this paper stresses to discuss the problems concerning earth pressure, anchor rod arrangement, calculating formula of the shearing strength of anchor rod and the stability of the anchored body in the earth anchor rod for deep founda-tion pit support.

Under the circumstance that traditional supporting could not ensure safety of surrounding rock,reinforcement technology by non-uniform pipe-style grunting and preset bolting rope were adopted.

The article elaborated effect of increasing the anchor bar pretightening force to reinforce adjoining rock during the course of heavy fully-excavating laneway anchor bar suppoting.