Gas Control Technology for Thick Coal Seam Fully Mechanized Caving Face
In order to ensure the safe mining of 6503 fully mechanized coal caving face and effectively solve the problem of large gas emission,combined with the layout of the mining face roadway and the occurrence of coal seam gas,this paper proposed a gas control technology with the core of strengthening the gas extraction in the goaf and the depressurization gas extraction in the coal seam.The technology mainly uses the method of"horizontal buried pipe+large-diameter drilling+goaf buried pipe"to intercept the gas in the goaf and the coal seam gas in the depressurization zone.After on-site application,the gas extraction rate of 6503 fully mechanized caving face was 15.9-20.2 m3/min,effectively reducing the gas emission rate of the mining face.The gas volume fraction of the return air corner and return air flow of the mining face were within the safe range,and there was no sudden increase or exceeding the limit,proving that the gas control technology used on site can meet the gas control needs of the fully mechanized mining face.
万方数据
维普
