A Modified Bursting Energy Index for Evaluating Coal Burst Proneness and Its Application in Ordos Coalfield, China
Open Access
- 5 April 2020
- Vol. 13 (7), 1729
- https://doi.org/10.3390/en13071729
Abstract
Coal burst is a type of dynamic geological hazard in coal mine. In this study, a modified bursting energy index, which is defined as the ratio of elastic strain energy at the peak strength to the released strain energy density at the post-peak stage, was proposed to evaluate the coal burst proneness. The calculation method for this index was also introduced. Two coal mines (PJ and TJH coal mines) located in Ordos coalfield were used to verify the validity of the proposed method. The tests results indicate that modified bursting energy index increases linearly with increasing uniaxial compressive strength. The parameter A, which is used to fit relation between total input and elastic strain energy density, has a significant effect on the modified bursting energy index. A large value of parameter A means more elastic strain energy before the peak strength while a small value indicates most of input energy was dissipated. Finally, the coal burst proneness of these two coal mines was evaluated with the modified index. The results of modified index are consistent with that of laboratory tests, and more reasonable than that from original bursting energy index because it removed the dissipated strain energy from the total input strain energy density.Funding Information
- Natural Science Foundation of Hubei Province (2019CFB535)
- China Scholarship Council (201804910219)
This publication has 30 references indexed in Scilit:
- Study on the Evolution Law of Overburden Breaking Angle under Repeated Mining and the Application of Roof Pressure ReliefEnergies, 2019
- Mechanisms of Rockburst Triggered by Slip and Fracture of Coal–Parting–Coal Structure DiscontinuitiesRock Mechanics and Rock Engineering, 2019
- The Spatiotemporal Distribution Law of Microseismic Events and Rockburst Characteristics of the Deeply Buried Tunnel GroupEnergies, 2018
- Analysis for Microseismic Energy of Immediate Rockbursts in Deep Tunnels with Different Excavation MethodsInternational Journal of Geomechanics, 2017
- Signal characteristics of coal and rock dynamics with micro-seismic monitoring techniqueInternational Journal of Mining Science and Technology, 2016
- Coal bursts in the deep longwall mines of the United StatesInternational Journal of Coal Science & Technology, 2016
- Multi-Index Monitoring and Evaluation on Rock Burst in Yangcheng MineShock and Vibration, 2015
- Frequency spectrum analysis on micro-seismic signal of rock bursts induced by dynamic disturbanceMining Science and Technology (China), 2010
- Research on microseismic activity rules in Sanhejian Coal MineJournal of Coal Science and Engineering (China), 2008
- Mining-induced seismicity: Seismic measurement using multiplet approach and numerical modelingInternational Journal of Coal Geology, 2006