Support Technology of Mine Large Cross Section Roadway in Watery Soft Rock
XIA Yu-jun
ZHANG Hai-liang
GUO Lei
CHEN Guang-yin
Abstract：The north wing railway roadway in New Shanghai No.1 Mine was a soft rock roadway with a large heading cross section.Previously ,a“bolt-steel mesh-shotcreting +anchor+29U steel truss+re-shotcreting” combined support was applied and primary support was a bolt-steel mesh-shotcreting+anchor.After 15 days of the primary support applied ,there were roof subsidence and floor heave phe-nomena occurred in the roadway.With the continuous discovery and practices ,a combined support with“bolt-steel mesh-shotcreting +anchor+single layer reinforced bar mesh reverse arch + reinforced con-crete liner+backfill grouting” was replaced and conducted with two operations.Thus the roadway de-formation was effectively controlled and the construction speed was speeded up.The average month heading rate of the mine roadway was increased from previous about 50m to 75m and an expected effect was reached.
Keywords：watery soft rockmine railway roadwaysupportbolt-steel mesh-shotcretingreverse arch
Publication Date：2014-04-15
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 4-6 )