%0 Journal Article
%A QI  Wen-chao
%A CAI  Yong-zhi
%A HE  Tong
%A LIU  Lei
%A PANG  Xin
%T Mechanical Characteristics and Macromicro Damage Evolution of Basalt under Static Compression after High Temperature Water Cooling Cycles
%D 2025
%R 10.11988/ckyyb.20230920
%J Journal of Changjiang River Scientific Research Institute
%P 145-154
%V 42
%N 2
%X <p id="p00010">Static uniaxial compression tests were conducted on basalt samples using the HUT-106A testing machine to investigate the mechanical properties and macro-micro damage evolution laws of basalt subjected to high-temperature water-cooling cycles. The tests involved water-cooling cycles at three different temperatures (100, 300, and 450 ℃) with varying cycle times (1, 3, 5, and 7 times). The compressive fractures of rock samples were observed using SEM. Results reveal that when temperature remains constant and the number of cycles increases, basalt exhibits deteriorating trends in mass, wave velocity, peak strength, and elastic modulus. The stress-strain curve decelerates, and the suddenness and brittleness of failure weaken, whereas the gradualness and plasticity of deformation enhance. The degree of deterioration is most pronounced after seven water-cooling cycles at 450 ℃. In terms of damage, the macro and micro failure modes of basalt vary with the number of cycles at a constant temperature. After seven water-cooling cycles at 450 ℃, basalt exhibits plastic failure. Under the combined action of high-temperature water-cooling cycles and load, the total damage evolution curve of basalt displays nonlinear evolution characteristics, with the curve gradually decelerating as the number of cycles increases. This indicates that basalt transitions from brittle to plastic behavior with increasing cycle times.</p>
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20230920