| dc.description.abstract | Cement paste backfill (CPB) technology is becoming the standard mine backfilling approach in
the mining industry as an environmentally friendly and cost-effective way to manage tailings. Most
importantly, CPB plays a critical role in ground support to the surrounding rock mass to ensure
the safe and effective operation of the mine. After placement into the mined-out voids, the CPB
structure is subjected to complex loading conditions. Due to the dependency of mechanical
behaviour on the loading rate, CPB may demonstrate distinctive response and fracture failure
characteristics under field loading conditions. However, previous research has primarily
concentrated on traditional geomechanical behaviours, ignoring the impact of loading rate on the
fracture behaviour of CPB, which significantly influences the assessment of mechanical behaviour
and performance of in-stope CPB. Meanwhile, as a cementitious composite, the chemical factors,
including cement content and sulphate concentration, dominate the evolution of the mechanical
properties of CPB. Therefore, it is of theoretical and practical importance to investigate the effects
of cement content and sulphate concentration on CPB's loading rate dependent fracture behaviour.
The research aims to evaluate the loading rate dependent fracture behaviour and properties of CPB
under different loading conditions. [...] | en_US |
