The mechanical properties of marble, limestone, and sandstone as well as the stress-strain curve, the varying characteristics of the peak strength, the peak strain and elastic modulus were studied by …

Fine-grained sandstone is widely distributed in the Xiangjiaba Hydropower Station. To investigate the mechanical properties of the sandstone, a series of triaxial cyclic loading tests were conducted under the confining pressures of 5 MPa, 15 MPa, and 20 MPa. According to the mechanical characteristics of the sandstone, a typical …

Mechanical properties of sandstone, such as compressive strength and young's modulus, are commonly used in the design of geotechnical structures and numerical simulation of underground reservoirs using models such as the digital groundwater, equivalent porous medium, and Discrete Fracture Network (DFN) models. …

In this paper, an experiment is carried out to acquire the dynamic mechanical properties of a simulated sandstone tunnel by a dual DIC system. The sandstone tunnel is simulated by large sandstone with a prefabricated hole in the center. The speckle size required by DIC system was evaluated, and the results showed that for large specimens …

To study the mechanical and damage evolution properties of sandstone under triaxial compression, we analyzed the stress strain curve characteristics, …

Published: 25 October 2023. Study on pore structure and the mechanical properties of sandstone-concrete binary under freeze–thaw environment. Anlong Hu, Guobin Xue, …

The bedding planes have a considerable influence on the behavior of the rock mass, and it is considered to be critical for slope stability (Ghazvinian et al. 2010 ). Hence, engineering design and stability analysis of underground structure need to consider the anisotropic properties of bedded rock masses. The mechanical parameters of …

Long-term exposure to chemical solutions can change the mineral composition and microstructure and may seriously affect the physical and mechanical properties of rocks. Therefore, to clarify the effects of long-term exposure and types of acids on the mechanical properties of rocks, and to develop the constitutive model of …

The mechanical properties of rocks are significantly affected by chemical corrosion. To explore the influence of chemical corrosion on the weakening laws of sandstone mechanical properties, the porosity and pore size distribution (PSD) of sandstone samples immersed in different chemical solutions was measured by the …

The key rock mechanical parameters are strength, elastic modulus, Poisson's ratio, etc., which are important in reservoir development. The accurate determination of reservoir's mechanical properties is critical to reduce drilling risk and maximize well productivity. Precisely estimating rock mechanical properties is important in drilling and well …

the study was typical white sandstone. The mechanical properties of the sandstone and TSL used. in the test are presented in Table 1. The size of the rock specimen used in the static load. 2 S ...

Sample preparation. The rock samples used in the test are upper Triassic Xujiahe (T 3 xj) sandstone, which is classified as terrigenius fine grain clastic sedimentary rock with a particle diameter ...

In this study, to quantitatively analyse the pore structure and mechanical properties of sandstone after treatment at different temperatures (25 °C, 100 °C, 200 °C, 300 °C, 400 °C, 500 °C, 600 °C, 700 °C, 800 °C, and 900 °C), an experiment was conducted based on nuclear magnetic resonance. The variation laws of the size and …

The mechanical properties of bedded sandstone, including its compressive strength and elastic modulus, first increase and then decrease with increasing temperature, and a thermal temperature of 400 °C was identified as the transition temperature, above which considerable changes in the mechanical properties were …

Then, the microcracks will gradually expand, connect, and finally penetrate into a crack network, resulting in a significant reduction of the physical and mechanical properties of the sandstone [64]. Marble is mainly composed of dolomite and calcite, and these two minerals are sensitive to the effect of temperature.

The study on the evolution of mechanical properties of sandstone with temperature provides a theoretical basis for the extraction of mineral resources in deep sandstone formations and post-disaster engineering construction. 2 Materials and methods 2.1 Sample preparation. To ensure the accuracy of the experimental results, samples …

Abstract The variation in rock mechanical properties with burial depth has always been a cutting-edge research topic worldwide. However, due to the difficulty in sampling from different burial depths, few studies have examined the change in rock mechanical properties with burial depth, especially in terms of the brittleness index. In …

This indicates that the sandstone type is an important parameter affecting the mechanical properties of rock. In fact, the effect of sandstone type is shown in Fig. 7 . Although the data from different researches are normalized separately to avoid natural groups, the sample points of same type of sandstone still remain relatively close after ...

Saturated red sandstone was processed into standard samples with diameters of 50 mm and height of 100 mm according to the standard testing method of Methods for Determining the Physical and Mechanical Properties of Coal and Rock (GB/T23561.1-2009) and ISRM. Sample specifications are shown in Table 1.

Considering these situations, the physical and dynamic mechanical properties of high-temperature sandstone under natural, water, and LN 2 cooling were investigated in this study through a series of mechanical tests. Besides, the evolution of P-wave velocity, dynamic strength, strain, and elastic modulus was analyzed.

For heterogeneous porous sedimentary rocks, the static mechanical properties can differ a lot from the dynamic elastic properties, even within an extremely low-stress difference. We perform uniaxial load-unload tests on one porous and one tight sandstone by setting a series of minor stress cycles to explore how the static …

Article. Mechanical Properties of Sandstones Exposed to High Temperature. Technical Note. Published: 03 March 2015. Volume 49, pages 321–327, ( 2016 ) Cite …

In this study, the water absorption, mechanical properties, and energy evolution characteristics of sandstone were examined through experimental and theoretical analysis. The P-wave velocity was found to …

An experimental study has been carried out as part of a wider programme of research in order to examine some of the physico-mechanical properties of the Jiaozuo Sandstone after exposure to extremely high temperatures. The mechanical properties of the rock under examination are discussed before the results of the thermo-mechanical …

It is found that the true triaxial mechanical properties of sandstone after high temperature treatment are closely related to temperature, and the peak strength, maximum principal strain, volume ...

Therefore, the mechanical properties measured show a general increasing trend with increasing burial depth. Moreover, Fig. 6 indicates that the mechanical …

Beyond 100 °C, the physico-mechanical properties of sandstone are weakened significantly. Mass loss and porosity show a continuously growing with increasing temperature, while P-wave velocity, splitting tensile strength, compression strength, and elastic modulus are decreasing. Nuclear magnetic resonance (NMR) imaging tests were …

W–D cyclic treatment weakens the mechanical properties of sandstone. The static and dynamic tensile strength of sandstone gradually decreases with increasing cycles of W–D treatment. The deterioration of tensile strength is more dramatic in W–D-treated sandstone than that in long-term saturated sandstone. (2)

Mechanical properties of rock at high temperature are of importance for structure design and safety assessment in underground rock engineering. Brazilian disc test, axial compressive test and three-point bending test are adopted to determine the tensile strength σ t, uniaxial compressive strength σ c, elastic modulus E and Mode I …

Published: 27 December 2019. The effect of chemical erosion on mechanical properties and fracture of sandstone under shear loading: an experimental study. Cancan Chen, Shoujian Peng, Shankang...

Article. Open access. Published: 03 March 2024. Experimental and numerical investigation of the mechanical properties and energy evolution of …