智能化综采工作面瓦斯抽采方法及效果

Method and Effect of Gas Drainage in Intelligent Fully Mechanized Mining Face

分析了山西某矿智能化开采瓦斯抽采方法及效果。采用分源预测法,预测最大绝对瓦斯涌出量12.9m^(3)/min,最大相对涌出量为10.97 m^(3)/t。瓦斯涌出量本煤层斯涌出为主约为61.44%,邻近层瓦斯涌出量约占38.56%。工作面掘进前,在运巷钻场采用长距离顺层钻孔方法进行区域预抽。工作面掘进期间,在材巷和运巷同步施工钻场,随掘随抽。工作面回采期间,工作面材、运巷本煤层钻孔、4号上预抽钻孔、裂隙带钻孔以及上隅角插管抽采相结合的抽采方法进行治理瓦斯。后期效果考察中,瓦斯抽采纯量为6.31 m^(3)/min,工作面瓦斯预抽率为43.1%,说明抽采方案具体可行,能够满足工作面掘进及回采期间的抽采达标要求。

This paper analyzes the gas drainage method and effect of intelligent mining in a mine in Shanxi Province. According to the method of prediction, the maximum absolute gas emission is predicted to be 12.9 m^(3)/min and the maximum relative gas emission is predicted to be10.97 m^(3)/t. The gas emission is mainly from this coal seam, accounting for 61.44%, and the gas emission from adjacent layers accounts for38.56%. Before the driving of the working face, the long-distance bedding drilling method shall be adopted for regional pre pumping in the tunnel transport drilling yard. During the excavation of the working face, the drilling site shall be constructed simultaneously in the material roadway and the transport roadway, and the drilling shall be carried out while excavating. During the mining of the working face, the gas is controlled by the combination of the mining methods of the working face material, the coal seam drilling of the haulage roadway, the No. 4 upper pre pumping drilling, the fracture zone drilling and the upper corner intubation pumping. In the later effect investigation, the net amount of gas drainage is 6.31 m^(3)/min, the gas pre extraction rate of the working face is 43.1%, which indicates that the extraction scheme is specific and feasible, and can meet the extraction standard requirements during the excavation and mining of the working face.