Research on surrounding rock support technology for roadways under the influence of coal pillars at the boundary of goaf in coal seams
TIAN Jun
LIU Chao
LEI Shuisheng
PENG Rui
ZHENG Di
LIU Jiang
YANG Xuehong
Abstract：To study the impact of residual boundary coal pillars on the layout of lower coal seam tunnels after goaf extraction in the upper coal seam.In this paper,numerical simulation,theoretical analysis and field obser-vation are used to study the stress distribution and support scheme of surrounding rock in lower coal seam road-way.The research results show that after the excavation of the lower coal seam roadway,under the vertical con-centrated stress of the upper coal pillar,there are obvious stress concentration areas in the surrounding rock of the two sides,with a peak stress of about 2.4 times the original rock stress,and a large deformation of the sur-rounding rock;The anchor mesh cable combined support scheme is suitable for the surrounding rock of the low-er coal seam roadway under the influence of coal pillars.The overall deformation of the surrounding rock is significantly reduced,and the support effect is good.The research results have good guiding significance for the design of support for close range coal seam mining.
Keywords：goafclose range coal seamssupportnumerical simulationsurrounding rock
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：8( 12-19 )