Research on safety of coal pillar in goaf of coal seam subjected to shock hazards
Shen Yinpeng
Abstract：The presence of coal pillars in the goaf of coal seams with rock burst is a major hidden danger in the prevention and control of rock burst.Research on the safety of coal pillars to prevent rockburst accidents caused by the influence of coal pillars also complies with relevant regulations.Due to water inrush in the No.1309 working face of Guojiahe Coal Mine,the support of the working face was crushed and unable to be recovered.Therefore,the working face adopted a jumping face method and re opened the open-off cut for re-covery.Resulting in a coal pillar with a width of about 200 m remaining in the central goaf of the original No.1309 working face.There-fore,safety research was conducted on coal pillars in goaf areas.Through the analysis of the factors affecting the impact ground pressure of coal pillars in the goaf of the 1309 working face,the comprehensive index method evaluation shows that geological factors have a rela-tively small impact.The residual coal pillars in the goaf of the 1309 working face are classified as having no impact hazard to other min-ing working faces.
Keywords：extra-thick coal seamcoal pillarcomposite indexlimit loadimpacting
Publication Date：2025-02-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 89-92 )