<abstract xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></abstract>

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.

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

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

Ecological Chemistry and Engineering S

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...

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

Pubblicato online: 08 ott 2013

Pagine: 567 - 578

DOI: https://doi.org/10.2478/eces-2013-0041

This content is open access.