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Extinguishing technology with three phase foam grouting from surface boreholes for mine special large fire disaster

ZHOU Fu-bao 1 , SONG Ti-liang 1 , WANG De-ming 1 , ZHANG Yu-liang 2 , LI Xiang 2 (1. China University of Mining and Technology, Xuzhou 221008, China; 2.Ningxia Coal Mining Group Corporation Ltd., Yinchuan 750001,China)  
The paper introduced the new technology for the three phase foam grouted with the boreholes at the surface and the successful application in large fire disaster in Baijigou Mine of Ningxia Coal Mining Group. The site application practices showed that the three phase foam grouted with borehole at the surface had the advantages of large flow, simple technology, stability and others. The foam grouting is very suitable to handle a large area, high caving space and the large fire area, which the location hard to be settled.
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