Dynamic response and energy dissipation-transfer characteristics of coal subjected to impact loading under coupled thermo-gas-stress conditions
- 1School of Safety and Emergency Management Engineering, Taiyuan University of Science and Technology
- 2College of Mining Engineering, Taiyuan University of Technology
Abstract
To research the coal’s dynamic response and energy-induced disaster features under complex geology conditions, impact assays were executed among coal specimens under coupling conditions of different temperatures and nitrogen pressures using a visualized thermo-pneumatic coupled SHPB system. The results show that the impact strain evolution of coal mass under the thermo-gas coupling environment presents a three-stage characteristic (slow increase-rapid rise-leveling off). Impact velocity, gas pressure, and temperature realize differentiated regulation of coal dynamic response through dynamic driving, confining pressure constraint, and thermal degradation effect, respectively. The regulation mechanisms of single-field parameters on energy evolution are different: the rise in impact velocity strengthens energy input, inhibits energy storage, and accelerates energy dissipation; gas pressure raises the energy threshold of coal mass failure through the confining pressure constraint effect; the increase in temperature reduces the coal’s mechanical strength and energy threshold through the thermal deterioration effect. Gas pressure and temperature show an antagonistic effect on regulating the coal’s energy evolution, and the impact velocity amplifies their coupling result. Under the coupling of the three factors, coal mass exhibit the characteristics of inelastic energy storage residue and total energy dissipation failure, which is the core energy mechanism for the sudden occurrence of dynamic disasters in deep coal seams. This study can provide engineering references for precisely preventing dynamic disasters among coal seams with high ground temperature and high gas content.
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BibTeX
@article{wang2026dynamic,
title = {{Dynamic response and energy dissipation-transfer characteristics of coal subjected to impact loading under coupled thermo-gas-stress conditions}},
author = {Kai Wang and Jinwen Bai and Guorui Feng and Penghua Han and Ruipeng Qian},
journal = {Geomechanics and Geophysics for Geo-Energy and Geo-Resources},
year = {2026},
month = jul,
doi = {10.1007/s40948-026-01199-3},
url = {https://doi.org/10.1007/s40948-026-01199-3},
note = {CC BY},
}
RIS
TY - JOUR
TI - Dynamic response and energy dissipation-transfer characteristics of coal subjected to impact loading under coupled thermo-gas-stress conditions
AU - Kai Wang
AU - Jinwen Bai
AU - Guorui Feng
AU - Penghua Han
AU - Ruipeng Qian
PY - 2026
DA - 2026/07/01
JO - Geomechanics and Geophysics for Geo-Energy and Geo-Resources
DO - 10.1007/s40948-026-01199-3
UR - https://doi.org/10.1007/s40948-026-01199-3
AB - To research the coal’s dynamic response and energy-induced disaster features under complex geology conditions, impact assays were executed among coal specimens under coupling conditions of different temperatures and nitrogen pressures using a visualized thermo-pneumatic coupled SHPB system. The results show that the impact strain evolution of coal mass under the thermo-gas coupling environment presents a three-stage characteristic (slow increase-rapid rise-leveling off). Impact velocity, gas pressure, and temperature realize differentiated regulation of coal dynamic response through dynamic driving, confining pressure constraint, and thermal degradation effect, respectively. The regulation mechanisms of single-field parameters on energy evolution are different: the rise in impact velocity strengthens energy input, inhibits energy storage, and accelerates energy dissipation; gas pressure raises the energy threshold of coal mass failure through the confining pressure constraint effect; the increase in temperature reduces the coal’s mechanical strength and energy threshold through the thermal deterioration effect. Gas pressure and temperature show an antagonistic effect on regulating the coal’s energy evolution, and the impact velocity amplifies their coupling result. Under the coupling of the three factors, coal mass exhibit the characteristics of inelastic energy storage residue and total energy dissipation failure, which is the core energy mechanism for the sudden occurrence of dynamic disasters in deep coal seams. This study can provide engineering references for precisely preventing dynamic disasters among coal seams with high ground temperature and high gas content.
SN - 2363-8419
SN - 2363-8427
ER -