回采工作面上隅角低氧现象成因及防治技术

Cause of Low Oxygen Phenomenon in Upper Corner of Working Face and Its Prevention Technology

我国煤矿回采工作面大多采用U形通风方式,为全面了解U形通风方式下回采工作面上隅角低氧问题的成因及防控技术措施,以便有效降低低氧问题对煤自燃防控工作的干扰,保障矿井的安全开采。通过文献调研,系统地分析了回采工作面上隅角低氧成因及导致低氧现象气体的来源,阐述了现场常用的低氧防控及治理技术,指出了在煤矿低氧防治方面仍存在一些不足,展望了低氧问题的研究方向。研究成果对上隅角低氧现象的防治具有一定实际意义。

U-shaped ventilation methods are mostly used in coal mining faces in my country.To understand the problem of hypoxia in upper corner of the working face under U-shaped ventilation mode can effectively reduce the interference of hypoxia on the prevention.Prevent hidden dangers of coal spontaneous combustion and ensure daily production and personnel safety in mines.By consulting the literature,systematically analyze the cause of hypoxia in upper corner of the working face and the source of the gas that causes hypoxia,expounds the common on-site hypoxia prevention and control and treatment techniques,and points out that there are still low oxygen prevention and control aspects in coal mine.There are still some shortcomings in the prevention and control of hypoxia in coal mines,and the research direction of hypoxia is prospected.The research results have practical significance for the prevention and treatment of hypoxia in upper corner.