Abstract Tectonically deformed coals are critically important in coalfield geology structure, coalbed methane exploration and exploitation, and coal and gas outburst. The mechanical property of coal macerals plays a key role in the deformation characteristic of tectonically deformed coals. However, it has not been well investigated the differences of nanoscale mechanical properties among coal macerals. In this work, by employing the depth-sensing nanoindentation, and establishing theoretical analysis and experimental verification, the paper finds the following results: 1) both hardness and elastic modulus are in the order of exinite vitrinite > inertinite, which correlates closely with macerals’ relevant origin. 2) recovery resistance, Rs, is in the order of exinite

中文翻译：

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煤质组间纳米级力学性能的差异

摘要 构造变形煤在煤田地质构造、煤层气勘探开发、煤与瓦斯突出等方面具有重要意义。煤质的力学性质对构造变形煤的变形特征起着关键作用。然而，煤质之间纳米级力学性能的差异尚未得到很好的研究。在这项工作中，通过采用深度传感纳米压痕，并建立理论分析和实验验证，本文发现以下结果：1）硬度和弹性模量均呈显微镜质 > 惰性，这与微晶质的关系密切。相关来源。2) 恢复电阻 Rs 的顺序为 exinite