Synchrotron radiation facility-based qantitative evaluation of pore structure heterogeneity and anisotropy in coal

SUN Yingfeng,ZHAO Yixin,WANG Xin,PENG Lei,SUN Qiang

Table 1 Composition analysis results of the coal samples.

Coal sample Coal seam Proximate analysis Vitrinite reflectance and true density Moisture/ % Volatile matter/% Fixed carbon/% Ash/% Coal rank Average maximum vitrinite reflectance/% True density/ (g?cm-3) Xinzhouyao coal #11 coal seam 1.56 34.54 56.67 7.89 Gas coal 0.810 1.350 2 Tangshan coal #9 coal seam 1.60 32.83 56.88 8.71 Fat coal 1.115 1.535 5 Coal sample Coal seam Maceral composition of the coal samples Mineral components Vitrinite group/% Inertinite group/% Liptinite group/% Mineral matter/% Silica/ % Calcite/ % Dolomite/% Siderite/ % Amorphous substance/% Clay mineral/% Xinzhouyao coal #11 coal seam 75.4 20.0 1.8 2.8 0.6 1.9 3.2 1.2 90.8 2.3 Tangshan coal #9 coal seam 61.6 19.3 1.6 17.5 30.5 7.4 57.7 4.4