The shock wave generated after underground blasting might lead to severe catastrophe or irreparable destruction of adjoining underground and ground structures. To investigate the dynamic response of rock masses and adjacent underground openings and induced ground vibrations subjected to underground blasting, a sequence of laboratory tests was implemented with explosive charges and cement mortar blocks. The results show that not only the charge loading density but also the joint orientation affect the ground peak particle velocity (PPV) in a significant way, as well as the first peak strain at the neighbouring opening and in the surrounding rock masses. The first peak strain of the rock masses has a rising tendency with increasing charge loading density or decreasing scaled distance. The PPV on the ground clearly increases with increasing charge loading density. The first peak strain of the rock masses and ground PPV are dominated by the wave path, which is determined by the relative locations of the explosion source, measuring point and joints. The principal frequency of ground vibrations shows an increasing trend with increasing joint orientation, while the charge loading density slightly impacts the principal frequency. These research findings could enhance the comprehension of blasting wave propagation through jointed rock masses and contribute to the stability evaluation of aboveground and underground structures subjected to underground explosions.

地下爆破后产生的冲击波可能导致严重的灾难或对相邻的地下和地面结构造成无法挽回的破坏。为了研究岩体和邻近地下孔洞的动态响应以及地下爆破引起的地面振动，使用炸药和水泥砂浆块进行了一系列实验室测试。结果表明，不仅电荷加载密度而且节理方向都会显着影响地面峰值粒子速度 (PPV)，以及相邻开口处和周围岩体中的第一峰值应变。岩体的第一峰值应变随电荷加载密度的增加或标度距离的减小有增大的趋势。地面上的 PPV 明显随着电荷加载密度的增加而增加。岩体和地面PPV的第一峰值应变受波程支配，波程由爆源、测点和节理的相对位置决定。地面振动的主频率随着关节方向的增加呈增加趋势，而电荷加载密度对主频率的影响很小。这些研究成果可以加强对爆破波在节理岩体中传播的理解，并有助于地下爆炸作用下地上和地下结构的稳定性评估。测量点和接头。地面振动的主频率随着关节方向的增加呈增加趋势，而电荷加载密度对主频率的影响很小。这些研究成果可以加强对爆破波在节理岩体中传播的理解，并有助于地下爆炸作用下地上和地下结构的稳定性评估。测量点和接头。地面振动的主频率随着关节方向的增加呈增加趋势，而电荷加载密度对主频率的影响很小。这些研究成果可以加强对爆破波在节理岩体中传播的理解，并有助于地下爆炸作用下地上和地下结构的稳定性评估。