1. Hillside open pit mine: Above the closed-loop mining boundary, it is a hillside open pit mine.

2. Sag open pit mine: Below the closed-loop mining boundary, it is a hollow open pit mine.

3. Closed circle: The closed curve formed by the upper boundary of open-pit mining at the same elevation.

4. Open pits: the sum of pits, steps and open channels formed by open pit mining.

5. Blasting belt: When mining, the working steps are divided into several strips and sequentially produced one by one, and each belt is called a blasting belt.

6. Mining belt: The width of the excavator once excavated is the mining belt.

7. Steps: When open-pit mining, the ore is usually divided into horizontal stratification of a certain thickness, mining from top to bottom and maintaining a certain advanced relationship. In the process of mining, each work level is stepped, and each step is a step.

8. Non-work gang: The surrounding surface of the open pit consisting of the step platform, the slope surface and the bottom of the entry and exit of the mining work is called non-work gang.

9, the final side help: When the non-work help is in the final state, it is called the final side help; the bottom help is located on the side of the lower side of the ore body to help the bottom.

10, top gang: the side of the side of the upper part of the ore body is called the top gang.

11, end help: located at the ends of the ore body to help the end help.

12. Work gang: The side help consisting of the steps that are being mined and the ones to be mined are called work gangs.

13. Final slope angle: The angle between the final slope surface and the horizontal plane is called the final slope angle.

14. Final slope surface: When the non-work slope is at the final boundary, it is called the final slope.

15. Work to help the slope angle: The angle between the work slope and the water level is called the work slope angle.

16. Work to help the slope: The imaginary slope made by the work to help the bottom line of the last step and the bottom line of the bottom step is called the work slope.

17. Work flat: The platform for the work of mining and peeling is called the work flat.

18. The lower final boundary line (bottom perimeter): the intersection of the final leather surface and the bottom plane of the open pit is the lower final boundary line (bottom perimeter) (the platform on the final side is divided into safety platforms according to its purpose, Transport platform and cleaning platform).

19. Safety platform: used to cushion and block the falling rock and slow down the final slope angle to ensure the stability of the final side and the safety of the lower level.

20. Transportation platform: as the transportation contact channel between the working steps and the access and ditch.

21. Cleaning platform: used to block the falling rocks and clean them with cleaning equipment, which plays the role of a safety platform.

22. Stripping ratio: The ratio of the amount of rock removed and the amount of ore that is mined, that is, the amount of rock to be stripped per ton of ore is called the stripping ratio (t/t m3/m3).

23. Average stripping ratio (np): ratio of total rock mass (V) to total ore amount (A) in open-pit mining (t/t m3/m3) np=Vp/Ap.

24. Stratified stripping ratio (nf): The ratio of the amount of rock to the ore volume at a certain level in the open-pit mining boundary (t/t m3/m3)nf=Vf/Af.

25. Horizon stripping ratio (nj): The ratio of rock increment to ore increment (t/t m3/m3)nj=V/A after increasing the unit depth in open-pit mining.

26. Production stripping ratio (ns): the ratio of the amount of rock stripped from the amount of ore mined in a certain production period of the open pit mine (t/t m3/m3) ns=Vs/As.

27. Economically reasonable stripping ratio (njh): refers to the maximum allowable amount of rock excavation (t/t m3/m3) in the open pit mining unit.

28. Total amount of stripping: the sum of the amount of ore produced and the amount of rock produced.

29. Access to the ditch: Establish a transport path between the ground and the working level and between the levels.

30. Open trench: An approximate horizontal channel that is drilled at each level to open up the mining line.

31. Mine production capacity (t/a ton/year): It is expressed by two indexes of ore production capacity (Ak) and ore production capacity (A), namely A=Ak (1+ ns).

32. Reasonable service years of mines: refers to the service life of a mine determined by the best economic benefits and the industrial reserves retained.

33. Open-pit mining boundary and composition: refers to the spatial outline formed by the end of open-pit mining (or a certain period of time). It consists of the surface boundary of the open pit, the bottom perimeter and the four surrounding slopes.

34. Open-pit mining and stripping methods: It is to study the mining, stripping and mining engineering mining procedures in open-pit mining and the temporal and spatial relationships between them.

35, open pit mode of transport: rail transport, road transport, ramps skip hoisting transport, combined transport, the main form of transport belt conveyors, hydraulic transport, and gravity transportation.

36. Blasting parameters: chassis resistance line, hole distance, row spacing, proximity coefficient, borehole ultra deep, filling length, explosive unit consumption and charge per hole.

37. Drilling technology: It is divided into automobile transportation—bulllifting of bulldozers, railway transportation—excavation of excavators, rock excavation of ploughing excavation, front loading of rock, and drainage of rock-discharging machine.

38. Main factors affecting the stability of waste rock yard: topographic slope, abandonment height, basement rock stratum structure and its bearing capacity, geotechnical properties and stacking sequence; common instability phenomena are landslides and debris flows.

Cylindrical Roller Bearing

Cylindrical Roller Bearing, Innovative Cylindrical Roller Bearing, Wooden Mobile Phone Stand

LUOYANG AUTO BEARING CO.,LTD , https://www.ballbearing.nl