Abstract: The energy consumed by ore crushing is the main source of energy consumption in mining enterprises.In order to find an effective energysaving method,the main influencing factors of particle crushing characteristics are discussed,and the effects of particle size,porosity and mineral composition on the mechanical properties of ore particles are systematically expounded.The results show that the pore density of the ore with larger particle size is higher,and the strength is relatively low; pre weakening can cause micro cracks in the ore and increase the crushing degree of the ore;quartz and plagioclase are minerals with high hardness,but their content below the critical value has no obvious effect on the ore crushing.

Key words: fragmentation characteristics,granularity,porosity,mineral composition