【摘要】 为研究减震沟的减震机理,基于爆破地震波中体波和表面波的传播特性,利用弹性波的反射和透射理论分别分析减震沟对体波、表面波的削弱作用,推导出修正后的质点振动速度公式并用来描述表面波的衰减规律。应用ANSYS/LS-DYNA模拟台阶爆破,通过对有减震沟和无减震沟时岩体内部测点和表面测点质点振动速度对比分析,验证了分开考虑体波和表面波的合理性。研究结果表明:体波的衰减与减震沟的深度和宽度都有关,其中减震沟的深度对体波的衰减起主要作用;表面波的衰减仅与减震沟的深度有关,减震沟的宽度对表面波没有影响。更多还原

【Abstract】 In order to study the absorption mechanism of damping bitch,the absorption effect of damping bitch to body wave and surface wave was analyzed by reflection and transmission theories based on the propagation property of body wave and surface wave.The particle vibration velocity formula was deduced to describe the attenuation of surface wave.The bench blasting was simulated by taking advantage of the finite element ANSYS/LS-DYNA software.The particle vibration velocity of inner and surface measured point without the damping bitch or not was analyzed and compared.The rationality of considering the effect of damping bitch to the body wave and surface wave separately was verified.The results show that the decay of body wave both concerns with the depth and width of damping bitch,the depth of damping bitch plays the main role,the decay of surface wave only concerns with the depth of the damping bitch.更多还原