Research and practice on the increase of product recovery rate under more complicated condition for hydraulic mining coal faces

Machine mining method is not suit to the I₅ west section of Kongzhuang mine since the section's fault and the roof cranny so developing that easy to fall.In this paper,mining method and working face optimize design were researched and decided adopting hydraulic method to exploit complex conditions coal resource.In-situ industry experiment indicated that aqility hydraulic mining method can suit to complex coal resource condition,reclaim side corner and fault coal resource effectively.and the result is mining more 40000 tons coal than commonly mining method in the I₅ west section.