针对煤矿井下定向长钻孔轨迹预测中存在的问题,提出了应用D-S证据理论将瓦斯抽采钻孔施工的地质条件、钻具组合条件和钻进工艺参数3部分信息进行融合,并结合现场实例对钻孔轨迹进行预测。融合结果表明:该方法为煤矿井下定向钻孔施工提供了参考,弥补了单纯使用测斜仪器的不足,从而提高钻孔施工中钻孔轨迹的预测精度和预测效率。 In view of the problems existing in the prediction of coal mine directional long borehole trajectory, this paper proposes the application of DS evidence theory to integrate the geological conditions, the drilling assembly conditions and the drilling process parameters in the three sections, Predict borehole trajectory. The results of the fusion show that this method provides a reference for directional drilling in coal mine, which makes up for the shortcomings of simply using the inclinometer, so as to improve prediction accuracy and prediction efficiency of drilling trajectory in drilling.