Assessing Characteristics of Strong Dynamic Loads in Deep Coal Mining and Their Mechanisms in Triggering Secondary Disasters
Source abstract
Abstract
After entering deep mining, coal mines often experience various intense dynamic load phenomena due to increasingly complex geological conditions, which can lead to secondary disasters, where it is urgent to identify their sources and analyze their disaster-causing effects. This article takes the 3310 working face in Gu Cheng Coal Mine as the engineering background, and uses theoretical analysis, numerical simulation, on-site monitoring, and other methods to analyze the spatial and temporal distribution of dynamic load events during the mining period of this face. The study classifies dynamic load events based on this background into roof-type, fault-type, and coal pillar-type classes, revealing the differences in the spectra, waveforms, and disaster-causing effects of each class. The results show that the strong dynamic load events are mainly concentrated in the working face roof and fault zone areas. The first principal frequency of the three classes has an estimated boundary between 30 and 60 Hz. The waveform decay coefficients of the roof-type, coal pillar-type, and fault-type strong dynamic load events have average values of 4.53, 1.57, and 1.41, respectively. By adopting the above research methods, a theoretical basis can be provided for the source of dynamic loads, thereby achieving source-based prevention and control of rock burst.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Geotechnical and Geomechanical Engineering · Rock Mechanics and Modeling · Geomechanics and Mining Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Shandong Energy Group Luxi Mining Co., Ltd., Heze 274700, China
The State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China
School of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, China
Funding
Natural Science Research Project of Anhui Educational Committee · Major Projects of Shandong Energy Science and Technology Program
References (37)
Show source-provided references
1. State of the art review on mechanism and prevention of coal bumps in China
2. Research on types of coal mine tremor and propagation law of shock waves
3. Discussion on key problems in prevention and control system of coal mine rock burst
4. Characteristics of the processes taking place at the sources high energy tremors occurring during mining of coalface no 17 in coal seam no 361 of the Knurow coal mine
5. Characteristics and recognition of typical micro-seismic signals in rock burst mines
6. On the strong earthquakes induced by deep coal mining under thick strata-a case study
7. Coal bump risk assessment and mine earthquake occurrence characteristics analysis of fully mechanized caving face under hugely-thick conglomerate stratum
8. Zhang, Y., Ji, H., and Wu, H. (2022). Triggering and relationship between mine earthquake activities and stress of earth tides during deep mining. Front. Earth Sci., 10.10.3389/feart.2022.889545 ↗
9. Experimental study on earthquake tremor for transmitting law of rockburst in geomaterials
10. Burst failure effect of mining-induced tremor on roadway surrounding rock
11. Experimental research on seismic wave attenuation by field micro-seismic monitoring in a deep coal mine
12. Study on prevention and control technology of rockburst disaster based on theory of dynamic and static combined load
13. Development and application of a novel deep roadway test system with dynamic-static loading
14. Mining-triggered seismicity governed by a fold hinge zone: The Upper Silesian Coal Basin, Poland
15. The failure of rock10.1016/0148-9062(65)90004-5 ↗
16. Research on the rockburst tendency and AE characteristics of inhomogeneous coal-rock combination bodies
17. A non-linear continuum approach to the problem of fracture zones and rockbursts
18. A note on rock bursts considered as a problem of stability
19. Rock bursts and the instability of rock masses10.1016/0148-9062(96)00021-6 ↗
20. Mechanism of brittle fracture of rock: Part II—Experimental studies10.1016/0148-9062(67)90031-9 ↗
21. Bursting liability indices of coal10.1016/0148-9062(81)91194-3 ↗
22. Zhang, M., Zhao, B., Xu, Z., Benjun, Z., and Zenghe, X. (1988). Mechanism, Prediction, and Prevention of Rockburst. Saf. Coal Mines., 43–44.
23. Zhang, M. (1987). Theory and numerical simulation of rockburst instability. Chin. J. Rock Mech. Eng., 197–204.
24. Qi, Q., Liu, T., Shi, Y., and Lv, J. (1995). Frictional sliding instability mechanism of rockburst. J. Min. Saf. Eng., 174–177.
25. Qi, Q., Gao, Z., and Wang, S. (1998). Theory of rockburst causing structural damage in layered coal rock mass. Coal Min. Technol., 14–17.
26. Hybrid seismic inversion for source parameters of the 2021 Kermanshah earthquake
27. Source parameters of the 2021 M7.2 Haiti earthquake from waveform inversion
28. Seismic source parameters and fault rupture characteristics of the 2023 Turkey-Syria earthquake
29. Li, X., and Zhang, X. (2014). 4.4.2 Coal and rock vibration classification based on vibration wave field characteristics. Mining Geophysical Theory and Technology, China Science Publishing & Media Ltd.. [1st ed.].
30. Scaling law of seismic spectrum10.1029/JZ072i004p01217 ↗
31. Tectonic stress and the spectra of seismic shear waves from earthquakes10.1029/JB075i026p04997 ↗
32. On Volterra’s dislocations in a semi-infinite elastic medium10.1139/p58-024 ↗
33. Shearer, P.M. (2019). Introduction to Seismology, Cambridge University Press. [3rd ed.].10.1017/9781316877111 ↗
34. Source parameters of the 1980 Mammoth Lakes, California, earthquake sequence10.1029/JB087iB06p04595 ↗
35. How long is the coast of britain? Statistical self-similarity and fractional dimension10.1126/science.156.3775.636 ↗
36. Fractal measures and their singularities: The characterization of strange sets
37. Yan, C., Xu, G., and Li, X. (2005). Stability analysis of mined-out areas influenced by blasting vibration with FLAC3D. Chin. J. Rock Mech. Eng., 2894–2899.