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Study on stress variation law of hard concretion coal under the action of pick based on DYNA

Authors :
Xunan Liu
Yanpeng Zhang
Jie Wang
Hongye Li
Lianwei Ma
Source :
Dyna, Vol 90, Iss 226 (2023)
Publication Year :
2023
Publisher :
Universidad Nacional de Colombia, 2023.

Abstract

Modeling and simulation of pick cutting hard concretion coal process are taken as a key link to analyze the stress variation law. To this aim, the properties of hard concretion coal in the target mining area were tested. Related model with high-quality common grid was generated using the mapping method through Hypermesh. the coal breaking process was performed using LS-DYNA, and the stress variation law of coal and hard concretion was analyzed. The results showed that the closer the action position to the middle point of long axis of hard concretion, the greater stress peak would be generated, stripping of the pick occurred when it acted on the 2/5 and 1/2 positions of the long axis. Using similarity theory, the model of hard concretion coal was made and the pick cutting experiment was performed. Compared with simulation torque result, the correctness of modeling and simulation has been verified.

Details

Language :
English, Spanish; Castilian
ISSN :
00127353 and 23462183
Volume :
90
Issue :
226
Database :
Directory of Open Access Journals
Journal :
Dyna
Publication Type :
Academic Journal
Accession number :
edsdoj.0aa693db8b8429aa6ed85cdb37e474d
Document Type :
article
Full Text :
https://doi.org/10.15446/dyna.v90n226.107106