Numerical simulation study on dynamic response characteristics of coal pillar under dynamic load impact
XIE Fang-peng
HOU Ji-chuan
LI Hui-bo
CUI Chao-chao
Abstract：The stability of coal pillar plays an important role in the safety of mine production.Aiming at the dynamic response character-istics of coal pillar under dynamic load impact,taking the protective coal pillar of a mine as the engineering background,the stress and plastic zone expansion law of protective coal pillar were studied based on FLAC3D simulation software.The research shows that:increas-ing the size of coal pillars can increase the stability of coal pillars and improve the support capacity of coal pillars;stress concentration will appear inside the coal pillar,the increase of coal pillar size will reduce the degree of stress concentration.The research results pro-vide theoretical guidance for the failure and instability of coal pillars and provide a theoretical basis for the safe production of deep mines.
Keywords：protective coal pillarnumerical simulationcoal pillar sizestress evolutionplastic zone expansion
Publication Date：2023-12-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 92-97 )