Influence of Pre-stress Lose on Anchored Cable Supporting with High Pre-stress

For the problem of pre-stress lose of whole-section consolidated anchored cable supporting in Yuwu Coal,applying FLAC to simulating stress distribution characteristic and supporting effect under different pre-stresses of anchored cable.Pre-stress lose was usually 20%-25%.It was put forward that pre-stress was compensated by super tension 25%.Underground practice showed that pre-stress lose seriously weakened whole-section consolidated anchored cable supporting effect and super tension technology could effectively control deformation of surrounding rock.