# Axial Load Transfer Mechanism in Fully Grounded Rock Bolting System: A Systematic Review
## 3 Analysis and Results
### Descriptive Results
#### 3.1.5 Articles Leading Research on Axial Load Transfer Mechanism of FGRBSs
They also used elasto-plasto (yielding-hardening) of t the steel to investigate the axial behaviour of the rock bolt. This article has already received 51 citation counts since it was published in the \"Rock Mechanics and Rock Engineering\" in 2021. For this, they conducted their experimental tests by considering both long and short bolts to drive full-range load displacement charts under displacement and load boundary conditions. They proposed that these charts could be used to predict several key parameters for FGRBSs, including: (a) load capacity in pull-out tests; (b) minimum bolt length required to support a loosened rock block, and (c) maximum allowable joint aperture increment. The second most cited article in analytical model published by [PERSON] et al. (2018), in Construction and Building Materials, has been cited 135 times to date. This work proposed a novel analytical model based on the bond-slip relationship, which describes of mechanical interaction at the B-G interface. The model was based on the non-linear slip distribution relationship along the B-G interface, and complete debonding mechanism. Several expressions, including shear stress distribution along the bolt and the axial load acting on the bolt and load-displacement relationship, were derived and presented. Also, they conducted a series of comprehensive pull-out tests of the short EL(s) to propose a new constitutive model for bolt-resin interface. [PERSON] et al. (2018) published the third most cited article on the analytical approach of the axial load mechanism of FGRBSs in 1996, which received 106 citations so far. They proposed a new analytical model for load and displacement along an untensioned fully grouted rock bolting system. They compared load distribution along the bolt for two scenarios: free ends and those with a face plate. This comparison analysed how the distribution varied depending on the fracture location relative to the free face. In their research, the relationship between shear stress and slip was supposed to be linear. They have also suggested a finite difference formulation with a combination of non-linear models of a fully grouted cable bolt for investigating the debonding mechanism based on bolt and grout type. [PERSON] et al. (2018) published the fourth most cited article in analytical approach in the field. They proposed semi-empirical formula for the B-G interface under axial load. Their article has already received 96 citations. The fifth most cited paper, which was cited 63 times, was published by [PERSON] and [PERSON] (2018). Compared to previous analytical models in the field which were constant of the bond-slip relationship, they proposed a new dynamic bond-slip model to characterise bond strength (BS) along the B-G interface. They also suggested some relationships for determining the stress and strain distributions, and load-slip relationship of the bolt in pull-out tests. Along with experimental and analytical articles, two articles on numerical modelling could obtain the highest citation counts in the field. [PERSON] et al. (2018) proposed a new FDM code of numerical simulation for investigating the axial load transfer mechanism of FGRBSs by using Flac2D software. For this, the non-linear bond-slip model of [PERSON] et al. (2018) was implemented. After that, [PERSON] et al. (2018) proposed a new numerical simulation for the debonding mechanism of the B-G interface based on implementing the model of tri-linear bond-slip of bolts suggested by [PERSON] et al. (2018). \begin{table}
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**No.