Numerical Study on Thermal Environment in Mine Gob Under Coal Oxidation Condition

• Authors: Yanming Wang , Guoqing Shi , Deming Wang
• Languages of publication: EN

Abstracts

EN

The most feared of hazards in underground mines are those of fires and explosions. This study focuses on the temperature-rising process of residual coal under spontaneous combustion condition in coal mine gob. A numerical model has been established considering the chemical reaction, heat transfer and components seepage flow. The temperature distributions and maximum values for different positrons at various times have been calculated by using the coupled model. An experimental model has been also developed for model calibration. The validation indicates the numerical model is accurate and suitable for solving the temperature-rising problem in coalmines. The simulation results show that high temperature zone appears at the air intake roadway side in the gob and enlarging the ventilation flux increases the risk of self-ignition of coal. The research results can be used to predict the temperature-rising of coal spontaneous combustion and coal resources prevention.

PL

Pożary i wybuchy stanowią największe zagrożenia w kopalniach. Opisane w pracy badania dotyczą procesów powodujących wzrost temperatury resztkowego węgla, doprowadzający do jego samozapłonu, w odpadach z kopalni. Model numeryczny sformułowano, biorąc pod uwagę reakcje chemiczne, wymianę ciepła i przepływy składników. Rozkłady temperatury i maksymalne wartości w różnych położeniach i w różnych czasach zostały obliczone z użyciem modelu sprzężonego. Do kalibracji został również opracowany model doświadczalny. Walidacja wykazała, że model numeryczny jest dokładny i odpowiedni do rozwiązania problemu wzrostu temperatury w kopalniach węgla. Wyniki symulacji wskazują, że strefa podwyższonej temperatury pojawia się na szlakach wlotu powietrza do materiału i zwiększenie strumienia wentylującego zwiększa ryzyko samozapłonu węgla. Wyniki badań mogą być wykorzystane do przewidywania wzrostu temperatury grożącego samozapłonem węgla oraz do ochrony jego zasobów.

Keywords

EN

mine environment; residual coal; temperature rise process; spontaneous combustion

PL

środowisko kopalni; pozostałości węgla; proces wzrostu temperatury; samozapłon

• Publisher: De Gruyter Open
• Journal: Ecological Chemistry and Engineering S
• Year: 2013
• Volume: 20
• Issue: 3
• Pages: 567-578

Dates

published

1 - 09 - 2013

online

08 - 10 - 2013

Contributors

author

Yanming Wang

• School of Safety Engineering, China University of Mining and Technology, XU-ZHOU City, China

author

Guoqing Shi

• State Key Laboratory of Coal Resources and Safe Mining, XU-ZHOU City, China

author

Deming Wang

• Key Laboratory of Gas and Fire Control for Coal Mines, XU-ZHOU City, China

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Identifiers

DOI

10.2478/eces-2013-0041