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Abstract In mining metal deposits, blasting fragmentation is a key indicator that directly affects production efficiency and economic costs. To address the limitations of current post-blast assessment, which overlooks the intrinsic relationship between in-situ fragmentation (geological characterization of in-situ rock mass discontinuities) and the resulting blasting fragmentation, this paper proposes a quantitative prediction model and methodology for blasting fragmentation.
1 Introduction Geothermal energy, as a clean, efficient, and renewable energy source, plays an increasingly important role in the global energy transition and the pursuit of carbon neutrality (“dual-carbon” goals). In particular, the development of hot dry rock (HDR) resources through Enhanced Geothermal Systems (EGS) has become a key pathway for the efficient utilization of deep geothermal energy.
Critical medium column theory has typically been used to predict the scope of caved rock zone (CRZ) caused by caving mining method. It is essential to understand the distribution laws of lateral pressure induced by caving mining method with different dipping angles. In this study, a self-designed scaled physical model was used to investigate the distribution laws with angles ranging from 80° to 90°, and ore drawing was employed in experiments to simulate caving mining method.
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