Task 5 Choose the best answer to each question
1. What kind of mining is surface mining?
a. a form of under water mining
b. the other way of underground mining in which the overlying rock is left behind and the required mineral deposits are removed through shafts and tunnels
c. a combination of digging, blasting and excavation
2. How is the pit in an open-pit mine created?
a. by digging
b. by removing overburden
c. by blasting with explosives and drilling
3. How is high wall mining conducted?
a. you start with an open-pit mine and then drill into those walls to extract more resources
b. you blast walls and then extract resources
c. you dig huge holes to extract resources
4. What excavation equipment is used in the process of dredging?
a. underwater shovels
b. an endless chain of open buckets that travel around a truss or a ladder
c. hoppers and sprockets
5. How is the process of loose rock mining conducted?
a. it is a continuous process with extraction and haulage running in series
b. it requires blasting and drilling stages
c. it requires continuous blasting and loading
6. How is the process of solid rock mining conducted?
a. it requires digging and loading
b. it requires blasting overburden
c. it requires a discontinuous process of drilling and blasting and then loading and haulage stages
7. What equipment do strip mining techniques include?
a. dredges and drill rigs
b. shovels, trucks, drag lines, bucket wheel excavators and scrapers
c. crushers and mills
8. What is the first process that most ores undergo after mining?
a. haulage
b. loading
c. mineral processing
Task 6 Choose the correct word from the choices offered
1. Drilling equipment is selected on the basis of the nature\structure\shape of the ore and the speed and depth of holes necessary to fracture a specified tonnage of ore peer day.
2. Mechanical drilling and blasting are the first steps in extracting ore from most open-pit mines and the most common method used to remove loose minerals\solid rocks\hard rock overburden.
3. While there are many mechanical devices capable loosening hard rock drilling\explosives\digging are preferred method.
4. In open-pit mining loading equipment matches with haul trucks\rubber-tyred trucks\front-end loaders that can be loaded in three to five cycles or passes of shovel.
5. Hydraulic shovels\ cable shovels\ table shovels are not preferred for digging hard rock.
6. Large table shovels\cable shovels\hydraulic shovels with payloads of about 50 cubic meters are preferred at mines where production exceeds 200 000 tonnes per day.
7. Haulage in open-pit and strip mines is accompanied by front-end loaders\ haul trucks\rubber-tyred loaders.
8. Left lane traffic\ right lane traffic\single direction traffic is frequently preferred to improve operator visibility of tyre position on very large trucks.
9. Crushers are conducted in a modular form to support\ to allow\ to enable some portability within a mine.
10. Comminution begins by crushing the ore to a certain size and finishes by grinding into small particles\powder\a crushed material.
11. In order to produce a crushed material for use as crushed stones\mill feed\flagstone crushing is done in stages.
12. In the first stage, the devices used are mostly cone crushers\cylinder mills\jaw crushers with opening as wide as two metres.
13. Cylinder mill\autogenous mill\semi-autogenous mill operates without grinding bodied, instead, the coarser part of the ore simply grinds itself.
14. There is another development, combining crushing and grinding, it is jaw mill\the cylinder mill\the roll crusher.