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为保证爆破震动作用下各种地下硐室的稳定性,参考模型试验,利用波的函数展开法分析了爆炸震动入射角、频率和洞径对震动速度的影响.研究结果表明:当硐室受到拱顶正上方平面波作用时,拱顶径向震动速度是4个测量数据中最大的,当入射方向从拱顶向左侧偏移至水平方向,迎爆侧的径向速度都比背爆侧的径向速度大,当入射方向在拱顶时,切向震动速度从拱顶至侧墙是先增加后减小,入射方向在拱腰处,拐角的切向震动速度应该注意;随着频率的增加,震动径向速度和切向震动速度都相应增大;在迎爆侧,硐室洞径越大,径向震动速度和切向速度越大;在背爆侧,硐室洞径越大,径向震动速度和切向速度越小.
In order to ensure the stability of various underground chambers under blasting vibration, the effect of blasting vibration angle of incidence, frequency and hole diameter on vibration velocity was analyzed by using the function of wave function. The results show that when the chamber is affected When the plane wave just above the vault is applied, the radial vibration velocity of the vault is the largest of the four measured data. When the incident direction is deviated from the vault to the left to the horizontal direction, the radial velocity on the blast side is higher than that on the dorsal side When the incident direction is at the vault, the tangential vibration velocity first increases and then decreases from the vault to the side wall. When the incident direction is at the arched waist, the tangential vibration speed of the corner should be noticed; as the frequency The radial velocity and the tangential velocity of vibration are correspondingly increased. On the blast side, the larger the chamber hole diameter is, the larger the radial vibration velocity and the tangential velocity are; Large, radial vibration speed and tangential speed smaller.