Fault fracture zone reinforcing method based on self-expanding slurry

The invention discloses a fault fracture zone reinforcing method based on self-expanding slurry, which comprises the following steps: determining the position of a fault fracture zone according to geological data and on-site investigation; a plurality of anchor holes are drilled in the direction perpendicular to the fault fracture zone; a plurality of supporting pipes with a plurality of small holes in the partial side walls are correspondingly placed in the anchor holes to support the anchor holes; uniformly mixing expansive soil, ardealite and cement to obtain self-made self-expanding slurry; a grouting guide pipe is correspondingly installed in the supporting pipe, self-expansion slurry is injected into the fault fracture zone through the grouting guide pipe under high pressure, and a plurality of flow guide pipes are arranged on the periphery of the grouting guide pipe and communicated with the small holes of the supporting pipe; and after grouting is completed, the grouting guide pipe is recycled. Gaps i