综采动压沿空巷道合理掘巷时间研究

Study on Reasonable Driving Time of Gob-side Entry Driving in Dynamic Roadway

以付村煤矿3上1008工作面沿空巷道为研究背景,采用数值模拟和现场实测相结合的方法对追尾掘进沿空巷道合理掘巷滞后时间进行研究。数值模拟结果表明,掘进迎头滞后时间大于46 d时,沿空巷道围岩维护状况良好;现场实测表明,当掘进巷道滞后时间大于40 d时,巷道基本不受基本顶剧烈运动影响。为避免受工作面基本顶剧烈运动影响,尽可能缓解采掘接续异常紧张状况,1008沿空掘巷滞后1007工作面的时间应大于40 d。

By taking the gob side entry roadway of the No.3 upper coal seam 1008 working surface in Fucun coal mine as the background,the research project is to study the reasonable lag time of gob side entry retaining Rear-end excavation.The simulation result shows that the condition of surrounding rock maintenance of gob side roadway is good when the excavation lag time more than 46 days;the field measurement shows that the roadway is not affected by the severe motion of the working face when the lag time is greater than 40 days.In order to alleviate the abnormal tension of the shaft continuing, and avoid the significant influence of the main roof movement, the lag time of 1008 gob side entry roadway should be more than 40 days.