Thermo-mechanical properties of Bundelkhand granite near Jhansi, India

Singh, B. B.; Ranjith, P.G.; Chandrasekharam, D.; Viete, Daniel R.; Singh, Hemant Kumar; Lashin, Aref; Al-Arifi, Nassir

doi:10.1007/s40948-015-0005-z

Cited by 40 publications

(7 citation statements)

References 12 publications

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“…The main reason for the losses in elastic and strength properties was a dense fracture network, which was an outcome of the high-temperature treatment. The article [47] confirmed that the thermally induced fracture network is a major source of weakening of the TT granite mechanical properties (Figure 24). The hydraulic fracturing experiments were monitored by a combination of independent systems, such as AE monitoring and pressure, volume and deformation sensors.…”

Section: Discussionsupporting

confidence: 54%

Assessment of Saturation Effect on Hydraulic Fracturing in Sandstone and Thermally Treated Granite

et al. 2023

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In this study, a set of laboratory experiments was carried out to study the parameters of hydraulic fractures induced in the dry and mineral-oil-saturated rocks and compare them with the geomechanical characteristics of tested samples. We chose sandstone and thermally treated granite as the materials for research. There are very few known studies related to the mechanical and acoustic properties of oil-saturated rocks, and even fewer studies describing, in detail, the parameters of hydraulic fractures generated in oil-saturated rocks. The hydraulic fracture parameters were determined using a set of independent sensors installed to measure the axial deformation of the sample (which is directly related to the aperture of created hydraulic fracture), fluid pressure, fluid volume injected into hydraulic fracture, and localization of acoustic emission (AE) events, generated during the propagation of hydraulic fractures. Our study focuses on the investigation of the influence of rock properties, altered by mineral oil saturation and thermal treatment, on such parameters of hydraulic fracturing as breakdown pressure (BP), fracture aperture, and the resulting roughness of the hydraulic fracture surface. In addition, we studied the influence of injected fluid viscosity on the parameters of created hydraulic fractures. It was revealed that the saturation state caused a reduction in the values of mechanical parameters such as Young’s modulus, compressive strength, and cohesion, and had a similar reducing influence on the breakdown pressure. The values of HF parameters, such as fracture width and the volume of fracturing agent injected into the HF, are higher in the tests for both saturated sandstone and saturated TT granite. However, we found out that thermal treatment of granite samples led to a much more significant reduction in the values of mechanical and acoustic parameters than the mineral-oil saturation procedure because it created a dense network of thermally induced cracks. The results obtained in our laboratory studies can be taken into account in the modeling of hydraulic fracturing in the field.

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Section: Discussionsupporting

confidence: 54%

Assessment of Saturation Effect on Hydraulic Fracturing in Sandstone and Thermally Treated Granite

et al. 2023

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“…Some researchers investigated changes in physical properties such as mass, volume, density, unit volume weight, P and S wave velocity, porosity, and permeability and mechanical properties such as compressive strength, point load strength and elastic modulus values after slow (air) cooling from high temperature. Singh et al (2015) have focused on impacts on the thermal and mechanical properties under different temperature of Bundelkhand granite of India. They noticed that the young's modulus reduces with an increase in temperature of granite.…”

Section: Previous Studiesmentioning

confidence: 99%

Investigation of the effects of two different cooling treatments on the physico-mechanical and microstructural properties of granite after high temperatures

Kahraman

2022

Geomech. Geophys. Geo-energ. Geo-resour.

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granites. The disintegration of the water-cooled granite samples increased considerably at 1000 °C and measurements could not be taken at this temperature. At the same temperature, water-cooling treatment caused microcracks and micropores, which led to more critical damage to the granite. These conclusions verify that different cooling methods have several effects on the physico-mechanical and microstructural properties of granite, and ensure a foundation for the prediction of rock mass behaviors in situations with high temperature exposure effects (e.g., geothermal exploration and nuclear waste disposal). Article highlights• The physical and mechanical properties of granite are reduced after high temperatures with water and oven cooling methods. • The effect of oven and water cooling increased the impacts on rock physical and mechanical parameters. • The microstructural properties of rock are affected by the treatment temperature and cooling method.

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“…While, the high temperature and pressure of water hydro-thermal influences on gritstone are few investigated, especially the coupled hydro-thermal effect on physical and mechanical properties of gritstone. However, in recent years, the behavior of rocks under thermos-mechanical coupling (TM) and measurement of basic physical and mechanical parameters is very complex (Hudson et al, 2009;Dutt et al, 2012;Bonte et al, 2014;Sengun, 2014;Singh et al, 2015;Shi et al, 2018;Wang and Konietzky, 2019). It includes rock deformation modulus, Poisson's ratio, tensile strength, compressive strength, cohesion, internal friction Angle, viscosity, thermal expansion coefficient and other changes with temperature (Gautam et al, 2016;Guha Roy and Singh, 2016;Yao et al, 2016;Sirdesai et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of High Temperature and High Pressure of Water on Micro-Characteristic and Splitting Tensile Strength of Gritstone

Zhao

Zhou

et al. 2019

Front. Earth Sci.

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To investigate the role of gritstone after hydro-thermal treatment on the mechanical properties and deformation failure behavior, the Brazilian test are carried out on gritstone specimens. Using load-displacement curves, the peak load and peak displacement of the gritstone specimens are analyzed in detail. The mechanical parameters are closely related to the high temperature, high pressure of water and the cooling down methods. The static splitting tensile strength (STS S ) of specimens are decreasing with the increase of water pressure. In the cooling down group, the STS S and peak displacement of specimen WP1 are the lowest one. While, the STS S of specimen W1 is the biggest one. The differences in mechanical properties of the gritstone specimen are mainly caused by the ablation effect in the microscale under different HTHP and cooling down conditions. The surface deformation characteristics of the tested gritstone specimens are investigated by analyzing the full strain field and the local strain concentration. In the gritstone specimen, the major principal strain is first concentrated in the bottom or the top of gritstone specimens where the crack is initiated. The small jump of local strain means crack initiation and propagation, while the fracture of strain gauge leads to strain mutation. The SEM results are discussed to describe the fracture mechanism of brittle gritstone after HTHP treatment.

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Thermo-mechanical properties of Bundelkhand granite near Jhansi, India

Cited by 40 publications

References 12 publications

Assessment of Saturation Effect on Hydraulic Fracturing in Sandstone and Thermally Treated Granite

Assessment of Saturation Effect on Hydraulic Fracturing in Sandstone and Thermally Treated Granite

Investigation of the effects of two different cooling treatments on the physico-mechanical and microstructural properties of granite after high temperatures

Effect of High Temperature and High Pressure of Water on Micro-Characteristic and Splitting Tensile Strength of Gritstone

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