%0 Dataset
%T Evolution data set of sandstone mechanical parameters under the action of multiple factors in freeze-thaw environment (2024.7)
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/a73e7a97-7476-4794-98c4-a356318128cf
%W NCDC
%A xu pei yun
%A zhang xiao long
%K Keywords alpine Kuangqu;freeze-thaw action;physical and mechanical characteristics;sandstone slope
%X Due to the significant temperature differences between day and night and seasonal, as well as frequent seasonal rainfall, the sandstone slopes frequently experience freeze-thaw cycles in open-pit coal mines in alpine areas. Repeated actions will cause pore expansion, crack initiation and mechanical properties degradation in sandstone, directly threatening slope stability. However, existing research has not yet clarified the evolution laws and quantitative characterization models of the mechanical properties of sandstone under the coupled action of multiple factors (water saturation, freeze-thaw temperature difference, cycle number), which is difficult to support the theoretical needs of slope safety prevention and control in alpine Kuangqu mining areas. The quantitative effects of water saturation, freeze-thaw temperature difference, and number of freeze-thaw cycles on key mechanical parameters such as compressive strength, elastic modulus, and peak strain of sandstone are revealed, and the trend laws of each parameter changing with multiple factors are clarified. Based on the principle of dimensional analysis and integrating the influence laws of single factors, a mechanical characterization model of the compressive strength and elastic modulus of water-bearing sandstone under the coupled action of multiple factors is established