下倾(角), 下沉
Channel is the main sediment conduit and deposition area.From updip to downdip area, the sinuosity of channel increases and the flow energy decreases. 深水河道是物源的主要通道和沉积的重要场所，从上游至下游河道弯曲度增加，能量逐渐减弱。
In addition, it is a principle to follow that the formation thickness of upfaulted block is greater than or equal to the downdip block in correlation of subzones as facing faults. 此外，遇到断层时，通常遵循正断层下降盘小层厚度应该等于或者大于上升盘小层厚度的原则。
Keywords first roof weighting pace;periodic roof weighting pace;updip mining;downdip mining; 初次来压步距;周期来压步距;仰斜开采;俯斜开采;
downdip block 下倾断块
