Development and Application of New High-moisture Thickener for Prevention of Coal Spontaneous Combustion
LI Fanglei
JIA Yuwei
LU Yi
Abstract：In order to effectively prevent and control the spontaneous combustion of coal, directive study was made on high-moisture thickener containing suspended solid-phase medium based on the analysis of the properties of the existing thickener now used for mine fire control. Experimental study on the properties of the suspended solid-phase medium of A, B and C suspending agents was carried out, it was found from the experimental study that when A, B and C suspending agents were used alone, the properties of the suspended solid-phase medium of suspending agent B was the best, suspending agent B came second and suspending agent C was slightly poor, and after they were compounded, their properties were much better than that of single one. Experimental study was also made on the influence of cross linking agent upon the property of the suspended solid-phase medium of suspending agents and theoretical analysis was conducted on its influencing mechanism. A new high-moisture thickener containing suspended solid-phase medium was compounded in the laboratory and their mixing ratio was that the mass concentration of suspending agent A, B and C was respectively 0. 29%, 0. 14% and 0. 36%, the mass concentration of cross linking agent was 0. 05%. After this new high-moisture thickener was used for the prevention and control of spontaneous combustion of coal in the gob of 42101 working face in Buertai Mine, the CO concentration in the gob and at the corner angle was respectively reduced from 5 000ppm and 300ppm to 200ppm and 35ppm or so, better effect was achieved.
Keywords：spontaneous combustion of coalsolid-phase mediumhigh-moisture thickenerfire prevention and extinction
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 9-12 )