This paper present an evaluation of new drilling and blasting method with two different drilling directions for pilot tunnel enlargement using numerical experiment. That is, three dimensional transient dynamic analysis was made to investigate the effe...
This paper present an evaluation of new drilling and blasting method with two different drilling directions for pilot tunnel enlargement using numerical experiment. That is, three dimensional transient dynamic analysis was made to investigate the effect of the ground vibration when blasting was performed at same position using the equivalent single hole charge.