Minimum advancing speed of coal face for fire prevention of goaf at different air supply volume

作者：Liu Wei^*; Qin Yue Ping; Yang Xiao Bin; Gui Tian Zhu; Hao Yong Jiang

来源：Journal of Northeastern University, 2013, 34(SUPPL.1): 99-103.

• Coal spontaneous combustion
• Critical temperatures
• Energy balance equations
• Goaf
• Highest temperature
• Numerical computations
• Numerical simulating
• Workface

In order to study the influences of air supply on working face on the minimum safe advancing speed, the spontaneous combustion mathematical model was established using moving coordinates for goaf. Then the numerical computation software was programmed by means of finite volume method. The relationship between the highest temperature, the air volume and advancing speed was got through numerical simulating. According to the expression, the speed which corresponded to the critical temperature of coal spontaneous combustion and the air volume in site was taken as the minimum safe advancing speed. The energy balance equation of goaf was established to judge the rationality of the minimum safe speed, and the unreasonable value should be amended. The results showed that the minimum safe advancing speed increases with the increase of air supply.

• 出版日期2013
• 单位中国矿业大学（北京）