<p>Recycling cement-amended tailings, a typical time-dependent material due to multiphysics evolution, back into subsurface cavities has gained increasing popularity for the reduced aquifer contamination and enhanced mine profitability brought by the waste management technology. Despite the competitive socioeconomic benefits delivered via sustainable development, the recurring thermal pressure anomalies observed during stoppage of deposition have still raised growing concerns over the current practice of backfilling. In this paper, we propose a novel strategy for modeling the delayed thermal pressure generation caused by exothermic hydration, and the multiphysics nature of the anomalous pressure build-up has been replicated computationally for the first time. By further scrutinizing the influence of temperature configuration and mix design, we have hence identified practically the favourable settings for mobilizing abnormal pressure development. Our investigation suggests that the growing temperature of deep underground mines would pose unprecedented geotechnical challenges to the traditional concept of waste tailings recycling. Meanwhile, albeit exercised ubiquitously as a rule-of-thumb for enhancing mechanical backfill performance, increasing cement usage might still relax the temperature threshold for significant pressure generation due to release of greater chemical energy. Nevertheless, compared to chilly and warm backfill susceptible to exogenically-induced and spontaneous anomalies, respectively, operating at moderately higher temperatures could rather enable the best resistance to the potential thermal pressure build-up. This study not only provides new insight into the unexpected thermal pressure anomalies observed in field backfilling operations, but also has important implications for understanding the complex time-dependence in multiphysics evolution of cementitious materials under non-isothermal conditions.</p>