补连塔矿12511综采工作面矿压显现规律

Mine Strata Pressure Behavior Law of 12511 Fully-mechanized Coal Mining Face in Bulianta Coal Mine

为研究近浅埋煤层特大采高工作面矿压显现规律,以补连塔12511综采工作面为研究对象,通过工作面矿压实测数据,分析了近浅埋煤层7.4 m特大采高工作面矿压显现规律。结果表明,工作面初次来压步距44 m,回采初期周期来压步距11.74 m,回采中期周期来压步距增大至14.1 m,工作面周期来压对支架作用强度整体显示出强、弱交替变化规律,周期来压强度呈现'两端小,中间大'的特征。工作面周期来压动载系数为1.39。支架工作阻力呈正态分布,呈现较好工作状态。

To study the behavior law of ground pressure in the extremely high mining face of near shallow buried seam,the12511 fully mechanized mining face of Bulianta Mine was taken as the research object,through the measured data of the rock pressure of the working face,the law of strata behavior in 7.4 m super large mining height working face is analyzed.The results show that the distance of first weighting is 44 m,cyclic pressure distance during initial stage of mining is 11.74 m,and the interval of mid-mining cycle increases to 14.1 m,and the working face periodic weighting has a strong and weak alternation law on the support strength.Periodic compressive strength presents the characteristics of'small ends,large middle'.The dynamic load coefficient of periodic weighting of working face is 1.39.The working resistance of the support is normal distribution,showing a good working state.