煤层瓦斯压力是煤矿管理者开展瓦斯预测和防治工作的基本依据。文章针对下行穿层钻孔很难准确测定煤层瓦斯压力的问题,提出使用“分时分段封孔法”进行封孔。此法有效封堵了围岩裂隙水,为复杂条件下准确测定瓦斯压力提供了保障。经现场实践证明,取得了较好的效果。 Coal seam gas pressure is the basic basis for coal mine managers to carry out gas prediction and prevention work. In this paper, it is difficult to accurately determine the gas pressure of coal seam through the borehole through the borehole. It is proposed to seal the borehole with the “sub-section sealing method”. This method effectively block the surrounding rock fissure water, provided a guarantee for the accurate determination of gas pressure in complex conditions. The field proved that achieved good results.