High Strength Grouting Material from Recycled Rusp Resin for Mine Support System

Abstract

Anchoring of the rock bolt plays a significant role when deformation or movement of the layers in the rock mass induces axial tensile load in the installed rock bolts. In this situation, low anchorage strength can be the potential cause for the bolt failure in mine, leading to rockfall. Bolts will fail if the induced axial load to the bolt is more than the anchorage strength. Anchorage strength depends on so many factors such as kind of bolt, grouting media, annular space, and shear behaviour at the bolt grout interface, surface profile, installation mechanism and position. The difficulty of the support systemis governed by on the load transmission mechanisms between the rock, the bolt and the resin. Polyethylene terephthalate (PET) is separated from the multilayer packaging film waste and converted into unsaturated polyester resin. The rUSP resin was used for the preparation of high strength grouting material, studied for their efficacy and physico-mechanical parameters such as gel time, reaction temperature and compressive strength and compared to virgin resin. It is found that physico-mechanical parameters of grouting material prepared from rUSP were better than virgin resin-based grouting material. The conclusions of research will improve the effectiveness of maintenance and decrease the expenses connected with the manufacturing of resin capsule.