针对羊场湾煤矿130207工作面深埋高应力厚砂岩顶板赋存条件下回采过程中面临的强矿压显现问题,采用理论分析手段研究了130207工作面支架增阻特征、整体矿压显现规律、大小周期来压步距,工作面开采时呈现“来压急增阻、非来压缓增阻、大小周期来压、持续性大周期来压”的特点,大周期来压步距平均56.9m,小周期来压步距平均13.7~15.7m;采用微震监测手段得到能量事件分布规律,发现102及以下能级事件频次占比达到93.06%,无论是高能级事件还是所有能级事件,均主要集中在煤层上方40.23m厚的粗砂岩层内;分析了采场应力与覆岩破断时空关联性,得出采场覆岩破断全周期能量动态演化规律,建立了顶板结构模型,分析了工作面周期来压顶板结构演化过程。

Aiming at the problem of strong mine pressure behavior in the mining under deep buried high-stress thick sandstone roof of the 130207 working face in Yangchangwan Coal Mine, the resistance increase characteristics of the working face support, the overall mine pressure behavior law, the periodical weighting interval were analyzed. The results showed that, the mine pressure can be characterized as sudden pressure increase, non-pressure slow resistance, large and small cycle pressure, and continuous large cycle pressure during face mining, and the average weighting interval of the large period was 56. 9 m, and that of the small period was 13. 7~15. 7 m; The distribution law of energy events was obtained by microseismic monitoring, and it was found that the frequency of events at energy levels 102 and below accounted for 93. 06%, whether it was high-level events or all energy level events, mainly occurred in the coarse sandstone layer 40. 23 m thick above the coal seam. The roof structure model was established, and the evolution process of the working face cycle to press the roof structure was analyzed.