TY - JOUR
TI - Distribution characteristics of the three zones of spontaneous combustion in the goaf of the working face in Xiaojihan Mine
AU - Yu Cong
AU - Tang Zhi-Gang
AU - Cao Tian-Ming
AU - Zhu Wen-Hao
JN - Thermal Science
PY - 2025
VL - 29
IS - 2
SP - 1281
EP - 1286
PT - Article
AB - This study addresses the issue of spontaneous combustion in the goaf of the  11223 working face in Xiaojihan Mine. A 3-D model of the goaf was  constructed using numerical simulation methods, incorporating actual working  face parameters and the porous media fluid dynamics equations. The spatial  distribution patterns of oxygen mass fraction, air-flow velocity, and  turbulent kinetic energy in the goaf were simulated. The oxygen  concentration distribution and air-flow characteristics in the goaf were  analyzed, and the "three zones" of spontaneous combustion were delineated.  The results indicate that the oxidation zone on the intake side ranges from  70-105 m (width of 35 m), the middle part of the goaf ranges from 40-75 m  (width of 35 m), and the return side ranges from 10-25 m (width of 15 m),  consistent with field measurements. The study reveals the non-uniform  characteristics of the oxidation zone in the goaf, providing a theoretical  basis for coal mine fire prevention and control.