A calculation formula of limit to growth length when grout body cracked is deduced from the hoop stress of wholly bonded prestressed cable grout body,which is concurred between the hoop tension stress is created by pretension and the uniformly corrosion expansion force by cable body.

One is double cable crane\|double shoulder pole beam positioning and installation system, the other is replacement of winch\|block pulley fastening anchorage cable system with assembly prestressed fastening anchorage cable system.

Through the estimation by using the suspection theory of the anchor rod,and connecting with the construction practice,this paper expounds the theoretic foundation,support technology and construction requirements of the application of anchor rod and anchor rope combined support in the heavy seciton tunnel.

anchor rope which is common and great efficiency of the supports form is used in geotechnical engineering.

After these, some measures such as mesh shot concrete, concrete facing and anchor ropes are applied to reinforce the landslide.

Application of Anchor in Comprehensive Mining Cut Construction;

Research and application of anchor support simulation test in thick seam gateway of fully mechanized caving face;

Elasticity analysis on distribution of shear stress of pressure-dispersion anchor;

The Bolt-cable Coupling Support Practice on Large Section Open-off Cut for Fullymechanized Sublevel Caving in Thick-hard Coal Seam of Gassy Mine;

Study on cable prestress loss of post-board wall and countermeasures;

A Calculation Method of Length of Anchoring Segment for Cable;