煤田露头火区燃烧状态的判定
Judgment of Combustion State in Coalfield Outcrop Fire Area
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摘要: 在分析煤田露头火区相关资料基础上，自主设计了MTLT-100型煤田露头火区相似模拟实验装置，并进行了煤田露头火区燃烧过程的相似模拟实验。通过对实验过程中的O2、CO、C2H6、C3H8、C2H4、C2H2的测定分析，得出煤田露头火区的格氏火灾系数R2增至0.5时，煤田露头火区就由低温缓慢氧化预热过程发展到高温加速氧化预热过程；当R2递增至0.8时，煤田露头火区就由高温加速氧化预热过程发展到稳定阴燃过程；当R2处于递减状态时，煤田露头火区就处于阴燃窒息过程了。煤田露头火区处于稳定阴燃过程时火区的温度一般为300 ℃左右，而其余过程中的火区温度均小于300 ℃。Abstract: Based on the analysis of related data in coalfield outcrop fire area, MTLT-100 type coalfield outcrop fire similar simulation experiment device was designed independently, and the similar simulation experiment was carried out. Through the determination analysis of the gases including O2, CO, C2H6, C3H8, C2H4 and C2H2, the followed results show that: when coalfield outcrop fire coefficient R2 increased to 0.5, coalfield outcrop fire is developed from low temperature oxidation preheating process to the high temperature accelerated oxidation preheating process; when R2 increased to 0.8, fire is developed from high temperature accelerated oxidation preheating process to stable smoldering process; when the R2 is in a state of decline, fire is in the process of smoldering suffocation. When fire is in the process of stable smoldering, the fire area temperature is generally about 300 ℃, and it is below 300 ℃ in the rest of process.
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