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- W765485737 abstract "A series of push and pull laboratory based tests were used to investigate how the surface profile of resin grouted bolts influenced the load transfer mechanism. The bolts comprised deformed bar having deformation profiles at different heights and different spacing between deformations. The results indicated that peak loads and displacements were directly related to the height and spacing of the deformations. A series of numerical simulations were carried out to confirm the results obtained in the laboratory. INTRODUCTON The use of rock bolts has resulted in significant reductions in the number of fatalities in coal and metal mines. Whittaker (2004) stated, “The support of the excavation has evolved primarily from the experience base rather than the knowledge base. Hence there is a need to develop the engineering knowledge base in order to remove confusion and misconceptions in the industry as to roof bolting principles and practices, to optimise and assure the safe, cost effective and appropriate use of fully encapsulated support systems and to develop improved rock support systems”. In modelling a single dimensional resin grouted anchor, Farmer (1975) advanced a theoretical solution for a circular elastically anchored bar surrounded by an elastic grout confined in a rigid borehole. He derived a homogeneous linear differential equation describing the distribution of the force along the anchor. The decay function was exponential in form. Pull tests on concrete, limestone and chalk yielded different answers. Good correlation was obtained in concrete under low axial loads, but in weaker limestone and chalk the results were inconsistent. Farmer also found the shear stress in resin annulus, was a function of the grout as follows:" @default.
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- W765485737 date "2005-01-01" @default.
- W765485737 modified "2023-09-26" @default.
- W765485737 title "Investigation into the Transfer Mechanism of Loads in Grouted Bolts" @default.
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