Research on law of air leakage channel generated by narrow coal pillar based on PFC3D
ZHANG Leqiang
LI Liang
Abstract：During the mining of coal face,as a solid coal,narrow coal pillar will produce an elastic-plastic zone and fissures will develop inside it.When the fissures develop to a certain extent,the stability of narrow coal pillar will be affected.Moreover,the surface of coal pillar will undergo long-term plastic failure,and in serious cases,narrow coal pillar will undergo compressive deformation and even col-lapse.Aiming at the narrow coal pillar at the No.204 working face of Gaojiapu Coal Mine,the PFC3D software was used to simulate the mining process of the No.204 working face,the fissure development and porosity change of the narrow coal pillar after mining at the working face was studied,the law of the narrow coal pillar producing air leakage channel was determined,and a basis for taking targeted measures to prevent and control the narrow coal pillar air leakage was provided.
Keywords：PFC3D simulationnarrow coal pillarfissure developmentporosityair leakage channel
Publication Date：2024-10-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 77-81 )