Abstract: In order to ensure that a large section of rich water chamber can be used for a long time or hold the late impacts of mining，and for serious water seepage of the chamber floor and bad anchoring performance of cement mortar，the wholly mortar cable construction method with the cement end anchor is proposed.The numerical simulation is made to study the impact of cable anchor plate support to supporting bearing structure.It is obtained that the bottom cable anchor can improve the distribution of plate's bending moment and the stability of floor load-bearing structure.The practice shows that: the bottom cable pass rate reached 97% and the construction method can effectively solve the difficulties in construction of the bottom anchor under similar conditions due to rich water and high construction height.

Key words: Large-section chamber, Cable anchor, Bearing structure, Cement end anchor