Impact of High Energy Mining-Induced Seismic Shocks from Different Mining Activity Regions on a Multiple-Support Road Viaduct

Abstract

In this paper, the dynamic responses of a large-scale multiple-support road viaduct to mining-induced seismic events registered in two regions of mining activity were compared. The regions differ in geological structure, which results in discrepancies in the dominant frequency content. Spatial variation of ground motion causing the kinematic excitation non-uniformity was accounted for in the dynamic analyses of this large-scale structure. Non-uniform mining-induced kinematic excitation models were proposed, with respect to the specificity of mining origin quakes. The dynamic performance of the viaduct was determined using three different methods of calculation: the time history analysis, the response spectrum analysis, and the multiple support response spectrum analysis. Both the uniform and non-uniform kinematic excitation models were adopted for the dynamic performance assessment. The research revealed that the dynamic response of some members of the structure, determined using the non-uniform excitation model, was significantly greater than that obtained for the uniform one. Hence, in the dynamic analysis of multiple-support structures under mining-induced events, the effect of spatial variation of ground motion should be considered. The study pointed out that the commonly used response spectrum analysis may lead to the underestimation of the dynamic response of large-scale multiple-support structures. Instead, the multiple support response spectrum method, which takes into account the non-uniformity of ground motion, is recommended as a conservative approximation. This method provides a safe upper estimation of the full-dynamic analysis results of large-scale structures under mining-induced tremors. Finally, the research indicated that the dynamic performance of a structure strongly depends on the frequency range attributed to a specific mining region. The dynamic performance of identical engineering structures under tremors of similar maximal amplitudes may differ significantly due to discrepancies in frequency contents of shocks occurring in various mining regions.

Coal Mining Sustainable Development: Economics and Technological Outlook

“…Boro ń et al [6] show uniform and non-uniform kinematic excitation models adopted for assessment of mining-induced seismic events that are dangerous for large-scale structures in mining clusters. Induced earthquakes are considered in the article as long-term consequences of continuous mining, and the effect of spatial variation of ground motion is explored.…”

The analysis of the currently used systems related to the monitoring of the mining production process

“…Aramis M / E seismic system. It enables detection, digital recording and buffering of seismic quakes transmitted from the bottom of the mine and their further processing (in terms of their localization and energy calculation), visualization and archiving [11,22]. Figure 1 shows an example of a plot of a seismic tremor recorded by the Aramis program.…”

Advanced Model of Spatiotemporal Mining-Induced Kinematic Excitation for Multiple-Support Bridges Based on the Regional Seismicity Characteristics

“…The authors of dynamic analyzes usually assume that the movement of the structure supports is the same. However, in the case of multi-support constructions, a simplification such as the omission of the space-time complexity of the excitation may lead to inaccurate approximations and even errors, including non-conservative results that do not ensure the safety of the structure [10,11].…”