岩石中柱形装药爆破破坏区域的理论计算

摘要

为了解决柱形装药在岩石中爆破破坏分区的问题，在空腔膨胀理论的基础上，采用Mohr-coulomb强度准则作为爆破近区的岩石本构模型，修正空腔膨胀理论中的速度场关系式，建立了柱形装药在岩石中爆破的力学控制方程，结合爆破弹性区的准静力解，给出了爆炸空腔、破碎区和径向裂缝区半径的理论计算公式。最后以四种岩石为研究对象，根据得到的理论公式进行算例分析，计算结果与相关文献资料进行比较，证明了理论公式的正确性。%To deal with the problem of blasting breakage zones of cylindrical charge in rock,based on the theory of cavity expansion,the Mohr-Coulomb strength criterion was used to describe the rock constitutive model of rock near blast center,and the velocity fields in the theory of cavity expansion was also modified,then the mechanics con-trol equations of the rock blasting with cylindrical charge were established. Combined with the quasi-static solutions, the theory calculation formula about the radius of blasting cavity,the crushing zone and radial crack zone were pres-ented. Four kinds of rock were taken as research objects,and the theoretical calculation were verified by compared with other documents and materials.