矿用输送带火灾在发生过程中，主要产生CO和烟雾等指标气体。然而，以CO作为指标气体易受到干扰，而烟雾产生时表明输送带已经达到较高温度，此时往往容易错失最佳灭火及人员逃生时机。为此，创新性地提出温敏改性输送带的方法：通过在输送带覆盖层中添加温敏材料以进行物理改性，再借助程序升温氧化炉、综合热重分析仪、输送带滚筒摩擦试验机等设备对输送带改性前后产生指标气体的初始温度、分解产气速率及体积分数变化进行测试。试验结果表明：采用温敏材料物理改性的方法对输送带原有的结构强度影响较小，也不会增加火灾发生和蔓延的危险性；改性前，输送带最早产生的指标气体CO的温度为110 ℃左右，但是其产生体积分数和释放速率较低且易受到矿井内不同来源CO的影响，从而造成误判；而改性后的输送带最早在70～80 ℃时即可探测到覆盖层内的温敏材料分解产生矿井中不存在的指标气体，与改性前相比，不仅初始指标气体产生的温度提前了30 ℃左右，而且指标气体释放时速率快、体积分数高，从而更容易被监测。此外，从实际工程应用角度进一步证明了物理改性方法的可行性，证实了温敏材料分解产生的指标气体不受矿井内其他材料氧化所产生气体的干扰，因此保障了输送带火灾早期监测预警的及时性和精准性。

In the process of coal mine transport belt fire, CO and smoke are mainly produced, and CO as the indicator gas is susceptible to interference. When smoke is produced, it indicates that the conveyor belt has reached a high temperature, which risks missing the optimal time for extinguishing fires and ensuring personnel safety. To address this issue, an innovative method is proposed to modify the cover layer of conveyor belt using the thermo-sensitive material. This physical modification involves implanting the thermo-sensitive material to the belt. To evaluate the effectiveness of this modification, tests are conducted using a temperature-programmed oxidation furnace, a comprehensive thermogravimetric analyzer and the conveyor belt roller friction testing device to measure the changes in initial temperature, gas production rate, and volume fraction of indicator gases before and after the modification. Experimental results demonstrate that the physical modification with the thermo-sensitive material has minimal impact on the structural strength of the conveyor belt, and does not increase the risk of fire occurrence or spread. The unmodified transport belt produces CO as an early indicator gas at around 110 ℃, but its volume fraction and release rate are low, making it susceptible to misjudgment due to the presence of CO from other sources in the mine. The modified transport belt, on the other hand, detects the decomposition of the thermo-sensitive material in the belt's cover layer, generating the indicator gas that do not naturally occur in the mine at temperatures of 70～80 ℃. Compared to the unmodified belt, the modified belt enables earlier detection of the initial indicator gas by about 30 ℃, with a higher release rate and volume fraction, making monitoring easier. Moreover, the feasibility of the physical modification method is further substantiated from the perspective of practical engineering application. The indicator gas produced by the decomposition of the thermo-sensitive material is not affected by gases generated through oxidation of other materials in the mine, ensuring timely and accurate monitoring and warning of potential fires in the conveyor belt.