The control of coal fragmentation and fines generation during mining and processing is important in coal production. A method to characterise, model and simulate coal size degradation and fines generation based on lithotypes has been developed. This method was refined to cover both high energy single impact to mimic blasting and crushing and low energy incremental breakage to mimic coal handling, transiting, stockpiling and processing. The JKRBT was utilised to characterise high energy single impact breakage and drop shatter tests were used to characterise low energy incremental breakage. X-ray Computed Tomography (XCT) scanning was used as an undisruptive technique to estimate size distributions of drill cores in the drop shatter tests. The JK size-dependent breakage model was applied for breakage characterisation, size degradation modelling and fines generation simulation. The results indicate that coal lithotype has a significant influence on coal degradation and fines generation. This paper has demonstrated that the adaption of two distinct breakage characterisation tests and linkage via the one model is a significant advance in quantifying coal degradation and fines generation during coal production.

中文翻译：

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基于岩型的高能和低能破碎条件下煤降解的建模和模拟

控制开采和加工过程中的煤炭破碎和细粉产生在煤炭生产中很重要。已经开发了一种基于岩型来表征、建模和模拟煤炭粒度退化和细粉生成的方法。该方法经过改进以涵盖模拟爆破和破碎的高能量单次冲击和模拟煤炭处理、运输、储存和加工的低能量增量破碎。JKRBT 被用来表征高能单次冲击破损，而落锤试验被用来表征低能量增量破损。X 射线计算机断层扫描 (XCT) 扫描被用作一种不间断技术来估计落锤测试中钻芯的尺寸分布。JK 尺寸相关破损模型应用于破损表征，尺寸退化建模和细粉生成模拟。结果表明，煤岩型对煤的降解和细粉生成有显着影响。本文已经证明，通过一个模型对两种不同的破碎特征测试和联系进行调整，是在煤炭生产过程中量化煤炭降解和细粉生成方面的重大进步。