Effects of Heating Rate on the Dynamic Tensile Mechanical Properties of Coal Sandstone during Thermal Treatment
Joint Authors
Zhang, Lianying
Wu, Yu
Mao, Xianbiao
Chen, Yanlong
Li, Ming
Pu, Hai
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-10-18
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
The effects of coal layered combustion and the heat injection rate on adjacent rock were examined in the process of underground coal gasification and coal-bed methane mining.
Dynamic Brazilian disk tests were conducted on coal sandstone at 800°C and slow cooling from different heating rates by means of a Split Hopkinson Pressure Bar (SHPB) test system.
It was discovered that thermal conditions had significant effects on the physical and mechanical properties of the sandstone including longitudinal wave velocity, density, and dynamic linear tensile strength; as the heating rates increased, the thermal expansion of the sandstone was enhanced and the damage degree increased.
Compared with sandstone at ambient temperature, the fracture process of heat-treated sandstone was more complicated.
After thermal treatment, the specimen had a large crack in the center and cracks on both sides caused by loading; the original cracks grew and mineral particle cracks, internal pore geometry, and other defects gradually appeared.
With increasing heating rates, the microscopic fracture mode transformed from ductile fracture to subbrittle fracture.
It was concluded that changes in the macroscopic mechanical properties of the sandstone were result from changes in the composition and microstructure.
American Psychological Association (APA)
Li, Ming& Mao, Xianbiao& Pu, Hai& Chen, Yanlong& Wu, Yu& Zhang, Lianying. 2017. Effects of Heating Rate on the Dynamic Tensile Mechanical Properties of Coal Sandstone during Thermal Treatment. Shock and Vibration،Vol. 2017, no. 2017, pp.1-11.
https://search.emarefa.net/detail/BIM-1204429
Modern Language Association (MLA)
Li, Ming…[et al.]. Effects of Heating Rate on the Dynamic Tensile Mechanical Properties of Coal Sandstone during Thermal Treatment. Shock and Vibration No. 2017 (2017), pp.1-11.
https://search.emarefa.net/detail/BIM-1204429
American Medical Association (AMA)
Li, Ming& Mao, Xianbiao& Pu, Hai& Chen, Yanlong& Wu, Yu& Zhang, Lianying. Effects of Heating Rate on the Dynamic Tensile Mechanical Properties of Coal Sandstone during Thermal Treatment. Shock and Vibration. 2017. Vol. 2017, no. 2017, pp.1-11.
https://search.emarefa.net/detail/BIM-1204429
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1204429