title: Rockburst disaster prediction of isolated coal pillar by electromagnetic radiation based on frictional effect.
abstract: Based on the understanding that charges generated during coal cracking are due to coal particle friction, a microstructure model was developed by considering four different variation laws of friction coefficient. Firstly, the frictional energy release of coal sample during uniaxial compressive tests was investigated and discussed. Then electromagnetic radiation method was used to predict the potential rockburst disaster in isolated coal pillar mining face, Muchengjian Colliery. The results indicate that the friction coefficient of coal particles decreases linearly with the increase of axial loading force. In predicting the strain-type rockburst, the high stress state of coal must be closely monitored. Field monitoring shows that electromagnetic radiation signal became abnormal before the occurrence of rockburst during isolated coal pillar mining. Furthermore, rockburst tends to occur at the early and ending stages of isolated coal pillar extraction. Mine-site investigation shows the occurrence zone of rockburst is consistent with the prediction, proving the reliability of the electromagnetic radiation method to predict strain-type rockburst disaster.
authors: State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao, Shandong 266590, China ; Heilongjiang Ground Pressure & Gas Control in Deep Mining Key Lab, Heilongjiang University of Science and Technology, Harbin, Heilongjiang 150027, China ; College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China.
authors: Tongbin
authors: T
authors: Zhao
authors: State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao, Shandong 266590, China ; College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China.
authors: Yanchun
authors: Y
authors: Yin
authors: Heilongjiang Ground Pressure & Gas Control in Deep Mining Key Lab, Heilongjiang University of Science and Technology, Harbin, Heilongjiang 150027, China.
authors: Fukun
authors: F
authors: Xiao
authors: State Key Laboratory Breeding Base for Mining Disaster Prevention and Control, Shandong University of Science and Technology, Qingdao, Shandong 266590, China ; College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China.
authors: Yunliang
authors: Y
authors: Tan
authors: College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China.
authors: Jianchao
authors: J
authors: Zou
mesh_terms: D003031:Coal / Q000528:radiation effects; D003032:Coal Mining / Q000379:methods*; D004190:Disasters / Q000517:prevention & control*; D004574:Electromagnetic Fields; D005544:Forecasting / Q000379:methods; D017276:Friction
chemical_list: D003031:Coal