基于颗粒压缩实验的破碎比功测定研究

Research on measurement of specific energy of crushing based on particle compression experimen

摘要: 为了更好的表征煤体强度特性，根据黎金格的新表面学说，提出了1种基于颗粒压缩实验的破碎比功测定方法；基于该方法，对阳泉矿区原生煤和不同类型构造煤的破碎比功进行了系统性测定。测定结果表明：阳泉矿区构造煤的破碎比功介于18.14～87.39 J/m²，比原生煤（约1 098.46 J/m²）低1～2个数量级；同时，碎粒煤的破碎比功（64.26～87.39 J/m²）明显大于糜棱煤（约18.14 J/m²），为糜棱煤的3.54～4.82倍。

Abstract: In order to better characterize the strength characteristics of coal, according to P. R. Rittinger’s new surface theory, a determination method of specific energy of crushing based on particle compression experiment is proposed. Based on this method, the specific energy of crushing of primary coal and different types of tectonic coal in Yangquan Mining Area is systematically measured. The results show that the specific energy of crushing of tectonic coal in Yangquan Mining Area is 18.14-87.39 J/m², which is 1-2 orders of magnitude lower than that of primary coal（about 1 098.46 J/m²）; at the same time, the specific energy of crushing of broken coal （64.26-87.39 J/m2） is significantly greater than that of mylonitic coal（about 18.14 J/m²）, which is 3.54-4.82 times that of mylonitic coal.