基于不同pH值溶液中泥质页岩的循环崩解试验，得到了不同粒径范围颗粒百分含量随崩解次数的变化关系。结果表明，pH值较小时小粒径的颗粒百分含量普遍较大，且随着崩解次数的增加而增大，最终趋于稳定。基于能量耗散原理，建立了岩石单次崩解后新增表面能及循环崩解累积新增表面能的计算公式，重点论述了pH值变化对泥质页岩崩解过程新增表面能的影响规律，结果表明：随着崩解循环次数的增加，岩石表面能单次增量越小，酸碱度变化对泥质页岩崩解表面能单次增量的影响较大；pH值越小，岩石循环崩解累积表面能增量越大，且趋于稳定所需的循环次数越少，说明酸性溶液有助于加速泥质页岩的崩解，碱性溶液对泥质页岩的崩解影响较小。最后，建立了泥质页岩崩解过程中能量耗散量预测的对数函数表征公式，分析认为，模型参数随pH值的增大基本呈相似的递减规律。

A series of disintegration tests was performed on an argillaceous shale in various acid and alkali solutions, from which the relationship between the percentage content of different size particles and the cycle number is determined. Results show that the lower the pH value is, the larger the percentage composition of granules, and the percentage increases with the increase of disintegration cycles and finally tends to be constant. Based on the principle of energy dissipation, theoretical computational formulations are developed for the incremental surface energy and cumulative incremental surface energy, and the influence of pH on the cumulative incremental surface energy is characterized. The incremental surface energy decreases with the increase of cycle number in an individual disintegration cycle, and is significantly influenced by acidity. Lower pH value may lead to more cumulative incremental surface energy; but disintegration characteristics are not influenced by alkaline solution. The energy dissipation of argillaceous shale in the process of disintegration is characterized as a logarithmic function. It is found that all the relationship curves have the same attenuation trend. The model parameters, which are inverse-analyzed from test data, decrease analogously with the increase of pH value.