The paper introduces the engineering design and technical scheme of pressure grouting before the construction of the second auxiliary shaft and the east ventilation shaft of Zhangji coal mine. Y-shape branch holes were constructed with directional drilling by MWD to improve the construction efficiency of grouting hole and avoid interference from the site. Repeated grouting and grouting with pressure control were used to solve the mud channeling in fractured formation and protect the roadways nearby. The related issues in the engineering design and the construction are systematically summarized and discussed.