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对自然含水煤样和饱水煤样进行控制压缩量的压裂对比实验,通过Rosin-Rammler模型分析煤样压裂破碎后碎块粒径分布及其与压缩量的关系。研究结果表明:自然含水煤样小粒径(小于1.25 mm)碎块量大于饱水煤样,随着压缩量的增加,自然含水煤样和饱水煤样小粒径碎块量都增加;随着压缩量的增大,自然含水煤样碎块分布趋于分散,饱水煤样碎块分布趋于集中,且饱水煤样碎块分布比自然含水煤样集中;饱水煤样碎块中位径d50比自然含水煤样碎块小。
Comparisons of controlled fracturing pressures between naturally-water-containing coal samples and water-saturated coal samples were carried out. The particle size distribution of fractured and crushed coal samples was analyzed by Rosin-Rammler model. The results show that the particle size of small size (less than 1.25 mm) of natural water - bearing coal samples is larger than that of water - saturated coal samples. With the increase of compression amount, the size of small particle size of natural water - As the amount of compression increased, the distribution of natural water-containing coal samples tended to be dispersed, the distribution of full-water coal-like fragments tended to be concentrated, and the distribution of full-water coal-like fragments was more concentrated than that of natural water-containing coal samples; The median diameter of the block d50 is smaller than that of the natural water-containing coal sample.