MULTIPLE BLASTING TECHNIQUES FOR EXPLOITATION OPTIMIZION OF JINSHAN TEMPLE IRON MINE

In order to achieve high speed exploitation of Jinshan temple open iron mine,optimal exploitation multiple blasting techniques are proposed,which solve the technical difficulties,such as ore block degree controlling,stope slope stability controlling and sporadic veins high efficient exploitation,so as to obtain good effect.Firstly,the Kuz-Ram mathematical model is used to establish explosives consumption prediction model to control the rate of ore chunk.Combined with practical engineering geological conditions,the reasonable explosive consumption to control the blasting ore block of Jinshan temple iron mine controlled blasting is calculated.Secondly,in order to reducing explosive using,the slope pre-splitting blasting of original design is changed into buffer blasting.By adjusting the amount of explosive charge and charging structure to control production blasting damage to the adjacent end slope,reducing construction cost and satisfying the requirements of slope safety at the same time.Finally,aiming at the dispersive characteristics of ore body,the segmented blasting mining,in-situ blasting techniques are used to reduce the ore dilution and loss rate,and reduce the waste of resources.Multiple usages of various blasting techniques open a new way for the efficient exploitation of small and medium-size mines.