porosity of coal

But with the adding of an appropriate amount of ZZZ, the cohesiveness of blended coal was enhanced, the distribution of pore was improved, the porosity of coke decreased, the thickness of pore wall was improved, and the crackle of pore wall reduced.

但通过添加适量的ZZZ改性后，配合煤的黏结性指数得到提升，焦炭的气孔分布改善，气孔率下降，气孔壁厚度增加、裂纹减少。

Coal pore properties of matrix& cleat and their porosity measurement methods

煤储层基质孔隙和割理孔隙的特征及孔隙度的测定方法

Measurement of Coal Cleat Porosity and Relative Permeability Characteristics

煤层割理孔隙度和相对渗透率特征的测定

...the porosity of the coal.

煤炭的多孔性

Coal reservoir is a dual porous rock composed of matrix porosity and fracture with its unique cleat system.

煤储层是一种双重孔隙介质，其孔隙由基质孔隙和裂隙组成，并具有自身独特的割理系统。