A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of the effects of three different cooling methods on the dynamic mechanical properties of thermal-treated sandstone
https://orcid.org/0000-0002-1829-6554
Abstract A systematic understanding of the physical and mechanical behavior of high-temperature rocks after different cooling methods can provide a theoretical basis for underground coal gasification and geothermal resource exploitation. In this study, a series of tests were carried out, including wave velocity and split Hopkinson pressure bar (SHPB) test, to analyze the dynamic mechanical properties of thermal-treated sandstone with different heating temperatures (25 °C, 200 °C, 400 °C, 600 °C, 800 °C) under nature, water, and liquid nitrogen cooling treatment. The dynamic stress–strain curves of rock were obtained, and the relationships between three parameters (dynamic strength, elastic modulus, and peak strain) and temperature were investigated. The fragments after impact compression were collected for the screening test, and the degree of fragmentation of sandstone after different heating temperatures and cooling treatments was discussed. The results demonstrate that under the three cooling treatments, the wave velocity, elastic modulus, and dynamic peak strength of sandstone decrease with the increase in thermal treatment temperature while the peak strain and fracture degree increase as the temperature rises. When the temperature is higher than 400 °C, the physical and mechanical properties of sandstone significantly deteriorate. Compared with natural cooling, the rapid cooling of water and liquid nitrogen more severely damages the thermal treatment sandstone. Moreover, the invasion of water weakens the connection between mineral particles, leading to the most significant deterioration of the mechanical properties.
Evaluation of the effects of three different cooling methods on the dynamic mechanical properties of thermal-treated sandstone
https://orcid.org/0000-0002-1829-6554
Abstract A systematic understanding of the physical and mechanical behavior of high-temperature rocks after different cooling methods can provide a theoretical basis for underground coal gasification and geothermal resource exploitation. In this study, a series of tests were carried out, including wave velocity and split Hopkinson pressure bar (SHPB) test, to analyze the dynamic mechanical properties of thermal-treated sandstone with different heating temperatures (25 °C, 200 °C, 400 °C, 600 °C, 800 °C) under nature, water, and liquid nitrogen cooling treatment. The dynamic stress–strain curves of rock were obtained, and the relationships between three parameters (dynamic strength, elastic modulus, and peak strain) and temperature were investigated. The fragments after impact compression were collected for the screening test, and the degree of fragmentation of sandstone after different heating temperatures and cooling treatments was discussed. The results demonstrate that under the three cooling treatments, the wave velocity, elastic modulus, and dynamic peak strength of sandstone decrease with the increase in thermal treatment temperature while the peak strain and fracture degree increase as the temperature rises. When the temperature is higher than 400 °C, the physical and mechanical properties of sandstone significantly deteriorate. Compared with natural cooling, the rapid cooling of water and liquid nitrogen more severely damages the thermal treatment sandstone. Moreover, the invasion of water weakens the connection between mineral particles, leading to the most significant deterioration of the mechanical properties.
Evaluation of the effects of three different cooling methods on the dynamic mechanical properties of thermal-treated sandstone
https://orcid.org/0000-0002-1829-6554
Abstract A systematic understanding of the physical and mechanical behavior of high-temperature rocks after different cooling methods can provide a theoretical basis for underground coal gasification and geothermal resource exploitation. In this study, a series of tests were carried out, including wave velocity and split Hopkinson pressure bar (SHPB) test, to analyze the dynamic mechanical properties of thermal-treated sandstone with different heating temperatures (25 °C, 200 °C, 400 °C, 600 °C, 800 °C) under nature, water, and liquid nitrogen cooling treatment. The dynamic stress–strain curves of rock were obtained, and the relationships between three parameters (dynamic strength, elastic modulus, and peak strain) and temperature were investigated. The fragments after impact compression were collected for the screening test, and the degree of fragmentation of sandstone after different heating temperatures and cooling treatments was discussed. The results demonstrate that under the three cooling treatments, the wave velocity, elastic modulus, and dynamic peak strength of sandstone decrease with the increase in thermal treatment temperature while the peak strain and fracture degree increase as the temperature rises. When the temperature is higher than 400 °C, the physical and mechanical properties of sandstone significantly deteriorate. Compared with natural cooling, the rapid cooling of water and liquid nitrogen more severely damages the thermal treatment sandstone. Moreover, the invasion of water weakens the connection between mineral particles, leading to the most significant deterioration of the mechanical properties.
Evaluation of the effects of three different cooling methods on the dynamic mechanical properties of thermal-treated sandstone
Fan, Lifeng (author) / Li, Han (author) / Xi, Yan (author)
2022
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
Effects of Thermal Treatment on the Dynamic Mechanical Properties of Coal Measures Sandstone
| Online Contents | 2016
Effects of Thermal Treatment on the Dynamic Mechanical Properties of Coal Measures Sandstone
| Online Contents | 2016
Effects of Thermal Treatment on the Dynamic Mechanical Properties of Coal Measures Sandstone
| British Library Online Contents | 2016