Experiment Study on Blasting Technology with Medium Depth Borehole in Mine Large Cross Section Rock Rise
ZONG Qi
WANG Chuan-bing
WANG Hai-bo
Abstract：A mine -450~ -610m belt conveyor rise in East No.2 C group of Xieqiao Mine had a length of 701.639m ,inclination of 12° and heading cross section area of 20.1m2.In order to improve a heading efficiency of the large cross section rise and in combination with a site engineering actuality ,a study and site experiment was conducted on a blasting borehole depth ,blasting borehole diameter ,cartridge diameter ,blasting borehole pattern and other medium depth borehole blasting parameter ,cutting mode and cutting parameters ,smooth blasting parameters and smooth blasting charge structure ,floor borehole blasting parameters and floor control ,rational detonating method and others and an excellent effect was obtained. An utilization rate of the boreholes was improved from a previous 81.36% to 90%and the consumption of the blasting material and blasting boreholes was reduced somewhat. The pe-riphery smooth blasting effect of the mine roadway was excellent ,an overbreak-underbreak was less and a profiling quality was high. A lump size of the broken rock was even ,a muckpile was quite con-centrated and thus a rock loading time utilization rate and rock loading efficiency of the rock loader were effectively improved. The quality of the borehole drilling was high ,the floor control of the mine roadway was good and a floor falling phenomenon was eliminated.
Keywords：mine rock riseblasting with medium depth boreholeblasting parametersexperiment study
Publication Date：2014-06-06
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 34-37 )