Time-Dependence of Mechanical Property Alterations on Anthracite Coals Treated by Supercritical Carbon Dioxide
Joint Authors
Li, Wei
Pang, Bin
Su, Er-lei
Yang, Quanlin
Liu, Qingquan
Cheng, Yuanping
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-10-28
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The injection of supercritical carbon dioxide (Sc-CO2) into coal seams remarkably changes the physical-chemical structures of coal mass and thereby improves coal mechanical properties.
In this study, a series of unconfined and triaxial compressive strength tests were performed on anthracite coal samples under the pressure of 8 MPa at the temperature of 35°C for 24 h and 48 h, respectively.
Besides, experiments with longer Sc-CO2 treatment time were carried out on coal mass without stress constraint to observe the damage mode of coal.
The results show that Sc-CO2 treatment obviously alters time-dependent mechanical properties of anthracite coal.
The coal samples treated with Sc-CO2 for 240 h and 960 h show different damage modes from limited fractures to a complicated fracture network.
The time-dependence of the mechanical weakening model on Sc-CO2-treated coal was proposed to explain the link between CO2 flow and mechanical weakening effect by means of physical-chemical effects on time scales.
American Psychological Association (APA)
Li, Wei& Pang, Bin& Su, Er-lei& Yang, Quanlin& Liu, Qingquan& Cheng, Yuanping. 2019. Time-Dependence of Mechanical Property Alterations on Anthracite Coals Treated by Supercritical Carbon Dioxide. Geofluids،Vol. 2019, no. 2019, pp.1-9.
https://search.emarefa.net/detail/BIM-1153417
Modern Language Association (MLA)
Li, Wei…[et al.]. Time-Dependence of Mechanical Property Alterations on Anthracite Coals Treated by Supercritical Carbon Dioxide. Geofluids No. 2019 (2019), pp.1-9.
https://search.emarefa.net/detail/BIM-1153417
American Medical Association (AMA)
Li, Wei& Pang, Bin& Su, Er-lei& Yang, Quanlin& Liu, Qingquan& Cheng, Yuanping. Time-Dependence of Mechanical Property Alterations on Anthracite Coals Treated by Supercritical Carbon Dioxide. Geofluids. 2019. Vol. 2019, no. 2019, pp.1-9.
https://search.emarefa.net/detail/BIM-1153417
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1153417