Studying the dynamic response of support systems under blasting impact holds significance for ensuring the safety of underground space and roadways. Thin spray-on Liner (TSL), an innovative roadway and tunnel support material, has gained considerable global attention. However, the effects of the blasting vibration amplitude on its dynamic response remain unclear. This study, employing 14 on-site blasting tests with varying charges, generated distinct amplitudes of blasting vibrations on the TSL. Subsequently, by refining the on-site blasting dynamic data testing environment, measurements were obtained for the dynamic displacements, dynamic strains occurring on the TSL spray-on layer surface, and dynamic pressures generated within the layer. The test results demonstrate that the blasting vibration amplitude influences the peak values and peak loading rates of the dynamic signals. Specifically, the dynamic displacement and tensile strain peaks exhibit a linear positive correlation with the blasting vibration amplitude. Meanwhile, the dynamic pressure peaks show a nonlinear positive correlation with the vibration amplitude. The peak loading rates of the dynamic displacement and dynamic pressure increase with the augmentation of the vibration amplitude. The relationships between dynamic displacement peaks, dynamic tensile strain peaks, dynamic pressure peaks, and explosive charge quantity, as well as the distance from the explosive source, can be adequately described using power functions. The permissible blasting vibration velocity for TSL support can be ascertained through the relationship between dynamic displacement, dynamic strain, and vibration amplitude, offering a reference for blasting vibration protection in roadway support involving TSL.

研究爆破冲击下支护系统的动力响应对于保障地下空间和巷道安全具有重要意义。薄喷涂衬垫（TSL）是一种创新的道路和隧道支护材料，已引起全球的广泛关注。然而，爆破振动幅度对其动力响应的影响仍不清楚。这项研究采用了 14 次不同装药量的现场爆破测试，在 TSL 上产生了不同的爆破振动幅度。随后，通过完善现场爆破动态数据测试环境，测量了TSL喷涂层表面的动态位移、动态应变以及层内产生的动态压力。测试结果表明，爆破振动幅度影响动态信号的峰值和峰值加载率。具体而言，动态位移和拉应变峰值与爆破振动幅度呈线性正相关。同时，动压力峰值与振动幅度呈现非线性正相关关系。动位移和动压力的峰值加载速率随着振动幅度的增大而增大。动态位移峰值、动态拉伸应变峰值、动态压力峰值和炸药装药量以及距炸药源的距离之间的关系可以使用幂函数来充分描述。通过动位移、动应变和振动幅值之间的关系，可以确定TSL支护的允许爆破振动速度，为TSL巷道支护爆破振动防护提供参考。