易燃厚煤层半孤岛综放工作面瓦斯与火耦合防治技术

The technology of coupled prevention and control of gas and fire for long wall top coal caving half isolated island working face of thick and prone to spontaneous combustion coal seam

针对瓦斯与自然发火防治中存在的顾此失彼、治理措施相互干扰影响大等问题,结合3±219半孤岛工作面的实际情况,确定了预防为主的自然发火治理思路,重点采用了采空区自然发火监测、采空区预防性注浆和喷洒阻化剂、工作面煤体超前惰化、邻侧采空区堵漏风等预防措施,在此基础上,采用了邻近采空区抽放和高位钻孔瓦斯抽放的瓦斯治理技术措施,瓦斯抽放参数、抽放时间根据工作面自然发火情况及时优化调整,有效防止了工作面开采期间瓦斯与自然发火灾害的发生,保障了工作面的安全生产。

Aiming at the issues that the countermeasures of gas and fire prevention and control interfered with each other and had great impact and cared for this and lose that,and combining with the actual situations of No.219 half isolated island working face of 3 up coal seam,the prevention first idea of coal spontaneous combustion prevention and control was determined,the key countermeasures,which were monitoring the goaf gas,prevention slurry injection and retarder spraying in the goaf,advanced inerting of working face coal,air leakage blocking of adjacent goaf,were adopted,on that basis,the gas control countermeasures that were gas drainage from the adjacent goaf and high level boreholes were employed and the parameters and time of gas drainage optimized and adjusted in time according to the goaf situations of coal spontaneous combustion,which effectively prevented the occurrence of gas and fire hazards during the working face mining and ensured the safety production.