Abstract: Aiming at the problem that it is easy to occur rib spalling and roof caving when the large-height mining face in the fourth east plate of Sihe Coal Mine crosses the fault, superfine cement grouting material is selected, the automatic control system of grouting pressure stepless adjusting grouting quantity is established, and the single-hole grouting technology of shallow grouting, secondary hole forming and multiple injection is designed, which improves the grouting construction efficiency, reduces the grouting cost, reduces the measurement times of coal wall spalling after grouting, and reduces the height and depth of coal wall spalling, so as to ensure the effective advance of the working face.