effect of sizes on strength of granite rock  mining

effect of sizes on strength of granite rock mining

Nov 09, 2018 · It is known that an increase in the ratio of length to diameter of the cylindrical core specimens make strength values to decrease [ 4, 5, 6 ]. The specimen size has also a significant effect on the UCS test results that an increase in the size makes a decrease in the UCS values [ 7, 8, 9 ]

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the effect of cubic specimen size on uniaxial compressive

the effect of cubic specimen size on uniaxial compressive

Oct 02, 2017 · It is also reported by the researcher that the influence of dimensions on the strength of rock specimens is in a small degree for the tested Yamaguchi marbles. When the lateral dimensions changed from 20 to 4 cm, an approximately 10% decrease in strength was determined in the range from 90 to 81.5 MPa (Fig. 1)

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effect of sizes on strength of granite rock - binq mining

effect of sizes on strength of granite rock - binq mining

Dec 11, 2012 · The sizes of sample were … and indirectly increase of moisture content that will effect reducing of rock material strength. … the granite. The strength of material decrease … » More detailed

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strain-rate effects on the strength and fragmentation size

strain-rate effects on the strength and fragmentation size

Dec 01, 2009 · The smaller the opening of the structural surfaces, i.e. the smaller the elements at this structural level, the higher the rock mass strength. Therefore, the size effect of rock mass may be attributed to the existence of a structural hierarchy in the rock mass

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size effects on granite behavior under unloading rockburst

size effects on granite behavior under unloading rockburst

May 23, 2016 · Relevant research shows that the rock sample size does have some effect on the P-wave velocity (Fener 2011). As shown in Fig. 3, a slight increase in P-wave velocity with the reduction of sample height exists, and this is probably because of the intrinsic laboratory errors or the rock sample size effect. All these rock specimens with different heights have an approximate P-wave velocity, which ranges …

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numerical analysis on scale effect of elasticity, strength

numerical analysis on scale effect of elasticity, strength

Feb 04, 2016 · It is of great importance to study the failure process and scale effect of jointed rock mass in the field of rock mechanics and mining engineering. In the present paper, initially the uniaxial compression test on granite was performed and acoustic emission (AE) sequence was acquired during the compression process in laboratory. Results from numerical simulations using the particle flow …

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effect of rock discontinuities on certain rock strength

effect of rock discontinuities on certain rock strength

LabuzJ.F. and BiolziL. (1991) Class I versus Class II stability: a demonstration of size effect, International Journal of Rock Mechanics and Mining Sciences, 28 (2/3), 199–205. Google Scholar LundburgN. (1967) The strength-size relation of granite, Int. J. Rock Mech. and Min. Sci., 4, 269–72. Google Scholar

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(pdf) experimental investigation into biaxial compressive

(pdf) experimental investigation into biaxial compressive

Triaxial tests on limestone [22] and on gypsum sample sizes of 75, 100 and 125 mm, respectively. This translates [23] are occasionally cited as evidence of the disappearance of size to a strength reduction of 5.5% going from 75 to 100 mm, and 5.5% effect on strength under high pressure. from 100 to 125 mm

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mechanical behavior of granite with different grain sizes

mechanical behavior of granite with different grain sizes

Nov 23, 2019 · The reason is that the increasing grain size provides longer paths of weakness for growing cracks to propagate along (Eberhardt et al. 1999 ). When T = 450 °C, more micro-cracks were observed and more coalesced and the micro-crack net around …

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loading rate effect of rock material with the direct

loading rate effect of rock material with the direct

Mar 10, 2019 · A series of experimental tests were conducted to investigate the effects of loading rate on the tensile strength of sandstone by using four test methods, including a direct tensile method and three typical Brazilian disc methods (plate loading, circular arc loading, and strip loading). The loading rates used in these tests varied from 10 −2 MPa/s to …

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compressive strength of granite rock

compressive strength of granite rock

In compressive strength tests, compressive strength tests determine the crushing strength of concrete by breaking the cube, commonly known as cube strength, which is approximately 3 tons per square inch, 10 tons per square inch for granite, and 25 to 60 tons per square inch for cast iron

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influence of strain rate on dilatancy and strength of

influence of strain rate on dilatancy and strength of

Changyu Liang, Shuren Wu, Xiao Li, Peng Xin, Effects of strain rate on fracture characteristics and mesoscopic failure mechanisms of granite, International Journal of Rock Mechanics and Mining Sciences, 10.1016/j.ijrmms.2015.03.010, 76, (146-154), (2015)

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