TY - JOUR
T1 - A Coupled Thermo-mechanical Damage Modeling Application of Cemented Coal Gangue-Fly Ash Backfill Under Uniaxial Compression
AU - Wu, Di
AU - Zhao, Runkang
AU - Hou, Wentao
AU - Wang, Shuo
PY - 2020/5/1
Y1 - 2020/5/1
N2 - Cemented coal gangue-fly ash backfill (CGFB), which is a mixture of coal gangue, fly ash, cement and water, is introduced and used for waste disposal and ground control. Once placed underground, the CGFB is required to possess satisfactory strength and stability for the support of overlying roof. Therefore, it is crucial to understand the mechanical behavior and damage evolution of CGFB, which is also affected by thermal factors. This paper develops a coupled thermo-mechanical damage model to describe the mechanical response and damage of CGFB under uniaxial compression. The developed model considers the thermal factors of heat conduction and binder hydration. The validity of the developed model is verified by the comparison of simulation results and data from an experimental study. The developed model is then used for some applications. The modeling results can contribute to a better design and preparation of stable and endurable CGFB structures.
AB - Cemented coal gangue-fly ash backfill (CGFB), which is a mixture of coal gangue, fly ash, cement and water, is introduced and used for waste disposal and ground control. Once placed underground, the CGFB is required to possess satisfactory strength and stability for the support of overlying roof. Therefore, it is crucial to understand the mechanical behavior and damage evolution of CGFB, which is also affected by thermal factors. This paper develops a coupled thermo-mechanical damage model to describe the mechanical response and damage of CGFB under uniaxial compression. The developed model considers the thermal factors of heat conduction and binder hydration. The validity of the developed model is verified by the comparison of simulation results and data from an experimental study. The developed model is then used for some applications. The modeling results can contribute to a better design and preparation of stable and endurable CGFB structures.
KW - Backfill
KW - Damage
KW - Modeling
KW - Thermo-mechanical coupling
KW - Uniaxial compression
UR - http://www.scopus.com/inward/record.url?scp=85073829531&partnerID=8YFLogxK
U2 - 10.1007/s13369-019-04118-9
DO - 10.1007/s13369-019-04118-9
M3 - Article
AN - SCOPUS:85073829531
SN - 2193-567X
VL - 45
SP - 3469
EP - 3478
JO - Arabian Journal for Science and Engineering
JF - Arabian Journal for Science and Engineering
IS - 5
ER -