Roof and wall support is vital in mining and tunneling operations. Mine and tunnel walls and roofs consist of rock strata, which must be reinforced to prevent the possibility of collapse. Rock bolts are widely used for consolidating the rock strata.
In conventional strata support systems, a hole is drilled into the rock by a drill rod, which is then removed and a rock bolt is then installed in the drilled hole and secured in place typically using a resin or cement based grout.
To improve this process, self drilling rock bolts have been proposed whereby the bolt is also used as the drill rod. As such, with a self drilling rock bolt, the hole can be drilled and the bolt installed in a single pass. Whilst self drilling rock bolts provide the opportunity to substantially improve installation times of rock bolts. The construction technology is simple, easy, and reliable and can avoid the hole collapse effectively.
Self drilling rock bolt is an advanced anchor system and has been widely used in mining and tunneling projects. It integrates the functions of drilling, grouting and anchoring. And it can ensure anchoring for complex ground conditions, such as soft rock, soil layer, and fault zone, etc.