Characteristic Differences between Primary Coal and Its Tectonic Coal

In order to study the differences between the primary coal and the tectonic coal which overgrowth with the primary coal, porosity, pore diameter distribution, specific surface area and adsorption constant of three delaminations of No. 3 coal of one coal mine in Qinshui basin were measured. The results show that the higher the breakage degree of the coal, the true/apparent density and porosity are bigger, volatile air dry is lower, metamorphic grade of coal is higher; tectonic forces has a big influence on the permeable volume of coal, the higher the breakage degree of the coal, the more obvious of the influence,but less influence on the adsorption volume of coal, the adsorption borehole were in overwhelming superiority in specific surface area, therefore the tectonic forces has less influence on the specific surface area of coal; tectonic forces also has influence on adsorption constant a and b.