1.Xi '2.'3.an University of Science and Technology
In the process of microwave assisted rock fragmentation, there are many factors that affect the effect of it, among which the particle size characteristics of minerals are one of the important factors. In this paper, the rock mainly composed of calcite and pyrite is taken as the research object. According to the actual proportion of minerals in the rock, six kinds of mineral particle size ratio schemes are formulated. The multi-physical field coupling analysis platform COMSOL is used to establish an analysis model reflecting the proportion of mineral size. The distribution and evolution of electromagnetic field, temperature field, stress field and plastic zone in rock were studied in depth after microwave irradiation under different schemes. The results show that the mineral particle size ratio has little influence on the distribution and magnitude of electromagnetic field in rock during microwave irradiation. However, the maximum temperature, temperature gradient, first principal stress and maximum shear stress of rock interior all increase in this progress. With the increase of mineral particle size ratio, the area of rock plastic zone increases and the initiation time of it is earlier, the area of tension zone in strong absorbing minerals increases significantly, and the proportion of this area is larger. In general, when the particle size ratio is increase, the mineral size inside the rock is more uneven, meanwhile, the weakening degree of the rock is also higher after microwave irradiation, and the irradiation effect is better.
陈方方,薛博天,张志强,等. 矿物粒径比引起的岩石微波照射效果差异[J]. 科学技术与工程, , ():复制