Abstract
Deformation of Lead plate blast pressure meter were measured after they were exposed to surface blasting. Blasting pressure was determined by comparing the data with calibration graph which was drawn from the laboratory experiments with gas gun of Hopkinson bar tester. The results were compared with calculated values from the equations of CONWEP (Conventional Weapons Effects Program) and DDESB (Department of Defence Explosives Safety Board). Measured values were lower than calculated values in near field. Gradual decaying tendency of the pressure was observed. It means that estimated blasting pressure of very near field with theoretical equations can be uncertain.
노천에서 폭파실험을 통해 납판 발파압계의 변형량을 계측하였다. 홉킨슨 바 시험장치의 가스 건으로 압력 실험하여 구한 보정 그래프에 계측데이터를 적용하여 폭풍압을 산출하였다. 그 결과를 CONWEP, DDESB 등 여러 가지 폭풍압 예측식과 대비하였다. 근거리 폭풍압의 실 계측 값은 폭풍압 예측식의 결과보다 최대압력이 낮게 나타났지만 거리에 따른 압력감쇠는 폭풍압 예측식보다 완만한 것을 확인할 수 있었다. 이는 기존 이론식으로 추정한 초근접 지점의 발파압은 부정확함을 의미한다.
