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Vocabulary:

Drill–бурить shovel–копать, одноковшовый экскаватор

Hoist – поднимать, опускать bucket – бадья, ковш

Load–загружать boom - стрела

Haulage – откатка

Caterpillar – гусеница

Drill rig –

Quarry - карьер

Drift – штрек (горизонтальный)

Crosscut – квершлаг

Jackhammer – отбойный молоток

Fuse –

Cap –перекладина, взрывной капсюль

Capacity – мощность

Revolve–вращать

Task 2. Finish the sentences.

a) Drilling is done by means of …………...

b) Blasting is done by means of …………..

c) Loading machines are driven by ……...

d) Loading machines most used …………

e) Dragline (excavator) is a machine that…..

Task 3. Answer the question on the text.

  1. What is highly mechanized mining equipment of modern design used at present time in mining?

  2. What is drilling done by?

  3. What kinds of drills are used for work in horizontal and vertical workings?

  4. What is blasting done by?

  5. Where can loading machines be profitably used?

  6. What are two common types of power shovels?

  7. What are most shovels now equipped with?

  8. What is the dragline?

  9. Is the dragline excavator so convenient for loading into wagons or cars

LESSON 8

1. Read and translate the text, do the tasks after reading.

MECHANISMS

S c r a p e r s. Scrapers are now so widely user in mines for loading cars and transporting ore or waste for short distance, are the chief means of reducing the coast of mining by reducing the output of ore per man. Time studies have shown an output of from 15 to 40 tons per hour per miner on contract work. The success of the scrapers in iron mines led to their use in the other mines, where modifications in design have been introduced to adapt the scrapers to the particular conditions present.

The capacity of scraper varies with the type of scraper, the physical characteristics of the material handled – whether fine or lumpy, dry or sticky, light or heavy – the average rope speed and the limitations of space imposed by conditions in the mine. The box scraper has the greatest capacity for its width of any type of scraper. It is especial suitable for mine material such as sand, gravel, cement, screened coal and crushed stone. The hoe type is better suited to coarse, lumpy material. Other things being equal, a large scraper working at low speed is to be preferred to a small scraper working at high speed for the same output. The larger scraper has greater weight and will clean up material to better advantage.

2. Finish the sentences:

  1. Time studies have shown an output of from 15 to 40 tons per hour …

  2. Modifications in design have been introduced to adapt …

  3. The physical characteristics of the material handled – whether fine or …, dry or …, light or … .

  4. The larger scraper has greater weight and will clean up material …

3. Write the equivalent to the following words and learn them by heart:

loading car, reducing, output, to adapt, rope speed, capacity, advantage, sand, gravel, cement, screened coal and crushed stone

4. Find in the text words with the international meaning and translate them into native language.

LESSON 9

1. Read and translate the text independently in a written form, do the tasks after reading.

DRILLING RIG СБШ-250-МНА-32

Drilling Rig is designed for drilling blast holes using cone drill bit with a diameter 243-269 mm, to the depth of 33 m in open cast. It drills vertical and inclined holes. The rig is suitable for drilling vertical and inclined holes (angle -15 and 30 degrees) both in monolith and in cracked dry rock and ore of hardness f= 12-18.

The Rig is self-propelled maneuvering jumbo drill with individual drive of every crawler track.

Drive of rotation of drilling rods is performed from electric motor of direct current.

The construction of the rig provides with the maximal convenience of maintenance.

The main and auxiliary operations of the drilling process are mechanized and automated, the efficient system of wet dust-suppression excludes the possibility of pollution of environment.

The Rig is controlled from the cab. Air conditioner in the cab provides with comfortable conditions of operator’s labour.