Abstract: The room and pillar upward horizontal sublevel filling method with prestressed anchor to support after excavation was used in Yongshaba mine of Kailin Group. Mechanical model by a long cable to know when the more soft rock, the smaller the elastic modulus of rock mass, the maximum bolt shear stress suffered by the smaller, the greater and more uniform the shear stress distribution. On the contrary, the more hard rock, elastic modulus is larger, the maximum shear stress value is large, the more concentrated and smaller the role of shear stress. The work provides a theoretical basis for the support design of mining follow-prestressed.

Key words: Rock strength, Long cable support, Anchorage law