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Elastic modulus evolution of rocks under heating–cooling
2020年8月14日· It was found that rock decay takes place in both heating and cooling processes, and dramatic modulus changes occurred near the α − β phase transition2017年10月30日· Static modulus of elasticity of concrete in axial compression is typically applicable at stresses up to 033fc [1] or 04f c [2], [3], that is, at the levels lower than theStressstrain relationships and modulus of elasticity of
Dynamic mechanical response characteristics and cracking
2023年5月24日· In this study, we utilized a twodimensional particle flow code (PFC2D) to investigate the dynamic compressive strength, peak strain, and dynamic elastic modulus2016年10月22日· The modulus ratio concept is considered to present a unified classification for intact rocks and rock masses Soil–rock boundary, standup time inModulus Ratio and Joint Factor Concepts to Predict Rock
Shape characteristics and crushed law of deep sandstone impact
2023年4月1日· In order to quantify the crushed rocks, Luo et al [19] investigated the dynamic compressive strength, dynamic crushing morphology and crushing energy2017年1月1日· Young modulus is one of a basic geomechanical parameters used for the defining of the phenomena in rock mass It is determined based on a uniaxialThe Methodology for the Young Modulus Derivation for
Assessment of the Rock Elasticity Modulus Using Four
2023年2月12日· In rock engineering, the rock elasticity modulus (EM) plays an important role for structure designs [1,2,3,4] The EM is an important index for quantifying the rock behavior It is also closely2023年2月7日· In the process of mining graphite mine, rock mass is often subjected to dynamic loads such as blasting or mechanical crushing, which involves dynamicDynamic response characteristics and damage rule of graphite ore
Mechanical behavior of hollow proppants based on finite element
2021年1月15日· The effects of the following parameters on embedment and crushing were analyzed: closure stress, distance coefficient, Young's modulus of rock and proppant, proppant size, and hollow structure The results show that the most sensitive environmental factor is the distance coefficient, followed by closure stress and Young's modulus of rock2018年12月1日· Thus, the value of the Weibull modulus can be taken as 324 Weibull distribution plots for singleparticle crushing tests (a) dn ¼ 25 mm; (b) dn ¼ 5 mm; (c) dn ¼ 10 mmEffects of particle size on crushing and deformation behaviors of
Experimental Investigation of the CompactionCrushing
2022年12月28日· The compaction and recrushing characteristics of quarry filling material are important factors which affect its filling effect and quality [1,2]As the gangue filling material is widelysourced, economical, and inexpensive, minefilling accounts for most of its use, and the gangue material as a filling body can account for a large amount of gangue,2015年6月4日· 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 0Compressive strength of rocks PetroWiki
On the measurements of individual particle properties via
2021年4月1日· For the latter, a random variable x, such as the Young's modulus, yield strength, or crushing strength of individual sand particles, is described by the Weibull law, with its cumulative distribution function (CDF) as (Weibull, 1951; Zhang et al, 2013): (5) F (x; λ, k) = 1 − exp [− (x / λ) k] where x ≥ 0 is a random variable; k > 0 is the shape parameter2017年1月1日· open access Young modulus is one of a basic geomechanical parameters used for the defining of the phenomena in rock mass It is determined based on a uniaxial compressive test According to the International Society of Rock Mechanics one may calculate it in three different ways as the tangent, secant and average modulusThe Methodology for the Young Modulus Derivation for Rocks and
Relationship between rock uniaxial compressive strength and digital
2021年1月3日· The rock uniaxial compressive strength (UCS) is the basic parameter for support designs in underground engineering In particular, the rock UCS should be obtained rapidly for underground engineering with complex geological conditions, such as soft rock, fracture areas, and high stress, to adjust the excavation and support plan and ensure2023年3月4日· To study the effects of confining pressure and joint material properties on stress evolution and fracture behavior of jointed rock mass under SHPB impact load, the numerical software LSDYNA and the indoor SHPB impact system are used to carry out experimental research on intact rock mass and jointed rock mass The peak stress,Study on Stress Evolution and Crushing Behavior of Jointed Rock
Effects of confining pressure on deformation failure behavior of
2022年4月29日· Abstract for a deeper understanding of the deformation failure behavior of jointed rock, numerical compression simulations are carried out on a rock specimen containing nonpersistent joints under confining pressure with the bondedparticle model The microscopic parameters which can reflect the macroscopic mechanical properties2017年10月30日· The modulus of elasticity of basalt rock, over 100 GPa, is four times that of granite rock (Table 8 and Fig 5) One can also assume that the fact that basalt does not contain quartz but it contains calcium plagioclase and magnesiumrich pyroxene and quartz is the dominant mineral in granite is not without influence on the microstructure of ITZStressstrain relationships and modulus of elasticity of rocks and
ScienceDirect Statistical models for estimating the uniaxial
2021年5月1日· As is known, the dynamic modulus of elasticity can be calculated from P and S wave velocity measurements 7 One of the important results revealed by this study is as follows Rock mechanics tests such as BTS, BPI, Is 50 can be performed with small but certain geometricshaped rocks2021年6月22日· To investigate the influence of the fissure morphology on the dynamic mechanical properties of the rock and the crack propagation, a drop hammer impact test device was used to conduct impactDynamic characteristics and fractal representations of crack
Investigation on crushing behavior and cumulative deformation
2023年7月1日· This investigation aims to explore the crushing behavior and cumulative deformation of slag under cyclic loading by both cyclic triaxial simulation tests through PFC50 3D and insitu vibration tests The particle crushing index K g was proposed to characterize the evolution of particle crushing of slag The negative exponential2003年6月1日· The model is based on the backanalysis of a comprehensive experimental program that included the direct measurement of the zone of crushing from 92 blasting tests on concrete blocks using two commercial explosives The concrete blocks varied from low, medium to high strength and measured 15 m in length, 10 m in width and 11 m inModelling the size of the crushed zone around a blasthole
IOP Conference Series: Materials Science and Engineering PAPER
tensile strength test, flexural strength test, modulus of elasticity and Poisson’s ratio The number of samples for each variable taken as many as 3 pieces The testing procedure refers to the American Society for Testing Materials ASTM C192 / C192M in 2007 The testing procedure refers to SNI 1974 in 2011, SNI 4431 in 2011 and SNI 2491 in 2014In this research, the deformation, particle crushing, and morphology evolution of saturated crushed gangue under variable axial stresses (0, 2, 4, 8, 12, 16, and 20 MPa) were investigated by performing a series of laboratory tests with our selfdesigned compacting device The research results showed that the relationship betweenParticle Crushing and Morphology Evolution of Saturated Crushed
Experimental Study on Dynamic and Static Rock Mechanical
2023年7月28日· The experimental cores are tight gas reservoir rock samples of the Sulige Gas Field, with average porosity of 8% and average permeability of 05 mD, which is typical tight sandstone (Figure 1)The samples were processed into standard cylindrical samples with diameter of 25 cm and length of 5 cm, which met the requirements of measuring2020年3月1日· The Weibull modulus is 324 for the rockfill materials in the singleparticle crushing test The characteristic stress Size effect on the crushing strengths of rock particles Rock and Soil Mechanics, 38 (8) (2017), pp 24252433 View in Scopus Google Scholar Cited by (0)Effects of particle size on crushing and deformation behaviors
Impact of mechanical resistance of aggregate on
2020年12月1日· Comparing correlations between modulus of elasticity of concretes and aggregate crushing resistance (r OC = 092; r HPC = 090) and correlations between modulus of elasticity and compressive strength of concretes (r OC = 059; r HPC = 054) one should emphasize much stronger impact of aggregate crushing resistance on theIn general, compared to intact rock, a rock mass has reduced tensile strength (almost zero), and reduced shear strength especi ally along discontinuity planes Furthermore, if a rock mass is cut by directional joint sets , the rock mass strength is anisotropic Rock mass strength is scale dependent and varies with the volume of rock underSTRENGTH PROPERTIES OF ROCKS AND ROCK MASSES