Shear behaviors of natural rock fractures infilled with cemented calcite

Zhao, Zhihong; Lin, Tao; Chen, Yuedu; Zhao, Xingguang; Chen, Liang; Wang, Ju

doi:10.1016/j.compgeo.2021.104493

Cited by 14 publications

(4 citation statements)

References 40 publications

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Section: Formular Analysis Of the Obtained Resultsmentioning

confidence: 96%

“…Figure 9 compares the laboratory results and the estimated data using the revised formula Equation (17). It is clear that Equation (17) produces more accurate estimates of the shear strength of both sandstones with a different infill thickness. The formula-based analysis suggests that more accurate estimations can be obtained when the t/a ratio is less than 1.2 (for S1) and 1.5 (for S2).…”

Section: Formular Analysis Of the Obtained Resultsmentioning

confidence: 96%

“…Under relatively large normal stresses, friction occurs between the rock surface and the infill material. Considering this, the existing methods can be refined by including the friction component, as shown in Equations ( 16) and (17).…”

Section: Formular Analysis Of the Obtained Resultsmentioning

confidence: 99%

“…In the field, the rock joints are typically filled with natural material such as soil. To study the effect of infill material on the strength of jointed rock mass, a series of laboratory studies under constant normal load (CNL) conditions has been conducted [9][10][11][12][13][14][15][16][17][18][19][20]. In addition, research into the constant normal stiffness (CNS) condition [21][22][23][24][25] has been carried out (see Table 1).…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Clay Infill on Strength of Jointed Sandstone: Laboratory and Analysis

Cui,

Gratchev

2024

Geotechnics

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The strength of jointed rock is a fundamental factor in the slope stability of rock mass. This research investigates the effect of infill thickness on the strength of jointed rock specimens. Unlike previous studies involving artificial rock-like materials and saw-tooth surfaces, this work has been conducted on two natural types of sandstone with various rock surfaces. Natural low-plasticity clay of different thicknesses (1 mm to 3 mm) was used as the infill material. A series of shear box tests with a range of initial normal stresses from 0.5 MPa to 1.5 MPa were performed to obtain high-quality data regarding the shear strength of natural rock and to provide insights into the effect of infill and rock surface roughness on shear strength. The obtained results were also used to improve the current methods of rock strength predictions, which were initially designed to estimate the strength of artificial rock-like material. Based on the obtained laboratory data and the strength estimation using different methods, a newly proposed procedure was proved to provide more accurate estimations of the shear strength of jointed rock.

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Section: Formular Analysis Of the Obtained Resultsmentioning

confidence: 96%

Section: Formular Analysis Of the Obtained Resultsmentioning

confidence: 96%

Section: Formular Analysis Of the Obtained Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Effect of Clay Infill on Strength of Jointed Sandstone: Laboratory and Analysis

Cui,

Gratchev

2024

Geotechnics

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Shear Behaviors and Damage Characteristics of Rock Fractures

Zhao

2023

Coupled Thermo-Hydro-Mechanical-Chemical Processes in Fractured Rocks

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Impact of stylolite cementation on weathering rates of carbonate rocks

Israeli,

Emmanuel

2023

Carbonates Evaporites

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The weathering of carbonate rocks plays a signi cant role in the evolution of Earth's surface. Such weathering is often accelerated by the presence of stylolites, which are rough, serated surfaces that form by dissolution under burial or tectonic stresses. Stylolites are thought to represent zones of mechanical weakness in rocks, as well as regions in which chemical weathering is enhanced. However, a quantitative framework capable of predicting how stylolites accelerate weathering in carbonates has yet to be achieved. In this study, we rst used scanning electron microscopy and wavelength dispersive spectroscopy to characterize the way in which the two sides of individual stylolites are connected at the microscopic scale. In the samples we examined, we found that micrometer-scale calcite bridges span the opposing sides of the stylolites, effectively cementing the rock together. This cement lled 1%-30% of the stylolite volume. We then used a numerical cellular automaton model to simulate the effect that the degree of carbonate cementation has on stylolitic carbonate rock weathering. Our results show that weathering rates decrease non-linearly as the degree of stylolite cementation increases. The effect on overall rock weathering rates is signi cant: stylolite-bearing rocks with 1% cementation weathered as much as 37 times faster than limestone without stylolites, primarily because of accelerated mechanical erosion. Our results indicate that stylolites could be as important as joints and fractures in accelerating carbonate rock weathering and in the development of karst landscapes, potentially making a major contribution to global carbonate weathering.

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Shear behaviors of natural rock fractures infilled with cemented calcite

Cited by 14 publications

References 40 publications

The Effect of Clay Infill on Strength of Jointed Sandstone: Laboratory and Analysis

The Effect of Clay Infill on Strength of Jointed Sandstone: Laboratory and Analysis

Shear Behaviors and Damage Characteristics of Rock Fractures

Impact of stylolite cementation on weathering rates of carbonate rocks

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