含水率对煤自然发火期影响的试验研究

Experimental Study of Coal Spontaneous Combustion Period by Water Content

为了获得水分对煤自然发火期的影响规律,以葫芦素煤矿2-1煤为研究对象,采用TG-DSC同步热分析技术,考察了不同含水率煤样的热行为,解算了不同含水率煤样的自然发火期。研究表明:随着含水率的增大,煤自然发火期先增大后减小再增大;存在一个含水率临界值,促进了煤的低温氧化,使煤样有较大的反应速率,煤自然发火期有极小值;葫芦素煤矿2-1煤自然发火期在含水率12.01%处有极小值32d,比原煤样的缩短了11.11%。研究结果对水浸采空区自然发火防治具有指导意义。

In order to obtain influence law- of spontaneous combustion period by water content, it taking 2-1 coal seam of Hulusu coal mine as studying object, and TG-DSC synchronization hot analysis technology, hot activity of coal sample with different water content wee surveyed, spontaneous combustion period of different coal sample with different water content was obtained. The results showed that spontaneous combustion period increased firstly then decreased and then increased with water content increased, there was a criti-cal value for water content, low temperature oxidation of coal was improved, reaction rate of coal sample was improved obviously, spontaneous combustion period had a minimal value, the minimal value of spontaneous combustion period of coal sample of Hulusu coal mine was 32d as water content was 12. 01 % , it shorten 11. 1 1 % to original coal sample, it references for spontaneous combustion pre-vention and currce of goaf with water logging.