|Abstract:To investigate the chemical constituents, physical property, structural evolution and mineralogical characteristics of magmatic metamorphic coal of hanpoao coal mining area in Hunan province, were characterized by XRF, DTA, SEM, HRTEM, XRD and Raman etc. analysis methods. The results show that the effect of magmatic thermal metamorphism and tectonic stress promoted the increasing degree of coalification to gradually transform into cryptocrystalline graphite; with the increase of coal rank, the ratio of hydrogen to carbon atoms in coals decrease; major mineral components in samples include illite, chlorite, pyrophyllite, quartz and pyrite. With the increase of the metamorphism degree, the true density increases and the porosity and resistivity decrease. After 400℃, the weight loss curve decreases slowly and the slope decreases, indicating less deep cracking and shedding. With the increase of coal rank, the stack height and diameter increase, the evolution of organic macromolecular structure of coal near the magmatic intrusion shows obvious jump; the graphite samples are mainly of 2H- graphite, and contains 3R- graphite to varying degrees; the graphitization degree is 0.47~0.84. The graphite crystal axial length a is 0.2469~0.2471 nm, c is 0.6738~0.6762 nm, and the crystal cell volume V is 0.03562~0.03570 nm3, indicating that the crystal cell volume near the rock mass decreases. With the increase of the metamorphic degree, La and Lc increased rapidly, and the number of stacked layers increased sharply. The internal spatial structure of coal tended to be orderly, and Raman parameters AD1 and P(G-D1) gradually decreased.