摘要
以有源风网矿井通风和火灾研究新成果为理论基础,建立了矿井火灾时期矿井通风系统灾变过程的数学模型,用MATLAB语言编制了可视化仿真程序TF1M(3D)。结合典型矿井的上行风流火灾实例,从矿井尺度上,实现对火灾时期风流运动、火灾蔓延时的烟浓度与温度分布,以及通风系统变化的动态模拟。模拟分析得出,矿井上行风流火灾发生时,随着火势的增强,火源主干风路风量增加,导致过流通风,火源旁侧支路出现风量降低-停滞-进而风流逆转的变化;受火灾燃烧动力(火风压)的驱动,过流与逆流的风量变化具有一致对称性;在复杂网络中,旁侧支路会有次序性地发生风流逆转。从矿井宏观尺度上,火灾时期通风系统发生的一系列变化,都是在通风动力与火风压相互作用下产生的;也导致矿井系统总风阻的动态飘移。TF1M(3D)输出的技术参数信息量大,现象直观,动画效果好,为深入分析矿井火灾搭建了性能优良的仿真平台。
The mathematical model of disaster process in mine ventilation system during mine fire period was built based on source-containing ventilation network and previous fire studies,and the software TF1M( 3D) was developed based on MATLAB. Combined with the typical mine ascensional airflow fire example,the airflow movement during fire period,the distribution of fume concentration and temperature,the ventilation system variations were simulated in a whole mine scale. Simulation results show that the air quantity in main airway increases with fire when ascensional airflow fire occurred in mine,while the airflow in the side branch of fire source decreases,stagnate and reverse; driven by fire burning power( fire ventilation pressure),overflowing quantity and reverse air quantity have consistent symmetry; and in complex ventilation network,reverse airflow in side branch orderly occurs. A series of changes of ventilation system during fire period are all produced by the interaction of ventilation power and fire ven-tilation pressure,which also lead to the dynamic drift of mine system total wind drag. This paper provides the relationship between fire severity and wind drag drift value. The software TF1M( 3D) offers a good platform for analyzing mine fire because of its large amount of information,good animation and intuitive phenomenon.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2015年第1期115-121,共7页
Journal of China Coal Society
关键词
上行风流火灾
非稳定运移
系统紊乱
3D可视化
ascensional airflow fire
unsteady migration
system disorder
3D visualization
