Experimental study on re-crushing behaviour of crushed limestone based on acoustic emission location method
Source abstract
Abstract
The examination of non-uniform deformation and re-crushing characteristics of crushed rock and coal is fundamental to understand porous structure evolution of the caved zone. This paper proposed a new index to evaluate the re-crushing degree of mixed crushed limestone based on an innovative compression–acoustic emission (AE) location method. Results showed that the evolution of the AE characteristic parameters was closely related to the deformation stages. The AE cumulative count and energy curves exhibited different trends corresponding to the initial, linear and plastic compression stages of the stress–time curve, respectively. However, the AE amplitude was mostly lower than 50 dB, and the peak frequency was concentrated at 20–40 kHz during the compression. In addition, the three-dimensional (3D) AE location event energy level (LEEL) was proposed to illustrate particle re-crushing degree. There was layered re-crushing phenomenon in the compression process of crushed limestone. Comparing the quantity and energy level of 3D AE location events in each layer, we discovered that the re-crushing behaviour in the middle layer was the most active, and that in the upper layer was approximately twice than that in the lower layer. High energy level AE location events could significantly influence the evaluation of re-crushing degree.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Rock Mechanics and Modeling · Mineral Processing and Grinding · Coal Properties and Utilization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Mining Engineering, Taiyuan University of Technology, Taiyuan, China
College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan, China
Normal College, Qingdao University, Qingdao, China
Funding
National Natural Science Foundation of China · Shanxi Science and Technology Major Project · Tencent Foundation for XPLORER PRIZE, Ten Thousand Talent Program of China for Leading Scientists in Science, Technology and Innovation
References (61)
Show source-provided references
1. Liu TQ. Influence of mining activities on mine rockmass and control engineering. J CHINA COAL SOC. 1995; 20(1):1–5.
2. 10.1002/ghg.175710.1002/ghg.1757 ↗
3. Chu TX, Li P, Yu MG. Dynamic simulation of coal spontaneous combustion in gob under working face advancing. J China Univ Min Technol. 2019;48(3):529–537.
4. 10.1016/j.energy.2022.12427610.1016/j.energy.2022.124276 ↗
5. Chu TX, Han XF, Yu MG. Low temperature oxidation characteristics of crushed coal and macroscopic cause analysis. China Saf Sci J. 2019;29(9):77–83.
6. 10.1016/j.energy.2021.12167410.1016/j.energy.2021.121674 ↗
7. Zhang JX, Research progress and prospect of coal based solid waste back filling mining. J CHINA COAL SOC. 2022;47(12):4167–4181.
8. 10.1016/j.ijmst.2022.11.00210.1016/j.ijmst.2022.11.002 ↗
9. 10.1016/S0167-9031(87)90355-010.1016/S0167-9031(87)90355-0 ↗
10. 10.1631/BF0284117310.1631/BF02841173 ↗
11. Ma ZG, An experimental study of the compaction of water-saturated over-crushed rock. Chin J Rock Mech Eng. 2005;24(7):1139–1144.
12. 10.1016/j.mineng.2008.08.00810.1016/j.mineng.2008.08.008 ↗
13. Su CD, Experiment study of compaction characteristics of crushed stones from coal seam roof. Chin J Rock Mech Eng. 2012;31(1):18–26.
14. Qian ZW. Experimental study on confined loading-water immersion-unloading of coal gangue. J Mining Saf Eng. 2013;30(4):578–582.
15. Huang YL, Zhang JX, Du J. Time dependence of backfilling body in fully mechanized backfilling mining face. J China Univ Min Technol. 2012;41(5):697–701.
16. Huang YL, Strata movement control due to bulk factor of backfilling body in fully mechanized backfilling mining face. J Mining Saf Eng. 2012;29(2):162–167.
17. 10.1016/j.petrol.2013.10.01510.1016/j.petrol.2013.10.015 ↗
18. 10.1016/j.sandf.2017.07.00210.1016/j.sandf.2017.07.002 ↗
19. 10.1007/s40948-018-0094-610.1007/s40948-018-0094-6 ↗
20. 10.1016/j.powtec.2016.04.02610.1016/j.powtec.2016.04.026 ↗
21. 10.1016/j.powtec.2018.11.04910.1016/j.powtec.2018.11.049 ↗
22. 10.1007/s00603-016-1151-510.1007/s00603-016-1151-5 ↗
23. Zhang TJ, Permeability characteristics of crushed sandstone and its stability analysis under step loading. J CHina COAL SOC. 2016 May;41(5):1129–1136.
24. 10.1016/j.petrol.2016.04.03510.1016/j.petrol.2016.04.035 ↗
25. Zhang TJ. Creep fractal characteristics of compressed and crushed coal rock under different environmental humidity. J Mining Saf Eng. 2020 Sept;37(5):1037–1044.
26. Zhang TJ, Re-crushing characteristics in the compaction process of graded crushed coal rock mass. J Mining Saf Eng. 2021 Mar;38(2):380–387.
27. Wang Q, The influence of crushed rock size on bearing deformation performance of gangue rib of gob-side entry retaining formed by roof fracturing. J China Univ Min Technol. 2022 Jan;51(1):100–106.
28. 10.1016/j.fuel.2021.12201110.1016/j.fuel.2021.122011 ↗
29. 10.1007/s00603-020-02333-710.1007/s00603-020-02333-7 ↗
30. 10.1007/s11053-019-09613-210.1007/s11053-019-09613-2 ↗
31. Cheng Z, Hu M, Wang JF. Discrete element modelling of the mechanical behavior of cemented carbonate sand considering the effects of particle shape and breakage. Chin J Comput Mech. 2022 Jun;39(3):315–323.
32. 10.1016/S1003-6326(14)63131-910.1016/S1003-6326(14)63131-9 ↗
33. 10.1016/j.powtec.2023.11863810.1016/j.powtec.2023.118638 ↗
34. 10.1016/j.ijmst.2021.06.00610.1016/j.ijmst.2021.06.006 ↗
35. 10.1007/s40948-023-00574-810.1007/s40948-023-00574-8 ↗
36. 10.1080/10589759.2023.225256310.1080/10589759.2023.2252563 ↗
37. Xin HQ, Research on deformation and crushing rules and acoustic emission characteristics of gangue bulk under the condition of confined compression. J Mining Saf Eng. 2020 Jan;37(1):162–168.
38. 10.3390/min1211142210.3390/min12111422 ↗
39. Pei JL. Investigation on dynamic evolution process of natural fractures based on acoustic emission position. Chin J Rock Mech Eng. 2013 Apr;32(4):696–704.
40. Li Z. Three-dimensional acoustic emission location method for crushed coal and rock and its layered fracture characteristic. J Taiyuan Technol. 2022 May;53(3):507–514.
41. 10.1109/JSEN.2022.320621710.1109/JSEN.2022.3206217 ↗
42. Li Z. “An experimental device and method for compaction acoustic emission and resistivity of crushed coal and rock mass ” CN Patent 109 855 967 A Oct. 26 2021.
43. 10.1016/j.powtec.2021.11.01210.1016/j.powtec.2021.11.012 ↗
44. 10.1016/j.powtec.2022.11767510.1016/j.powtec.2022.117675 ↗
45. 10.1016/j.conbuildmat.2023.13047710.1016/j.conbuildmat.2023.130477 ↗
46. GB/T6003.1-2022. Test sieves of metal wire cloth. Beijing: Standards press of China; 2022.
47. Peng J. Stresses for crack closure and its application to assessing stress-induced microcrack damage. Chin J Rock Mech Eng. 2015 Jun;34(6):1091–1100.
48. 10.3389/fphy.2021.63530610.3389/fphy.2021.635306 ↗
49. Zhang CP. Experimental research on effects of bedding plane on coal acoustic emission under uniaxial compression. Chin J Rock Mech Eng. 2015 Apr;34(4):770–778.
50. 10.16285/j.rsm.2019.146010.16285/j.rsm.2019.1460 ↗
51. 10.1007/s00024-020-02513-010.1007/s00024-020-02513-0 ↗
52. 10.1007/s11771-021-4734-610.1007/s11771-021-4734-6 ↗
53. 10.1007/s00603-022-03104-210.1007/s00603-022-03104-2 ↗
54. 10.1016/j.tafmec.2022.10366610.1016/j.tafmec.2022.103666 ↗
55. 10.1016/j.ultras.2019.10596210.1016/j.ultras.2019.105962 ↗
56. 10.1007/s11629-021-7012-z10.1007/s11629-021-7012-z ↗
57. 10.1007/s11001-022-09507-810.1007/s11001-022-09507-8 ↗
58. 10.3970/cmes.2018.115.08510.3970/cmes.2018.115.085 ↗
59. Xiao B. Deformation and breakage characteristics of granular gangue in confined compression process. Bull Chin Silic Soc. 2021 Dec;40(12):4002–4010.
60. 10.1155/2020/379829210.1155/2020/3798292 ↗
61. 10.1016/j.ijfatigue.2019.10542910.1016/j.ijfatigue.2019.105429 ↗