Research on the Concept of Rock Energy Body and Rock Fragmentation Index
In order to promote the development of rock fragmentation theory,the concept that rock can be regarded as"introverted energy material"with the ability to resist fragmentation is proposed from the geology.Based on the crystal frag-mentation,rock fragmentation is interpreted as the breaking of binding energy between rock crystals in microscopic,it shows that energy consumption in rock fragmentation is related to surface energy.The calculation method of surface energy is given by NSCB splitting test,the fragmentation energy consumption of rock energy body and rock crushing degree index is proved.The test parameters in the existing literature are selected,and the representative rock energy body fragmentation energy consumption is calculated.The results show that the fragmentation energy consumption of rock energy body increases with the decrease of rock target crushing scale;In SHPB,the energy consumption of rock fragmentation under incomplete fragmentation condition is greater than that under complete fragmentation condition,and this part of energy is consumed by internal damage and plastic strain of rock.The rock fragmentation index Ku calculated according to the definition of fragmentation energy consumption value can quantitatively describe the degree of rock fragmentation,making up for the shortcomings of qualitative description.The re-search results enrich the rock fracture theory and can provide reference for rock mechanics and related rock fragmentation engi-neering.
rock mechanicsrock fracturerock fracturesurface energyfragmentation theory
万方数据
维普
