(1) The development systems are the adit and pass above 4100 m level, and underground shaft under 4100 m.

(2) Adit Ginde of the University of Colorado Denver , one of the researchers, said in a statement.

(3) The measured adit water temperature verifies the predicted results and the system behavior proves desirable.

(4) The vacuum degree at tailrace adit varies most significantly at the lowest downstream water level and improves gradually along with the rising of downstream water level.

(5) Most of this local iron ore was mined from shallow pits and from adits dug into the valley sides.

(6) The results are helpful for designing and construction main tunnel and adit in major highway tunnel.

(7) By the analysis of the mechanism of deformation and failure of the adit, this paper presents a view which based on the control of the real high of adit, side-pressure is controlled.

(8) Tashan mine are excavated in a main and a auxiliary adit.

(9) Ore passes are the vital haulage passage in the mines using adit ore pass transportation system.