CAJ | 학술논문

岩体爆破损伤具有时变累积特性，且爆破损伤增量大小是以本次爆破作用前岩体宏观力学参数水平为前提，据此对经典爆破损伤计算公式进行改进。工程应用情况表明：岩体爆破损伤经典算法的计算结果偏于保守，在一定程度上会阻碍爆破开挖效益最大化；爆破损伤改进算法可反映岩体内部孔洞、裂隙等缺陷在爆破动荷载作用下的闭合、密实现象，且更能体现岩体中声波速度的变化幅度，其工程应用效果良好。
암체폭파손상구유시변루적특성，차폭파손상증량대소시이본차폭파작용전암체굉관역학삼수수평위전제，거차대경전폭파손상계산공식진행개진。공정응용정황표명：암체폭파손상경전산법적계산결과편우보수，재일정정도상회조애폭파개알효익최대화；폭파손상개진산법가반영암체내부공동、렬극등결함재폭파동하재작용하적폐합、밀실현상，차경능체현암체중성파속도적변화폭도，기공정응용효과량호。
Considering the time‐varying cumulative characteristics of rock blasting damage and the val‐ue of damage increment w hich depends on the macro‐mechanical parameters of rock mass before cur‐rent blasting effect ,this paper improves the classical formula for calculating blasting damage .The en‐gineering application show s that the classical method obtains conservative results ,w hich may hinder the maximum benefits of blasting excavation .The new method can reflect the closure and densifica‐tion phenomenon of micro‐cracks and holes in rock mass under the dynamic blasting loading ,and em‐body the change amplitude of acoustic wave velocity in rock mass .So the improved formula for blas‐ting damage has better application effect .