At the Provence colliery, France, the remote microseismic monitoring used for the prevention of dynamic phenomena is an integral part of a strategy for exploring zones where there are risks of violent instability or rockbursts. Precise location, in real time, of the hypocentres associated with daily microseismic activity is one of the main objectives in the interpretation of data to optimise countermeasures. A study has been carried out with the purpose of calibrating an inclined wave propagation multilayered model. This article describes the operational microseismic monitoring network, the method used to calibrate the velocity model, the results obtained and the undeniable contribution which it makes to the quality of data interpretation.

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