爆破引起岩体损伤的判别方法研究STUDY ON THE CRITERION OF ROCKMASS DAMAGE CAUSED BY BLASTING
朱传云,喻胜春
ZHU Chuan yun,YU Sheng chun (Wuhan University,Wuhan 430072,China)
摘要(Abstract)：
依据弹性波理论 ,在假定爆破前后岩体的密度、泊松比近似相等的条件下 ,建立了声波的波降率 (η)、岩体的完整性系数 (Kv)以及弹性模量损失系数 (D)三者之间的关系 ,这为弹性模量损失系数 (D)的测定或计算提供了一种工程经验的途径。在上述关系式的基础上 ,以水电工程中边坡及基础爆破开挖为实例 ,对所建立的关系式进行了损伤标准的应用性探讨 ,由此提出了关于工程破坏损伤判据及可以接受的工程损伤判据概念
According to theory of elastic wave and under the condition of assuring that the densities and poisson’s ratios of a rockmass before and after blasting are approximately equal,a relationship between the reduction ratio(η) of sound velocity,the coefficient (K v) of rockmass integrity and the loss coefficient (D) of elastic modulus has been established It can be used as an empiric way for the determination or calculation of D. Based on the above mention relationship,the application of rockmass damage standard is discussed through taking excavation blasting of the slope and basement in hydroelectric projects as an example In view of the above,a concept on rockmass damage in blasting projects and the acceptable damage criterion are proposed
关键词(KeyWords)：
爆破;岩体损伤;声波速度;损伤判据
Blasting; Rockmass damage; Sound velocity; Damage criterion
基金项目(Foundation):
作者(Author):
朱传云,喻胜春
ZHU Chuan yun,YU Sheng chun (Wuhan University,Wuhan 430072,China)
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