长距离定向钻进防治老窑积水实践

Practice of long distance directional drilling for prevention and control of water accumulation in old mine

羊场湾煤矿Ⅱ020613工作面为6煤层第一个工作面,上临磁窑堡扩建井采空区。为消除采空区积水隐患,提出了在缓坡斜井合适位置引进长距离定向钻探技术。在明确工作面充水水源的前提下,利用定向钻进技术轨迹可控、定位精确的优点,通过2个定向钻孔对采空区积水进行探查疏放。疏放总量达21.15万m^3,有效达到了“疏水降压”的目的,且钻孔位于磁窑堡扩建井采空区冒落带,可作为水文动态监测钻孔长期使用,该方法也为类似矿井防治周边老窑积水提供了一定借鉴。

TheⅡ020613 working face of Yangchangwang coal mine is the first mining face for mining No.6 coal seam,adjacent to the goaf of Ciyaobao mine.In order to eliminate the hidden danger of water accumulation in goaf,long-distance directional drilling technology is introduced in the appropriate position of gentle slope inclined shaft.On the premise of defining the water filling source of the working face,based on the characteristics of controllable trajectory and accurate positioning of directional drilling technology,two directional boreholes are used to detect and release the accumulated water in goaf.The total amount of drainage is 211500 m^3,which effectively achieves the purpose of“drainage and depressurization”.Moreover,the borehole is located in the caving zone of goaf of Ciyaopu mine,which can be used as the hydrological dynamic monitoring borehole for a long time.This method also provides a certain reference for similar mines to prevent and control the surrounding old mine water.