Study on Distribution Laws of Spontaneous Combustion “Three Belts” in Goaf with Buried Pipe Extraction

Abstract

To study the distribution law of spontaneous combustion "three zones" under the condition of gas extraction by buried pipe in goaf during coal mining, taking the goaf of 81307 fully mechanized caving face in Baode Coal Mine as the research background, the “three zones” of spontaneous combustion were studied by numerical simulation and field measurement. The research results show that on the inlet side of 81307 fully mechanized caving face, from 0 to 175 m is the heat dissipation zone, from 175 to 330 m is the oxidation zone, and more than 330 m is the asphyxiation zone; on the side of the rubber conveyor, from 0 to 110 m is the heat dissipation belt, from 110 to 265 m is the oxidation zone, and more than 265 m is the asphyxiation zone.

Keywords

• goaf
• buried tube extraction
• “three zones” of spontaneous combustion
• partial y type
• multi-field coupling
• numerical simulation