Among them, the depth to which the

Among them, the depth to which the rigid cage rail is clamped into the cage rail is mm, and the angle shrinkage dimensions of x and y cages; A, b cage length and width; L distance between center lines of tank track beams; M the distance between the longest beam and the center line of the tank track beam between ladders; T generally take 300-400mm, f1 cage and the safety gap between the wall according to the mining engineering design manual book table 4-1-2, generally take 200mm .. Since the diameter of wellbore is determined by 0.5m step-in, the above results meet the requirements of design accuracy and need not be counted repeatedly.