Magnitude Estimation of Low-yield Mining Blasts Using Distributed Acoustic Sensing (DAS)

This repository contains data and code used to calculate magnitudes of regional mining blasts using the FORESEE Array in State College, Pennsylvania. Using a full-waveform selection criterion, we calibrated a transferable scaling relationship between DAS measurements and event magnitude. Dataset figures Filename Description amplitude_vs_yield_log Plot of peak summed DAS strain rate versus event yield in log scale. A trendline is fit to the data with 95% confidence interval. model_results Results of magnitude estimation. DAS-based magnitudes are plotted versus the log of event yield for each mine location. compare_waveform_data Comparison of waveforms from two distinctly different mines (Shawville, left and Bellefonte, right). workflow Processing workflow used to clean DAS data for implementation into scaling calibration. surface_mine_model_calibration Results of calibrating the scaling relation for surface mines with catalog magnitudes. model_params/bfnt_pso Filename Description bfnt_params.mat .mat file of model parameters calculated using Particle Swarm Optimization for the Bellefonte mine. model_params/pgap_recalibration Filename Description pgap_recalibration_params Refit site term parameters to the Pleasant Gap Mine. Includes magnitude and distance coefficients along with slope and intercept of magnitude–yield relationship. site_terms_K_refit Contains only recalibrated site term (K). model_params/surface_calibration Filename Description site_terms_K_original Calibrated site terms using least squares regression. surface_calibration_params Fitted model parameters (a), (b), and (K_i) for the scaling relation. blast_data Folder Description surface_mine_calibration Contains cut DAS data used to calibrate surface mine model parameters. deep_mine_calibration Contains cut DAS data used to calibrate Bellefonte model parameters. validation_data Contains cut data for each surface mine with no catalog magnitude, used for validation. csv_files Filename Description paseis_events Catalog of mine blast events in the PASEIS catalog. blast_catalog Catalog of all mine blast events in the FORESEE database. DAS_UTM_csv Coordinates of DAS channels in the FORESEE Array. code Filename Description calibrate_relation.jpynb Code used to calibrate the scaling relation and plot the figure. cut_save_data.jpynb Code used to load DAS data and cut data. plot_figures_2-4.jpynb Code used to plot Figures 2 through 4. code/deep_mine_calibration Filename Description run_pso.mlx Performs Particle Swarm Optimization on Bellefonte data. bfnt_K.mat Contains site terms calculated for Bellefonte by PSO. coords.mat Contains the coordinates of DAS channel locations.