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2013 | 20 | 3 | 567-578

Article title

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


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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.
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.









Physical description


1 - 09 - 2013
08 - 10 - 2013


  • School of Safety Engineering, China University of Mining and Technology, XU-ZHOU City, China
  • State Key Laboratory of Coal Resources and Safe Mining, XU-ZHOU City, China
  • Key Laboratory of Gas and Fire Control for Coal Mines, XU-ZHOU City, China


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