Study on energy absorption characteristics of anchor support plate with microlattice dome topology

Abstract

In order to solve the problems such as overload bending, deformation and tearing caused by the rock bolt bracket which is difficult to adapt to the impact of surrounding rock, a new concept of filling the solid part of the dome with tensile microlattice was proposed. By combining the dome structure with tetrahedral lattice, a new bracket-microlattice dome structure bracket was obtained. Through the numerical simulation software Abaqus, three kinds of 3D-printable materials, namely Q235 steel, ABS plastic and aluminum alloy, were set, and different circular section sizes were given on the basis of different materials, namely the diameters of 1 mm, 2 mm and 3 mm, for finite element comparative analysis. The results show that the carrying capacity and energy absorption of the three materials under different profile sizes are in the order of 3 mm Q235 steel > aluminum alloy > ABS plastic. The carrying capacity of Q235 steel is about 4.26×105 N, and the energy absorption is about 2.2×105 J, showing high strength and high energy absorption characteristics. When the material of the new bracket is Q235 steel and the section diameter is 3 mm, the bearing capacity is the highest and the energy absorption effect is the strongest, this is the optimal result of numerical simulation.

Keywords

• bolt support
• dome structure
• numerical simulation
• roadway support
• lattice structure