Gravity transportation refers to the method that ore from the working face to the stage transportation level completely depends on gravity sliding.
举一反三
- Which of the following is not included in the ore transportation method?( ) A: Gravity transportation B: Mechanical transportation C: Drilling transportation D: Hydraulic transportation
- ad.必然，必定 A: necessarily / ‘nesisərili/ B: gravity / ‘græviti/ C: language / ‘læŋgwidʒ/ D: transportation / trænspɔ:’teiʃən/
- Shipment only refers to transportation by ships.
- Which of the following statements is true?( ) A: The other three options all meet the requirements B: Leveling refers to leveling the surface of ore retention pile after local ore releasing. C: Prying roof means that the roof and two sides of loose ore rock should be pryed off when the site is leveled. D: Gravity ore drawing is generally adopted for local ore releasing
- The main transport stage refers to the stage in which the ore mined in two or more stages is lifted to the ground.