Processed results and reproducibility materials for quality-graded elastic-modulus measurement from non-ideal coal and rock compression curves

This record contains de-identified processed results for 299 uniaxial compression curves, the frozen PCMC-M2 prototype V1 configuration and quality-state definitions, aggregate robustness and figure-source tables, and sanitized Python code reproducing aggregate analyses and Figures 3-6. Native testing-machine files, complete long-format curves, identifiable provenance, proprietary parsers, internal interfaces, and commercial software are excluded. Strain 1 denotes axial engineering strain obtained from the axial channel of the claw extensometer and normalized by the measured initial specimen height. Strain 2 denotes radial engineering strain and was not used to determine elastic modulus. The sanitized code is licensed under the MIT License. The processed data, documentation, and reproduced outputs are licensed under CC BY-NC 4.0. See LICENSES.md for the file-level licence map. Figure 1 is conceptual. Figure 2 uses controlled representative long-format curves and is not included in the public package. Figures 3-6 can be reproduced from the released materials.