When a high-water-cut physical inhibitor (HWPI) is sprayed on the coal in goaf, moisture in coal will undergo a substantial reduction under the influence of liquid flow and water evaporation, which severely weakens the inhibitory effect of the HWPI and greatly shortens its inhibitory lifetime. Therefore, this paper proposes a thermoresponsive secundine inhibitor (TSI) to solve the problem of poor water retention and short inhibitory lifetime by sealing the HWPI in thermoresponsive secundine. Before the ambient temperature (30 °C) reaches the trigger temperature, the water retention rate of the TSI is 100%. After the trigger temperature is reached, the TSI will quickly release a large amount of the HWPI to suppress coal spontaneous combustion. The releasing time and trigger temperature of the TSI drop rapidly with the increase of the borehole diameter and borehole number, while its weight loss grows with the increase of the borehole diameter and borehole number. The experimental results reveal that the borehole diameter of 2.5 mm and the borehole number of 12 are the optimal conditions for the TSI to release more HWPI in a relatively short period of time.

中文翻译：

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热敏性Secundine抑制剂对煤自燃影响的实验研究

当在采空区中的煤上喷洒高含水量的物理抑制剂（HWPI）时，煤中的水分会在液流和水蒸发的影响下大量减少，这会严重削弱HWPI的抑制作用并大大缩短它的抑制寿命。因此，本文提出了一种热敏性仲胺抑制剂（TSI），通过将HWPI密封在热敏性仲胺中来解决保水性差和抑制寿命短的问题。在环境温度（30°C）达到触发温度之前，TSI的保水率是100％。达到触发温度后，TSI将迅速释放大量的HWPI以抑制煤的自燃。TSI的释放时间和触发温度随井眼直径和井眼数目的增加而迅速下降，而其重量损失随井眼直径和井眼数目的增加而增加。实验结果表明，井眼直径为2.5 mm，井眼数量为12是TSI在相对较短的时间内释放更多HWPI的最佳条件。