2013•Safety in Coal MinesRequires access

Study on Distribution Laws of Spontaneous Combustion Hazard Zone at Fully Mechanized Caving Face in Extra-thick Coal Seam

LI Chong-ma

Abstract

The main gas in 90101 fully mechanized caving face of Yangjian Coal Mine has been observed.In the same time,the study analyzed the oxygen distribution in goaf by using the Excel initially and the collected data.Then the oxygen concentration distribution laws in whole goaf are analyzed with CFD.At last,the spontaneous three zones has been divided.The influence of air distribution volume on the distribution laws of spontaneous three zones is studied with CFD technology.The result shows that the width of spontaneous combustion zone will increase with the increase of the working face air volume,and the influence is more obvious in the wind return side than the wind inlet side.

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Key concepts: Spontaneous combustion, Mining engineering, Volume (thermodynamics), Distribution law, Law, Coal mining, Coal, Engineering