Mercury intrusion porosimetry and X-ray Diffraction data of carbonaceous shale under the action of oxalic acid corrosion

This dataset contains mercury intrusion porosimetry (MIP) and X-ray Diffraction (XRD) data of Permian carbonaceous shale from Southwest China, collected under controlled oxalic acid corrosion conditions. It aims to support mechanistic studies on the coupled chemical-mechanical degradation of carbonaceous shale weak interlayers—critical geohazard drivers in the region—by linking mineral dissolution and microstructural evolution.
The data were obtained from shale samples exposed to oxalic acid solutions at concentrations of 0.005, 0.011, and 0.268 mol/L (plus a distilled water control) for 7, 14, and 21 days, capturing changes in mineral composition (e.g., calcite, illite) and pore-structure parameters (e.g., pore size distribution). This dataset enables validation of multi-scale kinetic models and informs sustainable geohazard mitigation strategies by quantifying the link between acid corrosion and shear strength degradation.

本数据集收录了中国西南地区二叠纪（Permian）碳质页岩在受控草酸腐蚀条件下获取的压汞法孔隙测量（mercury intrusion porosimetry, MIP）与X射线衍射（X-ray Diffraction, XRD）数据。本数据集旨在通过关联矿物溶解与微观结构演化，支撑碳质页岩软弱夹层的化学-力学耦合劣化机理研究——该软弱夹层是该区域关键的地质灾害诱因。实验所用页岩试样分别置于浓度为0.005、0.011、0.268 mol/L的草酸溶液（外加蒸馏水对照组）中，养护时长分别为7、14、21天，记录了矿物成分（如方解石、伊利石）与孔隙结构参数（如孔径分布）的变化。本数据集可用于验证多尺度动力学模型，并通过量化酸腐蚀与抗剪强度劣化之间的关联，为可持续地质灾害防控策略提供科学依据。