This paper presents the results of laboratory tests conducted on a series of mini-cylinder specimens to measure the uniaxial compressive strength of sub-bituminous coal, which is sparsely recorded in the public domain. The measurements were made on mini-cylinder specimens (non-standard) sized from 9.3 to 22.6 mm in diameter, sourced from the Surat–Clarence–Moreton Basin in Australia, an important region for coal mining and coal seam gas extraction. The tested specimens presented poorly developed cleats and were texturally classified as non to poorly banded, although the composition is rich in vitrinite group macerals. The inherent variability of experimental coal strength results was found to be related to fabric and texture. The results from the mini-cylinder specimens could be scaled to predict the behaviour of larger core sizes commonly used for testing mechanical variability and for estimating full seam rock mass strength.

中文翻译：

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次烟煤微型圆柱试样的缩放抗压强度

本文介绍了对一系列微型圆柱体试样进行的实验室测试结果，以测量亚烟煤的单轴抗压强度，但公共领域的记录很少。测量是在直径为 9.3 至 22.6 毫米的微型圆​​柱试样（非标准）上进行的，这些试样来自澳大利亚的苏拉特 - 克拉伦斯 - 摩顿盆地，该盆地是煤炭开采和煤层气开采的重要地区。测试的标本呈现出发育不良的割理，并且在质地上被归类为无带状或带状不良，尽管该成分富含镜质组微晶。发现实验煤强度结果的固有可变性与织物和质地有关。