Consider the stope in the inclined vein shown in the sketch. If the stope height measured along the dip is 115 ft (35.1 m), the true width of the vein is 35 ft (10.7 m), and the bulking porosity, as...

Consider the stope in the inclined vein shown in the sketch. If the stope height measured along the dip is 115 ft (35.1 m), the true width of the vein is 35 ft (10.7 m), and the bulking porosity, as determined from past observations at the mine, is 0.072, what cave height is expected if the caving is in the form of a vertical chimney over the stope and the stope strike length is 105 ft (32.0 m)? If the stope strike length is 205 ft (61.5 m), what cave height is expected?

Note: Stope depth H is 4,650 ft (1,417 m) and the angle of repose of the caved ground is 38◦.