Block caving remains a preferred underground mining method for large, low-grade orebodies due to its ability to achieve high production rates and low unit costs at scale. However, its application is increasingly challenged if operations extend to greater depths and into more complex geotechnical conditions. A combination of factors such as elevated in situ stresses, weak and variable rock masses, cave production and propagation, increased seismic response, and brittle high-strength rock creates challenging and complex environments. In these settings, cave-related risks and outcomes – such as uneven cave growth, seismicity, mudrush, convergence damage, and dilution control challenges – can directly impact reserve recovery. Managing this complexity requires realistic expectations around capital intensity, operating costs, and mine sequencing and development timelines, along with flexibility in the planning and execution of cave construction and production. 
 
Fundamental caving principles remain critical and should not be overlooked in the pursuit of innovation. In particular, cave management involving cave construction, production planning for initiation, and propagation to breakthrough are strongly time-dependent processes, where sequencing and timing are as important as the activities themselves. Site priorities to meet ramp-up targets, including development rates, drawbell construction, and early production tonnage, can come across as positive indicators of progress but may indirectly lead to increased cave related risks and impacts to reserve recoveries. 

Established design and management approaches remain effective at typical depths and in relatively forgiving conditions, but their direct application at greater depth and under more challenging conditions requires deliberate adaptation. This paper generally outlines the key challenges encountered in deep and geotechnically complex block caving environments and discusses the time dependency implications for design adaptation, mine sequencing, and management strategies. It emphasises the importance of effective cave management through sequencing and draw control, and then presents a set of conceptual design adaptations that are not commonly applied in block caving but may be challenging to implement while following established caving principles. Successful application of block caving in geotechnically complex environments will depend on disciplined, time-dependent sequencing that remains aligned with fundamental caving principles.