Research on the Impact of Blasting Vibration in Mining Areas on Surrounding Railway Structures

To study the safety impact of open-pit blasting on railway structures, blasting vibration tests were conducted on the railway. Numerical simulation methods were employed to establish a three-dimensional finite element model of the railway structure, encompassing the rail, sleepers, and subgrade. By applying the measured blasting vibration waves from the railway platform and amplifying their velocities to various multiples, the variation patterns of the vibration velocity and displacement of the railway structure were calculated and analyzed. The research findings suggest that the rail in the railway structure is less affected by the vibration, whereas the sleepers and subgrade are more significantly influenced by the blasting vibration. The peak velocities and displacements generated by the structure are well below the requirements of the relevant regulations. Upon amplifying the loading velocities to different multiples and conducting the analysis, it was observed that as the vibration velocity increases, the velocity and displacement of the structure increase to varying extents. It is recommended to control the blasting vibration velocity below 3 cm/s and to adopt corresponding security technology measures.