| 摘要 |
<p>The present invention relates to an excavation method for reducing vibration and increasing an excavated length during tunnel excavation. More specifically, the present invention is capable of increasing an excavated length and reducing vibration and increasing the excavated length during tunnel excavation for reducing vibration and a noise. The blasting method comprises the steps of: forming an empty hole (100) drilling a large caliber boring hole; continuously blasting toward an upper side and the lower side and the right side and the left side around a center blasting expansion hole (200) and a crack induction hole (300) and an upper blasting hole (400) and a lower blasting hole (500) formed in a lower portion of a center blasting expansion hole (200) and the empty hole (100). Therefore, a neo-smooth blasting method is applied to a periphery of the empty hole (100) to enable blasting, and the present invention secures a free surface toward the front side of the excavation surface.</p> |
