The self-drilling bolt is a hollow rod with coarse thread which is a design similar to the drill rod. The bar, being hollow inside, allows passage of water / flushing air during drilling; as well as, injecting grout or resin. This bar carries at its end a bit or cutting tool with several holes sweeping, which is lost in the perforation process. The bar to the being threaded along its length allows the coupling successive bars using connectors or couplets. The self—piercing bolt consists of a hollow rod with thick thread whose design is similar to that of a drilling rod. The rod, which is hollow, allows water/purge air to circulate during drilling; it also allows cement grout or resin injections. This rod has a bit or cutting tool with various mapping drills, which is lost in the drilling process. The rod, which is twined across its length, allows rods to be successively coupled through the use of connectors or couplets. The design of the self-drilling bolt considered a cold rolling to form a standard thread profile (R25, R32, R38 and R51 and T76). As accessory, a plate and nut are used. In mining, tunneling and specializing civil engineering are used as reinforcement bolts.
The Sinorock rock bolt system delivers excellent performance for an increasing range of applications. The following pages show a portfolio
of projects we have completed over the last few years and have been divided into specific areas.Sinorock supplies a wide range of capital equipment and rock bolt for the global ground engineering markets. Sinorock will continue its
rock bolting business within underground mining through manufacturing and distribution of rock bolts. Sinorock will also continue to sell
self drilling bolt in selected markets and applications.