Control Of The Ore Block Dahongshan Copper Longhole Blasting

A high rate of bulker output, most panels are in16.0%～24.0%, is leaded by the sector medium-length hole blasting in Dahongshan copper mine, and the rate of some panel is so far as to more than31.0%. There are more than60percents of the production of Dahongshan copper mine which is producted by sector medium-length hole blasting. In the way of sector medium-length hole blasting, the unit consumption of secondary blasting and the rate of bulker output both have close connection with index of the annual production target and the operating profitsBased on the research project of research on control technology system of the orelumpiness breaken down by sector medium-length hole blasting in Dahongshan copper mine, A site test was taken mainly encompassing the basic parameters which are the distributed bottom drift, the infuluence of explosive performance and explosives to rock, the infuluence of gun mud plugging to blasting effect, loading density and specific charge. Aimed at debasing the rate of bulker output in sector medium-length hole blasting, the thesis proposes a effective method by integrating theory with field study. Besides, the control target of the rate of bulker output is also maped out which is helpful for ascertaining the blasting parameter in actual production.