DOI: 10.11799/ce202311038
Application of gob-side entry retaining in Shangwan Coal Mine of Shendong mining area
ZHAI Chunbao
Abstract：In order to reduce the excavation work in coal mine tunnels and improve coal extraction rate,taking the 12upper coal seam of Shangwan Coal Mine as the research background,cost analysis,theoretical calculation and engineering examples of gob-side entry retaining was conducted.By comparing and analyzing the support technology and mine pressure laws of the three gob-side entry retaining working faces,namely,12Upper 307,12Upper 308 and 12Upper 309 working faces.A safe,economical,high-yield and efficient flexible formwork concrete rapid gob-side entry retaining was summarized to meet production needs.Research results show that the support technology is reliable and the gob-side entry retaining process is mature.The comprehensive profit of the three working faces is about 82.014 million yuan,and the resource recovery rate was increased by 6%to 7%.The economic benefits were favorable,providing reference for other mines in the Shendong mining area.
Keywords：gob-side entry retainingsupport designflexible formwork concrete pumpingsupplement support
Publication Date：2023-12-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 37-42 )