Application of Gas Drainage by Oblique Cross Boreholes in Air Return Gateway in Dalong Coal Mine
YU Zhijin
JIANG Qingwei
ZHANG Leilin
Abstract：This paper analyzed the gas source in S1 1201 working face and the gas distribution in its gob in Dalong Coal Mine, it came to the conclusions that the large gas emission from the lower adjacent coal seam to S11201 working face is the main cause of abnormal gas emission in this face. For this reason, the technology of gas drainage from the cracked zone in the gob by“oblique cross boreholes in air return gateway” was put forward, the use of this technology got an ideal drainage effect and ensured the safe mining of this working face.
Keywords：gobgas emissionoblique cross boreholessafe mining
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 54-57 )