Cable bolt would provide higher tensile strength, anti-shearing capacity and incomparable bending capacity, and could prevent the lateral movement of strata. It can be divided into plain cable bolt and bulb cable bolt. At the top of the bulb cable bolt, three bulbs to reinforce resin mixing, achieve point anchorage and pretension. The bulbs can be modified in frequency and diameter based on customer’ s request, the diameter is 21mm-38mm. There are plain or bulbs options available, bulbs available at either 0.5m or 1m spacing. There are also available in single strand or twin strand.

A tension mine roof cable bolt having a resin grouted upper portion and a mechanically anchored lower portion. The lower portion includes a shaft which is swaged to the cable and accepts a mechanical anchor. The cable bolt is rotated during installation in a mine roof bore hole to mix resin and simultaneously engage the mechanical anchor with the rock. A drive head press fitted onto the lower end of the cable fails upon tensioning of the bolt to a predetermined load.

Small diameter pre-stressed cable bolt is usually selected to strength the bolt support system with bolt used for in tunnel support widely. In the cable bolt system, with the pulling force increasing continuously, the cable shall be pulled off or pulled out from the anchorage if the pulling force goes beyond it’s strengthening limit. This is the common situation in coal mining tunnel support. It may become serious when heavy impact loads act on cable bolt. In the impact process, violent friction will take place between steel strand and anchorage. This also will produce high temperature or friction sparks which probably result in mash gas burning or fire damp explosion in the coal mining.

We can supply the cable bolt with diameter of 15.2, 17.8, 18.9, 21.6, 21.8mm. The strands can be 7 or 19. If you want to know more about the technical parameter,like mass per meter, cross sectional area, steel grade, tensile strength, min elongation, etc, pls contact us.