Which of the following is the ore breaking methods?( )
A: Artificial ore breaking
B: Mechanical and hydraulic ore breaking
C: Rock drilling and blasting
D: The other three options all meet the requirements
A: Artificial ore breaking
B: Mechanical and hydraulic ore breaking
C: Rock drilling and blasting
D: The other three options all meet the requirements
举一反三
- 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
- At present, the methods of ore and rock loosening and crushing are mechanical loosening and crushing, blasting, loose and broken method.
- Which of the following is not included in the ore transportation method?( ) A: Gravity transportation B: Mechanical transportation C: Drilling transportation D: Hydraulic transportation
- The main production links of the open-pit production process include ( ). A: Ore and rock preparation B: Mining and loading C: Transportation D: Breaking
- Which of the following is the most abundant solid mineral in the seabed?( ) A: Manganese nodule B: Nickel ore C: Copper mine D: Cobalt ore