METHOD OF AND ARRANGEMENT FOR SETTING ANCHORS IN LOOSE ROCK RANGING FROM COHESION-POOR TO NON-COHESION ROCK

摘要

During setting of anchors in loose rocks ranging from cohesion-poor to non-cohesion rocks, an anchor including a drilling rod and a drilling crown is used, in which the drilling rod is provided with a central axial opening and with radial opening in the region close to the drilling crown so supply a mortar suspension or the like through the central axial opening during the drilling process. 212-687-5068