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实践中发现,一些矿区的煤比另一些矿区的煤易发生自热。这时常归因于煤的自热倾向性。在实验室可用差示热分析法(DTA)鉴定出煤的自热倾向性。但仅据这类实验还不足以解释自热的发生情况。本文对自热倾向为低、中、高三种等级的煤进行了研究(根据DTA温度自记曲线)。其中只有自热倾向中等的煤取自发生过自燃的煤层。研究表明,自热倾向严重的煤层并不一定发生自燃,而开采条件可以增大或消除煤的潜在自热危险,因此,需要对这些影响进行定量分析。
In practice, it has been found that some coal mines self-heat than coal mines in other mines. This is often attributed to the self-heating tendency of coal. Differential thermal analysis (DTA) can be used to identify the self-heating tendency of coal in the laboratory. However, according to such experiments alone is not enough to explain the occurrence of self-heating. In this paper, the self-heating tendency is low, medium and high grade coal was studied (according to DTA temperature self-record curve). Only moderately self-heating coal is taken from spontaneous coal seams. Research shows that spontaneous combustion does not necessarily occur in coal seams with serious self-heating tendency, and the mining conditions can increase or eliminate the potential self-heating risk of coal. Therefore, these effects need to be quantitatively analyzed.