TY - JOUR
TI - Study on the evolution law of physical properties of soft coal seams under different water immersion time
AU - Tang Rui-Feng
AU - Xie Jing
AU - Wang Ying-Wei
AU - Wang Man
AU - Lv You-Chang
AU - Li Xin-Kai
AU - Hu Jin-Hong
AU - Wang Ming-Yao
JN - Thermal Science
PY - 2021
VL - 25
IS - 6
SP - 4515
EP - 4525
PT - Article
AB - Aiming at the problems of easy spalling and roof fall in the soft coal seam  under the influence of strong deep mining, the 31020 working face of  Pingdingshan No.12 coal mine is used as the engineering background, combined  with nuclear magnetic resonance, etc. Various technical methods have carried  out research on the water absorption characteristics, composition,  micro-structure, and fracture morphology of coal at different immersion  time. The experimental results show that the coal sample in this mining area  belongs to coking coal under the bituminous coal category. The main  inorganic substances are kaolinite and calcite.