矿井竖三带观测及其分布规律研究

为了研究煤矿顶板岩层竖三带,掌握裂隙带变化规律,文章针对常村矿地质条件,采用井下仰孔分段注水观测方法,进行工程实验,分析了导水裂隙带高度,进一步计算出煤层采动覆岩冒落带发育高度,确定了常村矿3#煤层顶板覆岩采后形成的裂隙带高度范围及覆岩采动冒落带高度,得出了相应的冒采比,为煤矿安全生产提供了技术指导。

In order to study the vertical three zones of roof rock in coal mine and master the variation law of fracture zone,this paper,according to the geological conditions of Changcun Mine,adopts the method of sublevel water injection observation of downhole,carries out engineering experiments,and analyzes the height of water-conducting fissure zone.The development height of overlying rock caving zone in coal seam mining is further calculated,and the height range of fracture zone formed after mining roof rock of coal seam in Changcun Coal Mine and the height of overlying rock caving zone after mining are determined,and the corresponding caving ratio is obtained,which provides technical guidance for coal mine safety production.