Therefore, in the process of load transfer within the unconsolidated confined aquifer, the key strata of overburden rock are prone to have a compound breakage when the load on the upper interface of bedrock is great and the bedrock is very thin.

• 在松散承压含水层的载荷传递作用下，作用在基岩顶界面的载荷较大，当基岩厚度较薄时，采场覆岩关键层易产生复合破断。