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- Title
influence of gangue particle size and gangue feeding rate on the dynamic response of suspended buffer and engineering application.
- Authors
Tai, Yang; Guo, Shuai; An, Baifu
- Abstract
The suspended buffer is the core equipment for solid backfilling coal mining. Its dynamic response feature during the collision process with gangue particles is of vital importance for its strength check and service life prediction. In this paper, the SolidWorks and Femap software were adopted to establish a numerical model for the dynamic response of the buffer. The influence of the gangue particle size and gangue feeding speed on the dynamic response of the suspended buffer, which were mainly revealed by the maximumMises stress, was studied. Once the gangue particles impacted the suspended buffer, the maximumMises stress of the suspended buffer rapidly increased to the peak value and then turn to the periodic vibration process. It can be obtained through function fitting that the maximumMises stress peak, the maximum and minimum values of the maximumMises stress within the periodic vibration of the conical protective cover and the buffer base were in power functional relation with the gangue particle size and in a linear relationship with the gangue feeding rate. In addition, the vibration frequency of the maximumMises stress of suspended buffer had a power function relationship with the gangue particle size, while had nothing to do with the feeding rate. According to the aforementioned fitting functions and 15601 backfilling working face parameters in D.Ping Coal Mine, it was determined that the crushed size of the gangue particle was 50 mm. The field-measured buffer maximumMises stress and vibration parameters agreed well with the numerically simulated ones, which verified the reliability of the simulation to some extent.
- Subjects
COAL mining; POLLUTION; GEOLOGY; ELASTIC scattering; POLYSTYRENE
- Publication
Journal of Geophysics & Engineering, 2019, Vol 16, Issue 2, p275
- ISSN
1742-2132
- Publication type
Article
- DOI
10.1093/jge/gxz003