Effect of water–rock interaction on the morphology of a rock surface

Chen, Yu; Cao, Ping; Chen, Rui; Teng, Yun

doi:10.1016/j.ijrmms.2010.03.009

Cited by 47 publications

(15 citation statements)

References 27 publications

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“…(4) Strain-softening phase: in which the shear stress drop sharply, with the main asperities on the fracture surface has been sheared off. (5) Residual phase: the curve in this stage is nearly horizontal, and shear stress in provided by the residual friction. The peak shear strength, peak shear displacement and residual strength of limestone fracture increase with the increase in normal stress.…”

Section: Effect Of Chemical Erosion On Morphology Parameters Of Limestone Fracturementioning

confidence: 99%

“…At present, 3-D laser scanning technology is usually used to obtain morphology parameters of the rock surface. Chen et al [5,6] studied the hydro-chemical effect on fracture surface characteristics of coarse-grain sandstone, marble and pyrozenite. Liu et al [30] studied the morphology data and the geometrical statistics of asperities on granite fracture surface under both different confining pressures and tensile loading rates.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study on the influence of hydro-chemical erosion on morphology parameters and shear properties of limestone fractures

et al. 2021

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Hydro-chemical erosion has a great effect on the micro-structure morphology and macroscopic mechanical properties of the rock mass. In this paper, direct shear test system was used to study the hydro-chemical effect on the shear strength characteristics of limestone fractures. Besides, morphology parameters of the fracture under different chemical solutions were also analyzed through three-dimensional laser scanning and electron microscope imaging. Experimental results showed that after hydro-chemical erosion, the profile mean square root deviation S q , the profile area ratio R s , the profile peak point density S pd increased, while the slope mean square root S dq decreased. Combined with scanning electron microscope (SEM) images, it is found that due to the hydro-chemical erosion, the roughness of limestone fracture surface, the discreteness of height distribution of the asperities and the JRC 2D values increased, but the slope of asperities decreased. There was a good exponential relation between the decrease percentage of limestone internal friction angle and soaking time, and a logarithmic relation between the decrease percentage of cohesion and soaking time. According to the gray correlation method, the influencing factors were ranked in descending order as follows: normal stress, soaking time and pH values. In addition, the JRC 2D value had a negative linear correlation with internal friction angle and cohesion of limestone fracture.

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Section: Effect Of Chemical Erosion On Morphology Parameters Of Limestone Fracturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental study on the influence of hydro-chemical erosion on morphology parameters and shear properties of limestone fractures

et al. 2021

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“…To make our results comparable with those obtained in previous similar studies [27], we selected 5 height parameters and two texture parameters to be used as the basis of our quantitative statistical analysis of the microscopic features of the joint surface. e microscopic topography parameters of the periodic joint surface after different numbers of dry-wet cycles are shown in Table 2; the change trends of the microscopic parameters are shown in Figure 6.…”

Section: Analysis Of the Variation Of Microscopic Topography Charactementioning

confidence: 95%

Analysis of Changes in the Micromorphology of Sandstone Joint Surface under Dry-Wet Cycling

Fang

Deng

et al. 2019

Advances in Materials Science and Engineering

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Changes in the micromorphology of joint surface under dry-wet cycling have a direct effect on the mechanical properties of the jointed rock masses, which in turn affects the deformation stability of the bank slope of a reservoir. In this study, we design and carry out a test that aims to quantity the effects of repeated rise and fall of a reservoir on the properties of a jointed rock masses. The results are as follows: first, the roughness, local gradient, and undulation of the joint surface gradually decreased under repeated dry-wet cycling. In addition, the height parameters and texture parameters showed a steep decrease followed by a slow decline. The deterioration was particularly obvious over the first 5 dry-wet cycles. Second, the roughness coefficient of the joint surface, the compressive strength of the face wall, and the basic friction angle were gradually reduced under dry-wet cycling. The shear strength of the jointed rock masses (obtained both quantitatively and experimentally) showed a deteriorating trend controlled by the deterioration of the micromorphology, the strength of the face wall, and the frictional properties of the joint surface. Finally, the dry-wet cycling process determined trends of changes in the microstructure parameters and mechanical properties of the joint surface. Our research results provide a good basis for the analysis of the deterioration and failure of rock masses within the hydrofluctuation belt of a bank slope.

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“…Essa interação leva a dissolução de minerais e a composição química da água reflete o equilíbrio entre as alterações induzidas pela dissolução dos minerais termodinamicamente instáveis e a formação de novos minerais estáveis. O grau de intemperismo depende principalmente do tempo de retenção da água, da temperatura ambiente e do pH [3][4][5][6].…”

Section: Introductionunclassified

Mecanismos que controlam as características das águas dos reservatórios do estado de Sergipe, Nordeste do Brasil

Monteiro

Silva

et al. 2021

Sci. Plena

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O diagrama de Gibbs foi usado para identificar os processos que potencialmente controlam as características químicas das águas dos principais reservatórios do estado de Sergipe, no Nordeste do Brasil. A água do reservatório Poxim controlada inicialmente pela precipitação atmosférica, evoluiu rapidamente para uma composição iônica dominada pelo Ca2+ e HCO3-, como consequência do predomínio da interação água – rocha. O intemperismo é o principal mecanismo que controla a química das águas dos reservatórios Jacarecica I, Jacarecica II, Macela, Ribeira e Jabiberi, com domínio iônico do Na+ e HCO3-, e dos reservatórios Dionísio, Ribeirópolis, Amargosa e Cumbe, com domínio iônico do Na+ e Cl-. A composição iônica atual da água dos reservatórios Taboca, Coité, Algodoeiro, Três Barras, Glória, Carira e Lagoa do Rancho é resultado das variações químicas provocadas pelos sucessivos processos de evaporação. Com o aumento da evaporação, a água foi salinizando e progressivamente mudando de Na+ Ca2+ Mg2+ e Cl- HCO3- SO42-, em Taboca e Coité, para Na+ Mg2+ Ca2+ e Cl- HCO3- SO42- em Três Barras e Algodoeiro, atingindo finalmente Na+ Mg2+ Ca2+ e Cl- SO42- HCO3- em Glória, Carira e Lagoa do Rancho, reservatórios mais salinizados. Em geral, as características químicas das águas dos reservatórios foram controladas por processos naturais, como a interação água – rocha e a evaporação, exceto para os reservatórios Glória, Carira e Lagoa do Rancho, onde o impacto antropogênico mostrou uma contribuição muito expressiva.

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Effect of water–rock interaction on the morphology of a rock surface

Cited by 47 publications

References 27 publications

Experimental study on the influence of hydro-chemical erosion on morphology parameters and shear properties of limestone fractures

Experimental study on the influence of hydro-chemical erosion on morphology parameters and shear properties of limestone fractures

Analysis of Changes in the Micromorphology of Sandstone Joint Surface under Dry-Wet Cycling

Mecanismos que controlam as características das águas dos reservatórios do estado de Sergipe, Nordeste do Brasil

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