Controlled blasting technology of slope contour forming with joint fissure development
Based on the construction practice of slope contour pre-splitting blasting in Hamu Nickel-cobalt Open-pit Mine in summer,the article introduces the causes of quality defects of slope contour forming under the condition of joint fissure development such as arc section,broken section or corner section.By reducing the distance between pre split holes,reasonably controlling the amount of line charge,optimizing the charge structure,initiating sequence,delay time and other technical measures,the article carries out the process control of drilling construction and charging construction.The overall residual half-hole ratio of slope contour forming is increased from less than 50%to 87.5%,which effectively control the contour forming quality of slope with joint fissure development.
joint fissureslope contourcontrolled blastinghalf porositydelay time
万方数据
维普
