The Effect of Joint Condition on Rock Fragmentation in Bench Blasting

절리간격과 방향이 벤치발파시 암석파쇄도에 미치는 영향에 대한 실험 연구

  • 최용근 (㈜지오제니컨설턴트) ;
  • 이정인 (서울대학교 지구환경시스템공학부)
  • Published : 2005.06.01


Recent studies reported that natural block size of rock and joint orientation highly affect on rock fragmentation. In this study, blasting test using high strength cement mortar was carried out to verify this fact. The result of this test indicated that fragmentation is influenced by the joint interval, and at same joint interval condition, fragmentation depends on joint orientation. These results are significantly coincident with field investigations.


rock fragmentation;joint spacing;joint direction;in-situ block size;bench blasting


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  2. Rustan, A, 1990, The importance of using joints to achieve scaled fragmentation in magnetite concrete used for sublevel blast models, Engineering Fracture Mechanics, Vol. 35, No. 1/2/3, pp. 425-438