The Xiaolongtan Open Pit Blasting And Blasting Vibration

This paper mainly studies the blasting technology and blasting vibration in Xiaolongtan,and explains millisecond blasting mechanism and reducing millisecond blasting vibration mechanism.Through investigation on the spot ,the writer presents an blastingtechnology studying method which mainly contains borehole psttern parameter,the selection of explosion of open extrusion blasting and open blasting in Xiaolongtan from the effect of blasting experiment,powdery emulsion explosive is better than emulsion explosion of 2(?) rock at improving blasting effect,and the influence of different charging construction on blasting results.Through the experiment of blasting parameters,this paper compares blasting effects and confirms the reasonable blasting parameters and chanrging comsteuction.The reduction of blasting vibration ,the weitoer present the experimental plan using the electronic detonator whose time interal plan suing the electronic detonator whose time interal is 100ms and electronic detonator on the high level of precision ,and analyzes wave form of blasting vibration in every millisecond. By an American scientist,Charles H.Dowding's experiment,the paper explains the reason why the speed of vibration in after burst part is faster than in driver unit,presenta the effect of surrounding on blasting vibration,work out that the magnification coefficient of blasting vibration is 1.05~1.99,applies dimensional analysis and regression analysis to calculate the formula of blasting frequency and the formula of blasting vibration speed ,and by power spectrum denseness analysis, further explains the relation between millseconfd time and frequency.