DOI: 10.11799/ce201702004
Rational width of narrow coal pillar based on hanging roof length of main roof
PAN Ji-liang
GAO Zhao-ning
ZHENG Zhi-wei
ZHANG Yang
Abstract：Aiming at the adverse effects of main roof's hanging roof length on the stability of narrow coal pillar, theoretical analysis and numerical simulation were carried out to study the excavation position and reasonable width of narrow coal pillar. The results showed that the length of hanging roof in main roof directly affected the stability of roadway surrounding rock. In order to make the fracture line locate inside the coal wall, improve the stability of the surrounding rock and supporting capacity of coal pillar, the reasonable width of coal pillar was determined as 5m. The industrial test showed that the roadway position and width of narrow coal pillar were scientific and reasonable, and favorable technical and economic effects were achieved.
Keywords：gob-side entry divingnarrow coal pillarmain roofhanging roof lengthroadway stability
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 10-13 )