保德煤矿81305综放工作面煤的自燃特性及防治技术研究

为了解和掌握保德煤矿8号煤层自然发火规律，以81305综放工作面为研究对象，进行煤样升温氧化实验，得出8号煤层自燃指标性气体为CO、C2H4。通过现场实测采空区气体变化规律结合数值模拟，得出81305工作面采空区自燃氧化带的范围为:进风侧200~350 m；工作面中部220~400 m；回风侧100~220 m。计算出预防采空区自燃的工作面最安全的推进速度为61.71 m/月。并提出了保德煤矿8号煤层不同开采时期采空区自然发火防治措施。

Study on spontaneous combustion characteristics and prevention technology of 81305 working face in Baode Coal Mine

In order to understand and grasp the spontaneous combustion law of No.8 coal seam in Baode Coal Mine，taking 81305 fully mechanized top coal caving face as the research object，the temperature-rising oxidation experiment of coal samples was carried out，and it was concluded that CO and C2H4 were the index gases of spontaneous combustion in No.8 coal seam.Through on-site measurement and numerical simulation，the range of spontaneous combustion oxidation zone in goaf of 81305 working face were obtained as follows:intake side 200~350 m;central part 220~400 m;return side 100~220 m.The most safe advancing speed of the working face to prevent spontaneous combustion in goaf was calculated to be 61.71 m/month.The prevention and control measures of spontaneous combustion in goaf of No.8 coal seam in Baode Coal Mine in different mining periods were put forward.