前言声波在均质岩体中传播的波速公式为:式中:V_p——纵波波速;V_s——横波波速;E——弹性模量;ρ——岩石密度;μ——泊松比。显然V_p、V_s 是μ、ρ、E 的函数,由于E、μ、ρ是反映岩体特性的指标,因此V_p、V_s 可作为衡量岩体力学特性的一种方法。当岩体存在裂隙、地应力、以及含水等情况时,就会改变原有的E、μ、ρ值,从而使V_p、V_s 发生变化。基于以上原理,波速可用以测定硐室周围 Preface The wave velocity formula of acoustic wave propagating in homogeneous rocks is: Where: V_p - P wave velocity; V_s - S wave velocity; E - Elastic modulus; ρ - rock density; μ - Poisson's ratio. Obviously V_p and V_s are functions of μ, ρ and E. Since E, μ and ρ are indicators reflecting the characteristics of rock masses, V_p and V_s can be used as a method to measure the mechanical properties of rock mass. When there are fissures, ground stress and water in rock mass, the original E, μ and ρ values ​​will be changed, so that V_p and V_s will change. Based on the above principle, the wave velocity can be used to measure the chamber around