【摘要】 以水帘洞煤矿3801特厚硬煤层综放工作面开采为工程背景,对采空区侧矿压显现进行了两次在线实时观测,结果如下:①得到了采空区巷道覆岩移动、支护体受力、侧向支承压力显现特征,揭示了工作面上端头采空区侧周期来压等于走向周期来压步距,建立了采空区侧向上位直接顶"岩-矸"结构(位于煤层上方16～24 m)、基本顶"岩-梁"结构的覆岩结构模型;②建立采空区巷道隔离墙受力模型,结合实验得到的矸石充填体"应力-应变"关系,计算得出采空区巷道隔离墙承载性能适应覆岩运动;③根据工作面上端头采空区侧周期来压超前于支护受力、侧向支承压力显现的时序关系,确定了覆岩运动对压力显现的主导作用。应用研究结果,优化3802运输巷与3801综放工作面煤柱宽度为8 m,较以往煤柱宽度减少22 m,已施工完毕的3802运输巷达到了预期效果,技术经济效益显著。更多还原

【Abstract】 By using the online intrinsic-safe mining pressure monitoring system,two observations regarding the lateral pressure were made to one solid coal side of goaf at the working face 3801(where the fully-mechanized top-caving method FMTC was used) at Shuiliandong Mine,with the results are as follows:① The characteristics of movement of the overlying rock,force borne by the supports,and the lateral supporting pressure in the tunnel were obtained,the fact that pace of the periodical lateral pressure equals to that of the periodical strike pressure was revealed,and a model for the lateral overlying rock structure was established based on the stabilized roofing,the upper roof’s structure(16-24 m above the coal seams) and the rock-beam structure for the main roof in the tunnel of goaf.② The conclusion was drawn that the property of the separating wall of the tunnel can suit the movement of the overlying rock resulted from the calculation by establishing the model of force-bearing of the separating wall of the tunnels in goaf in combination with the stress-strain relation.③ The dominance of the overlying rock movement on pressure was determined on the basis of the features of the force bearing of the advanced support due to the lateral periodical pressure and the lateral supporting pressure,which will be used to study the theory by which the rock formation’s movement controls the mine’s pressure.The result was applied to optimize the width of the coal pillar between 3802 transport level and 3801 working face to 8 m,reduced by 22 m compared with the previous one so that the former meets the expectation after construction.更多还原