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为了研究原生结构煤及与其共生的构造煤之间的物性差异,对沁水盆地某矿的3#煤层的3个分层分别进行了孔隙率、孔径分布、比表面积及吸附常数测定。结果表明:随着煤破坏程度增加,煤的真、视密度和孔隙率变大,挥发分减少,变质程度加深;构造作用对煤的渗透容积影响较大,对吸附容积影响较小;煤比表面积以吸附孔占绝对优势,受构造作用影响较小;随着煤破坏程度加深,吸附常数a、b值增加。
In order to study the difference of physical properties between primary structure coal and its associated coal, the porosity, pore size distribution, specific surface area and adsorption constant of 3 strata of a coal seam in Qinshui Basin were measured. The results show that with the increase of coal destruction, the true and apparent density and porosity of coal become larger, the volatile content decreases and the degree of metamorphism deepens. The tectonic effect has a great influence on the permeable volume of coal and has little effect on the adsorption capacity. Adsorption pore surface area accounted for the absolute dominant, less affected by the tectonic effect; with the deepening of coal destruction, the adsorption constant a, b value increases.