(1) Short capital construction time: Because the adit construction is simple and convenient, the construction conditions are good, and the excavation speed is much faster than that of the shaft or inclined shaft.

(2) Less capital investment: the excavation cost per unit length of adit is much lower than that of shaft, and the maintenance cost is also less. There is no bottom code, the entrance facilities are simple, and the derrick upgrade machine room is arranged to save investment costs.

(3) Low drainage cost: general gravity drainage.

(4) Low cost of rapid transportation: generally, the adit uses electric locomotives, and the underground sliding ore is much lower than the shaft lifting transportation cost.

(5) Easy ventilation: You can often ventilate naturally, and add a fan when it is difficult.

(6) Safe and reliable production: the adit has high transportation capacity and good safety for transporting people and goods.