Укажите, какие предложения соответствуют содержанию текста. Подтвердите свои ответы фактами из текста

1. Ore deposits may be called economically workable natural
concentrations of minerals.

2. It is quite enough to take into consideration the shape of the
deposit for choosing its method of working.

3. The thickness of ore deposits is a constant value.

4. As a rule exploration provides information for mining.

5. Equipment of various types and capacities is readily available
for rock excavation and it includes power shovels, backhoes,
draglines, bucket wheel excavators, etc.

6. After mining or dredging ores are usually processed, crushed
or dried.

Unit 9_____________________________________________ 231

28. Ответьте на следующие вопросы:

1. What minerals do we usually call economic?

2. Is the type of ore the only factor which the engineer takes into
consideration in choosing the methods of working ore deposits?

3. What does a rational method of mining guarantee?

4. What does before mining activity include?

5. What processes does development work involve?

6. What basic sloping methods are in use now?

7. What are the main methods of working bedded deposits?

8. Is underground or open-cast mining preferable now? Why?

9. Can you give a few examples of the largest enterprises
producing ores in the country?

29. Найдите в правой колонке русские эквиваленты следующих слов и со­
четаний слов:

Block caving а) породный отвал, терриконик

Crushing and diving б) открытые горные работы, вскрыша

Power shovel в) блоковое (этажное) оборудование

Grabbing г) дробление и сушка

To range (from... to) д) врубо-погрузочная машина, горный

Remote control комбайн

Shrinkage sloping e) колебаться (в определенных пределах)

Waste heap ж) погрузка грейфером

Cutter-loader з) дистанционное управление

Overcasting and side- и) выемка системой с магазинированием

Casting к) механическая лопата, экскаватор

Stripping operations л) перелопачивание и внешнее

Отвалообразование

30. Заполните пропуски приведенными словами:

А) load loader loading

1. Mining machines which break out coal or rock from the face
and... it on the face conveyer are called either cutter-...s or
tunnelling machines.

2. According to the classification the mining machines are
divided into three main groups: for breaking rock, for... and
transporting and setting supports.