Modeling Seismic Vibrations under Massive Blasting in Underground Mines
A. N. Kholodilov1, A. P. Gospodarikov2
1Saint-Petersburg State University of Airspace Instrument Engineering, Saint-Petersburg, 190000 Russia
2Saint-Petersburg Mining University, Saint-Petersburg, 199106 Russia
Keywords: Взрывные работы, велосиграмма, сейсмическая безопасность, сейсмовзрывные колебания, подземный рудник, надшахтные сооружения, прогноз сейсмического воздействия, эллиптический фильтр, Blasting, velocigram, seismic safety, blast-induced seismic vibrations, underground mine, installations above ground, seismic load prediction, elliptical filter
Abstract
The theoretical model is proposed, which allows tracing continuation of seismic vibrations after cessation of blast effect by the analysis of velocigrams recording on ground surface during underground explosions. The comparison of the model and experimental velocigrams of massive blasts shows validity of elliptical filters for second-order low frequencies in modeling waveforms of the velocigrams. The model efficiency in the detection of time-delay errors is proved. The conditions of predicting peak particle velocities based on explosive weight per blast are determined. The pre-conditions for the resonance excitation in the rock mass-guarded object system are discussed, and the blast-induced load is predicted.
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