“双端封堵侧漏技术”在探测大采深工作面煤层底板裂隙中的应用

我国浅部煤层的储量在近几年内大量减少,为满足工业生产,人民生活的需要,开采深部煤层成为势在必行的发展趋势,但是,深部采区条件较为复杂,尤其是在华北石炭-二叠型煤田内,底板奥灰水,溶岩水一直都限制着煤层的开采,底板突水占整个煤矿事故中90%以上的比例。大采深工作面受底板承压水的威胁较大,采动造成的裂隙一旦与导升带相连通,形成一导水通道,则会造成底板突水。双端封堵侧漏技术通过将整个钻孔细分为若干单位段,通过测试每一单位段前后两次漏水的差异,从而确定受回采影响下底板的裂隙发育情况和最大发育深度。

The monitor of fractures in the depth stratum used by Double-block leak technology under the coal seam

A substantial reduction in the storage of the shallow coal seam in our country in recent years,to meet the industrial production and people＇s living needs,staves trend of mining deep coal seam becomes imperative,however,to more complex deep mining conditions,especially in carboniferous-Permian of north China type coal field,Ordovician limestone water,lava always restricts the mining of the coal seam,water inrush more than 90% of the proportion of the total coal mine accidents。the depth stratum facing the threaten by the confined water,once the fractures caused by mining connected with the flowing zone,and lead to a water channel,which will cause the water inrush.The Double-block leak technology divided the drilling into dozens parts,and test each part,then get the development,the maximum depth of fractures.