注CO2与煤中矿物反应渗透率变化规律.

Taking on Sihe Mine in Jincheng mining area as the research object，the mineral components and filling ways in coal were conducted by scanning electron microscopy and X-ray diffraction. According to the coal reservoir geometry model and percolation theory，the mathematical model about the initial permeability of coal and the permeability after reaction with mineral were established. Based on pore size distribution and the different mineral solubility of coal samples in Sihe Mine，the variation rules about permeability after injection carbon dioxide reactions with different minerals in coal were discussed. The results show that minerals in coal are mainly composed of clay and carbonate minerals；minerals in coal exists in two ways，namely some minerals adhere to fracture and completely fill or half fill in the coal fracture. The differences about reaction time among different minerals lead that coal reservoir permeability is increased first then decreased after injection carbon dioxide. When the contents of the minerals are the same，the higher of filling mineral contents in the large hole and cracks，the more increase of coal reservoir permeability after the dissolution of mineral；the experimental results verify the reliability of the mathematical model. [ABSTRACT FROM AUTHOR]