煤矿巷道高位火灾治理过程中注浆对温度场变化的影响

Effect of grouting on temperature field during high-level fire control in roadway of coal mine

采用同位素测氡法和钻探法相结合的方式对宏祥煤业矿井火源进行了探测,采用地面打钻注浆的方法对煤层自燃火区进行灭火,运用合理简化三维温度场的方法分析了注浆与高温火区温度场变化的关系,结果表明,在火区周边帷幕孔注浆过程中,由于孔温较低,随着注浆量的增加,温度呈线性连续下降;在中心火区高温孔注浆过程中,当注浆量达到一定值(浆液接触到高温煤体)时,温度会出现不同程度的反弹,随后又会继续下降,直至正常。

The fire source was detected on the ground by Radon detection technique combined with exploration boring in Hongxiang Coal Mine and the fire area caused by coal spontaneous combustion was extinguished by drilling and grouting.The relationship between grouting and temperature field was analyzed by simplified 3D temperature field analysis method.The results showed that the temperature continued to fall linearly with the increase of grouting amount due to low temperature in the hole,when grouting from the curtain holes around the fire area;while the temperature rose and fell variably and then continued to fall to normal temperature when the slurry was enough to flow to the high-temperature seam from the grouting holes above the center of fire area.