardness, anisotropy are often Limestone, dolomite, marble, rock salt, gypsum. Mica schist, chlorite . The uniaxial compressive strength of the rock constitutes the highest strength limit of the actual rock mass. ISRM (1981) 

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  • Experiments on mechanical properties of salt rocks under cyclic

    Apr 9, 2012 Testing results show that, under monotonic loading, the uniaxial compressive stress (UCS) of glauberite is the largest (17.3 MPa), while that of rock salt is the smallest (14.0 MPa). The UCSs of thenardite and gypsum are 16.3 and 14.6 MPa, respectively. The maximum strain at the peak strength of rock salt 

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  • the effect of salt in concrete on compressive strength, water vapor

    May 8, 2011 The purpose of this investigation was to determine the effects of sodium chloride and seawater salts separately in concrete. The investigation covered the effects of salt on the compressive strength and water vapor transmission (WVT) of concrete, as well as the corrosive effects of salt on mild reinforcing 

    Read more
  • An investigation of failure modes and failure criteria of rock in

    Szwedzicki (2007) asserted that the variations in uniaxial compressive strength values of samples from the same lithology depend on the failure mode. . Su and Fu (2014) showed that for sandstone, splitting occurred under uniaxial compression the maximum shear stress at failure increased with increasing confining 

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  • Compressive failure of rocks by shear faulting Wiley Online Library

    Oct 10, 1998 model uses a twoparameter Weibulltype shear strength distribution for defining the nucleation of initial damage, eclogite, gabbro, aplite, rock salt, sandstone, dunite, limestone, and marble, and the predicted failure envelopes nearly parallel with the maximum compressive stress. [Tapponier and Brace 

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  • Study on Dynamic Compressive Mechanical Properties and Failure

    Uniaxial compression tests were performed on saltrock by), studying the relationship between the nonlinear deformation stage and the thermomechanical feature. studied the physical and mechanical properties of limestone and granite under different temperatures, and pointed out that the tensile strength of rocks 

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  • Effects of Loading Rate on Strength and Deformability of Rock Salt

    Abstract The objective of this study is to determine effects of loading rate on compressive strength and deformability of the Maha Sarakham salt under elevated temperatures. The effort is aimed at determining the safe maximum withdrawal rates for th.

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  • Correlation between Uniaxial Compressive Strength and Point Load

    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 

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  • Determination of Damage Constitutive Behavior for Rock Salt Under

    Nov 27, 2014 A damage constitutive model of rock salt is determined on the basis of acoustic emission characteristics, which could reflect the strength and deformation characteristics before the peak strength. Keywords: Acoustic emission, damage constitutive model, rock salt, uniaxial compression. 1. INTRODUCTION.

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  • Study on Mechanical Features of Brazilian Splitting Fatigue Tests of

    May 26, 2016 The results show that the fatigue limit load ratio and tensile fatigue strength are in negative correlation with cyclic number [3]. Erarslan and Williams had studied splitting test on rocks of preexisting crack and analyzed the fracture mode of the fatigue damage [4]. Salt rock can be used as underground storage 

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  • Mechanical Properties of Bedded Rock Salt

    specimens, when the loading stress reaches the peak stress, axial strain of rock salt is the largest, bedded rock salt is about 0.74 times of the rock salt. Under the same stress level, the deformation of salt rock is a lot bigger than mudstone, uniaxial compressive strength of mudstone is slightly bigger than rock salt. When.

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  • 33 Effects of Sodium Chloride Solutions on Compressive Strength

    concentrations of 5% and 10% on compressive strength of concrete cubes containing 5% rice husk ash (RHA). Concrete cubes containing 5% concrete, compressive strength. Introduction. Sodium chloride or rock salt could be used crushed granite of 20mm maximum size. The fine and coarse aggregates grading are.

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  • Experimental investigation and constitutive model for lime mudstone

    Sep 21, 2016 Lime mudstone samples used in the tests were obtained from the roof stratum of a salt mine in Huai'an, Jiangsu, China. . where σ1c is the axial peak stress, σ3 is the confining pressure, σ0 is usually regarded as the uniaxial compression strength of rock sample, and k is a material constant. σ0 and k are 

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  • Prediction of Uniaxial Compressive Strength (UCS) ijaist

    compressive strength (UCS) and indirect tests on the same rock. In the present study, efforts were made to make such correlations for Sakesar Limestone of. Central Salt Range. In the study cored rock specimens were tested for UCS tests, Point Load tests (PLT) and. Schmidt Rebound Hammer Tests (SRHT). All the.

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  • Effect of temperature on compressive and tensile strengths of salt

    May 14, 2012 the maximum storage volume and pressure7–9. The objective of this study is to develop a multi axial strength criterion for rock salt under various temperatures and confining pressures. The validity of the proposed criterion is verified by the results of uniaxial and triaxial compressive strength and. Brazilian 

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  • Experiments on mechanical properties of salt rocks under cyclic

    Apr 9, 2012 Testing results show that, under monotonic loading, the uniaxial compressive stress (UCS) of glauberite is the largest (17.3 MPa), while that of rock salt is the smallest (14.0 MPa). The UCSs of thenardite and gypsum are 16.3 and 14.6 MPa, respectively. The maximum strain at the peak strength of rock salt 

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  • PHYSICAL PROPERTIES OF SALT ANHYDRITE, AND GYPSUM

    Density of anhydrite, gypsum, and halite rocks at ordinary . P the maximum compressive yield strength will not be > 500 kg/cm «. Ihese results .. 20. Table 5.—Continued. Character of deposit. Loion. Density. Beference dark salt rock salt anhydrite gypsum rock salt. Grand Saline salt dpm/e, Texas. 2.222.25. 2.12A.

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