On The Technique Maintaining Along The Roadway In The Goaf By Packing With High-water Materials

In this paper, Yunjialing mine 12303 working face transportation lane for background, fill the next high Roadway along goaf technology. Dissertation, theoretical analysis and engineering examples of the way, on the next lane filling body and Gob-force and deformation characteristics at different stages of mining are analyzed, obtained for Gob high water filling body position and a more reasonable way understanding of the law by filling body characteristics and other forces. Laboratory experiments using methods mastered the material under high water-cement ratio of 1.8 cases of initial setting time, strength with curing time-varying characteristics and failure characteristics and other characteristics, the experimental results can be selected next lane filling body size parameters, the next area reference section roadway design. Finally, field measurement, filling body for next lane during mining face were measured force analysis to verify the lane next to the ratio of filling material selection, rationality size parameters, conclusions for the next section of mining face, roadway and provide a theoretical basis for Gob.This paper shows that, beside high Roadway filling key for Gob technology is chosen lane beside filling body size parameters and filling materials. The technology sector coal pillar canceled, isolation of water and waste rock mined-out area, while also eliminating the risk of spontaneous combustion coal, improve the economic efficiency of the mine.