DOI: 10.11799/ce201711006
Fully mechanized top-coal caving technology with less bottom coal retained above high-stress and strong-expandable mudstone floor
ZHANG Lian-liang
ZHANG Yu-jun
WANG Hong-tao
SUN Wen-liang
CHU Wei-zhong
Abstract：Aiming at the serious coal loss as 2m thick bottom coal was left in the coal mining at Tingnan Coal Mine,the floor rock characteristics and the floor expansion performance classification of the 304 fully mechanized coal face are analyzed.And the key technology is analyzed for top-coal caving with less bottom coal retained,from roadway layout,roadway support method and mining technology.Finally,layout of the 2.0m bottom coal is determined for Tingnan Coal Mine 304 working face mining roadway,which cut 1.5m of the bottom coal,with 0.5m coal retained for working face advancement.The results showed that,by adopting this method,more than 620 thousand tons resources were recovered in the 304 face,accounting for 25.7％ of the 2.0m bottom coal resources,which greatly improved the economic benefits.
Keywords：high stressstrong-expandable mudstonebottom coal cuttingfully mechanized top-coal miningrecoverable reserve
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 21-24 )