Abstract:

In order to study the effect of igneous intrusion on coal reservoir adsorption properties, Zhuzhuang coalfield and Zhuxianzhuang coalfield was taken as an example, 10 coal samples were carried out these tests include: vitrinite reflectance measurement, coal quality analysis, isothermal adsorption experiment. Analyzed langmuir volume and the distances from coal samples to igneous rocks, and discusses the differences of coal reservoir adsorption capacity. The results show that, the influencing factors of adsorption capacity are different due to the actual situation of magma intrusions, the coal metamorphic in the study area is still the main factor that influence the absorption capacity of coal reservoir; the moisture in coal would lost its influence on upper part of igneous rocks ; there will be difference in coal reservoir adsorption capacity between the upper part above igneous rocks and the lower part beneath igneous rocks, from magmatic rock mass the equal distance, coal reservoir adsorption capacity of the coal seam above igneous rocks is better than the lower.

Key words: Key words: igneous intrusion, coal reservoir, vitrinite reflectance, langmuir volume, coal quality analysis