DOI: 10.11799/ce201603013
Gob-side entry retaining with roof cutting pressure releasing in central seam of high gas coal seam group
TANG Zhao-jun
SHENG Jian-fa
SONG Run-quan
ZHANG Guo-feng
Abstract：According to the engineering geological conditions of the central coal seam in high gas coal seam group in Baijiao mine, the paper proposes and practices the non-pillar mining technology of gob-side entry retaining with roof cutting pressure releasing, studied the processes of retained roadway reinforcement support, roof cutting roadway formation and goaf fire prevention and extinguishing. Research shows that, using roof cutting pressure releasing technology, the integral roof of goaf is divided through blasting roof cutting, realizing stress division of goaf collapse zone and roadway retaining zone, the new roadway rib forms as goaf roof fell in the un-retained part under periodic weighting, and the 2443 machine roadway is retained, fundamentally solving the technical difficulties of stress concentration, gas outburst, coal pillar fire, etc., in coal pillar retaining in high gas coal seam group mining process.
Keywords：non-pillar mininghigh gas coal seam grouproof cuttingpressure reliefgob-side entry retaining
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 39-41,45 )