MINING METHODS QUIZ - 1

1. which one of the following term is not related to opencast mining?

1. Boxcut
2. Highwall
3. Crest
4. winze

2. As per MMR 1961, mine plan of a having large opencast working shall be on a scale having a representative factor of?

1. 200:1
2. 4000:1
3. 1000:1
4. 2000:1

3. Maximum permissible gradient for the haul road in opencast mines is?

1. 12°
2. 13°
3. 16°
4. 15°

4. In Case of an opencast blasting the danger zone comprises of area within the radius of

1. 300 meters from the place of during
2. 400 meters from the place of during
3. 500 meters from the place of during
4. 600 meters from the place of during

5. in case of an O.C. mine, if the pit wall are too steep to allow suitable bends the layout of haull road geometry selected should be?

1. switch back
2. spiral
3. zigzag
4. none of the above

6. to open a mine for deep seated, the cut used is

1. external box cut
2. internal box cut
3. trench
4. Deep cut

7. In ultimate pit analysis the most widely used method is

1. heuristic technique
2. dynamic programming
3. linear programming
4. simulation

8. for O.B. removal with shovel-dumper combination, the optimum size of the dumper depends on

1. distance of the haul
2. distance of the hall and size of the shovel
3. size of the shovel
4. Tonnage to be handled

9. the blasting technique used for controlled throw of overburden is known as

1. Coyote blasting
2. cast blasting
3. plaster blasting
4. pop shooting

10. which one of the following is the most likely mode of slope failure for waste dump

1. circular
2. toppling
3. wedge
4. plane