论文部分内容阅读
为了给发现和确定煤炭自燃火源的方法提供理论依据,曾对热作用带内煤体中的热扩散作了分析研究,在初起阶段火源是一个热点,它通过煤层的暴露面与巷道内的大气保持联系。为了检测煤层暴露面的热状态,其所需时间要比内因火灾发展时间短千百倍。所以在发现火源时要标定出一个状态,该状态用煤层的固定温度场
In order to provide a theoretical basis for the discovery and determination of spontaneous combustion sources of coal, thermal diffusivities in coal bodies in the thermal active zone have been analyzed and studied. In the early stage, the source of heat is a hot spot which passes through the exposed surface of the coal seam and the roadway Within the atmosphere to stay in touch. In order to detect the thermal status of the exposed surface of the coal seam, the time required for its development is one thousand times shorter than that of internal fires. Therefore, when the source of fire to be marked when a state, the state of the coal seam with a fixed temperature field