School of Mechanics and Civil Engineering;
China University of Mining and Technology;
Beijing;
100083;
China;
State Key Laboratory of Coal Mine Disaster Dynamics and Control;
Chongqing University;
Chongqing;
400030;
China;
Key Laboratory of Safety and High-efficiency Coal Mining;
Anhui University of Science and Technology;
Huainan;
232001;
China;
Fracture network; Acoustic emission(AE); Spatial correlation; Dilatancy; Damage; Fracture angle;