School of Geology and Environment;
Xi’an University of Science and Technology;
Xi’an;
China;
College of Geosciences and Surveying Engineering;
China University of Mining and Technology;
Beijing;
China;
Academy of Coal Geological Survey of Hunan Province;
Changsha;
China;
Coal; Deformation; and; Metamorphism; Tectonic; Environment; Aphanitic; Graphite; Structural; Properties; Xinhua; Hunan;