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Abstract

Summary

To improve safety in coal mine, particularly around roadway, non-destructive and cost-effective seismic methods need to be developed. We focus our research on dispersive waves which propagate inside the coal seam in the vicinity of the roadway. We call it tunnel-channel waves (TC-waves). We demonstrate how the group velocity and frequency of the dominant energy of TC-waves behave based on finite-difference 3D numerical modelling and confront it with a dataset recorded in the Rydułtowy coal mine in Poland. We observe connection between investigated parameters and velocity anomaly in the numerical model as well as rock mass deformation due to past exploitation in the mine.

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/content/papers/10.3997/2214-4609.202020024
2020-12-07
2024-04-25
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