煤和岩石物理力学性质测定方法 第12部分:煤的坚固性系数测定方法 Methods for determining the physical and mechanical properties of coal and rock—Part 12:Method for the determination coal hardiness coefficients  ICS  73.010 CCS  D 04   中华人民共和国国家标准 GB/T 23561.12—2024 代替GB/T 23561.12—2010 2024-08-2 3发布 2025-03-0 1实施     国家市场监督管理总局 国家标准化管理委员会 发 布 目　　次 前言   ·····································································································   Ⅲ 引言   ·····································································································   Ⅳ 1     范围   ··································································································   1 2     规范性引用文件   ······················································································   1 3     术语和定义   ···························································································   1 4     仪器设备   ······························································································   1 5     试件规格   ······························································································   3 6     测定步骤   ······························································································   4 7     数据计算   ······························································································   4 附录A （规范性）    煤的坚固性系数测定记录表   ·······················································   5 参考文献   ··································································································   6 GB/T 23561.12—2024     Ⅰ