In this artical, fractal dimensions of various rank coal(from lignite to anthracite)and coal-coke are determinated by using gas adsorption data,and correlations between them are studied.

• 本文利用气体吸附数据确定了各种煤阶煤（从褐煤到无烟煤）和煤焦气化反应过程中微孔表面的分形维数及其变化规律。