【摘要】 为解决我国西北地表因缺水少土引发的防灭火困难以及克服注砂防灭火存在的缺点,研制出一种具有松散三维网状结构的防灭火稠化剂.理论分析了该稠化剂的悬砂机理,实验研究了该稠化剂的悬砂效果及流动特性.结果表明,该稠化剂的pH值和屈服应力对其悬砂能力影响很大,悬砂过程是一个逐步凝胶化过程,能大大降低山砂对管道的磨损和流动阻力,便于井下长距离管道输送.该稠化剂在神东补连塔煤矿得到了成功应用,保障了该矿31305和31306综采工作面的安全开采和撤架.更多还原

【Abstract】 In order to solve the difficulty caused by lacking water and mud in mine fire control in the northwest area of China and overcome the shortcomings of pouring sand,a thickener with three-dimensional network structure was developed.The mechanism of the thickener suspending sand was analyzed in theory and the experiments on suspending sand effect and flow characteristic were studied.The results show that the pH value and the yield stress of the thickener influence its suspending sand ability,the suspending sand process is a stepwise gelation,it can reduce the pipeline surface wear and flow resistance and make for long-distance transportation in pipeline.The thickener was applied successfully at Bulianta Mine in Shendong and it ensured the safe exploitation and evacuating brackets at 31305 and 31306 working face.更多还原