25th International Mining Congress and Exhibition of Turkey, Antalya, Turkey, 11 - 14 April 2017, pp.105-112
In this study, load bearing capacities and support reactions of Thin Spray-on
Liners (TSLs) with different thicknesses, deformation modules and adhesion to rock surface
values were analysed using ANSYS program, a finite element method software. According to
the results obtained from this study, failure mechanism was found to be prone to changing
from initiation at the contact to rock surface to occurrence at the TSL material as the liner
thickness decreases. Load bearing capacity of the TSLs was found to increase with an
increase in modulus of elasticity and adhesion values. Stress concentration in the liner was
found to increase with an increase in modulus of elasticity of TSL material. Therefore, the
failure in stiff liners is possible to be in the case of TSL material yielding or failing. Adhesion
values were determinative for load bearing capacities of the thick liners. As another effect,
the stiffness value of TSLs was found to be increased in case of having high adhesion.
Totally, failure mechanisms and interactions of rock and the support for 8 different TSL
models were determined in the numerical analyses by modelling a roof with a block which is
able to be loaded and move vertically.