  The dynamics of a fibre-bundle type model with equal load sharing rule is
numerically studied. The system, formed by N elements, is driven by a slow
increase of the load upon it which is removed in a novel way through internal
transfers to the elements broken during avalanches. When an avalanche ends,
failed elements are regenerated with strengths taken from a probability
distribution. For a large enough N and certain restrictions on the distribution
of individual strengths, the system reaches a self-organized critical state
where the spectrum of avalanche sizes is a power law with an exponent
$\tau\simeq 1.5$.
