水对煤压裂破碎粒径分布规律的影响分析  

Study on the Effect of Water Infusion on the Size Distribution of Coal Fracture

作　　者：陈金明[1] 康天合[1] 杨永康[1] 刘宁[1] 王政华[1] 郭卫卫[1] 

机构地区：[1]太原理工大学采矿工艺研究所,山西太原030024

出　　处：《矿业研究与开发》2012年第6期40-42,共3页Mining Research and Development

基　　金：国家自然科学基金资助项目(50474057;50974093)

摘　　要：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。The contrast fracture experiment of natural hydrated coal sample and water - saturated coal sample under controlled compression was performed, and Rosin- Rammler model was used to analyze the particle size distribution of coal sample after being broken and its relationship with the controlled compression. The research results show that： the natural hydrated coal brought more small - size fragments （ smaller than 1.25 mm） than the water - saturated coal, both brought more and more small - size fragments coal with increase of compression ; As the compression increased, the size distribution of fractured natural hydrated coal sample displayed a disperse trend, but the size distribution of fractured water - saturated coal sample displayed a concentrated trend, as well the size distribution of fractured water- saturated coal sample was more concentrated than one of fractured natural hydrated coal sample; The median diameter d50 of fractured water - saturated coal sample small than one of fractured natural hydrated coal sample.

关 键 词：块煤 粒径分布 煤层注水 饱水 

分 类 号：TD315.1[矿业工程—矿井建设]