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以马头山组(K2m)、妥甸组(J3t)和禄丰组(J1l)紫色泥岩为研究对象,从水热相互作用泥岩的程度进行试验设计,分析了7种处理下3种泥岩崩解的差异性,结果表明:J3t的崩解速率明显大于K2m和J1l,不同处理下紫色泥岩的崩解速率差异较大。运用聚类分析把3种泥岩7种处理下的崩解速率分为3类,3个类间的崩解速率差异显著,引起3个类间泥岩崩解速率差异显著的因素主要是泥岩的饱和泡水和泡水后存在较大的温差变化。其中饱和组崩解速率大于表面浸湿组,大温差组大于小温差或恒温组。特别是温差变化中冰劈作用的存在,引起了泥岩的快速崩解。揭示了水作用对崩解的影响大于热作用,温差的存在有利于母岩崩解。通过对三种紫色泥岩的粘土矿物组成、Saf值(J1l(2.67)>K2m(2.50)>J3t(2.45))、ba值和成熟度(J3t(0.87、15.42)>K2m(0.85、11.46)>J1l(0.50、7.03))的分析,表明J3t最容易崩解,其次是K2m和J1l。
Taking mudstone of K2m, J3t and J1l purple mudstone as the research object, experimental design was conducted based on the degree of hydrothermal interaction mudstone. Three types of mudstone collapse The results show that the disintegration rate of J3t is obviously higher than that of K2m and J1l, and the disintegration rate of purple mudstone differs greatly under different treatments. Using cluster analysis, the disintegration rates of three kinds of mudstone under seven treatments were divided into three categories. The difference in disintegration rate among the three categories was significant. The factors that caused significant difference in the disintegration rate of mudstone among the three categories were mainly the saturation of mudstone Bubble water and water after the existence of a larger temperature difference. Among them, the disintegration rate of saturated group was higher than that of surface wetting group, the large temperature difference group was greater than the small temperature difference group or the constant temperature group. In particular, the temperature difference between the ice splitting effect, causing rapid disintegration of mudstone. It is revealed that the effect of water on disintegration is greater than the thermal effect, and the presence of temperature difference is conducive to the disintegration of the parent rock. Based on the clay mineral composition of three purple mudstone, Saf value (J1l (2.67)> K2m (2.50)> J3t (2.45)), ba value and maturity (J3t (0.87,15.42)> K2m (0.85,11.46)> J1l (0.50,7.03)) analysis showed that J3t most likely to disintegrate, followed by K2m and J1l.