Modeling of gas extraction from closed coal mines

Candice Lagny; Zbigniew Pokryszka; Marc Prince

Modeling of gas extraction from closed coal mines

Candice Lagny ¹ Zbigniew Pokryszka ¹ Marc Prince ²

1 INERIS - Institut National de l'Environnement Industriel et des Risques

Abstract : The closed coal mines carry on releasing firedamp. In some cases, the quantity of gas released is not negligible and it can induce an overpressure in old works. A means to avoid hazards related to these gas emissions at the surface is to put in drainage installations and to keep the pressure of the underground reservoir under the atmospheric one. This practice has been used in several mines in France like in the Lorraine basin. A mathematical model has been developed by INERIS in order to improve operation of such installations. This model needs to determine 4 main parameters of reservoir. After its calibration, it is possible to forecast daily variations of pressure and methane content in drained gas as a function of daily extracted gas flow rate. Validations were made for several years. This model is able to evaluate firedamp quantity which may be extracted for a givent period to characterize the extraction conditions allowing an optimal production and its durability.

Document type :

Conference papers

Domain :

Sciences of the Universe [physics] / Earth Sciences

Environmental Sciences

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https://hal-ineris.archives-ouvertes.fr/ineris-00976156
Contributor : Gestionnaire Civs <>
Submitted on : Wednesday, April 9, 2014 - 4:41:53 PM
Last modification on : Wednesday, April 9, 2014 - 4:41:53 PM
Long-term archiving on : Wednesday, July 9, 2014 - 1:06:39 PM

2004-148_hal.pdf

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