Basics

Question 1

Any rock lying in the position in which it was formed, not broken up.

Answer 1

Bedrock.

Question 2

Result from the breaking up of bedrock.

Answer 2

Alluvia (or drift deposits)

Question 3

Usually to expose the bedrock for more detailed investigation the surface alluvium must be removed by digging simple trenches up to

Answer 3

0.25-0.5 m deep

Question 4

A disturbance without a break is

Answer 4

Fold

Question 5

Disturbance with a break is

Answer 5

Fault

Question 6

Horizontal and vertical displacement in fault are

Answer 6

Shift and Throw

Question 7

Thin seam has thickness less than

Answer 7

1.5m

Question 8

Thick seams have thickness more than

Answer 8

3.5m

Question 9

The part of the seam which reaches the surface or lies near it under alluvium is called its

Answer 9

Outcrop

Question 10

Mineral containing ROCK from which metal can be extracted are called

Answer 10

Ore

Question 11

Chalcopyrite CuFeS2 is an

Answer 11

Copper ore

Question 12

Hematite Fe2O3 is an

Answer 12

Iron ore

Question 13

Galena PbS is an

Answer 13

Lead ore

Question 14

Gently sloped angle for seam is less than

Answer 14

25 degree

Question 15

Steep inclined angle for seam is more than

Answer 15

45 degree

Question 16

The rock surfaces at the sides of workings in coal are

Answer 16

Ribs

Question 17

The part of the underground working which reaches the surface or opens into another working is called, for a vertical shaft, its

Answer 17

Collar

Question 18

The part of the underground working which reaches the surface or opens into another working is called, for a tunnel or adit its

Answer 18

Portal

Question 19

Vertical or inclined excavation sunk from the ground level so as to serve the underground workings is a

Answer 19

Shaft

Question 20

Shafts designed for hoisting minerals to the surface is a

Answer 20

Main shaft

Question 21

Shafts designed for transport of men or materials, rock or equipment, and for ventilation or pumping is a

Answer 21

Subsidiary shaft

Question 22

The fresh air enters in to a mine through

Answer 22

Subsidiary shaft

Question 23

The lowest part of the shaft below the lowest decking level is called

Answer 23

Sump

Question 24

Pit used for raising or lowering materials or rock is a

Answer 24

Blind or Staple pit

Question 25

A level driven from the surface is

Answer 25

Adit

Question 26

An underground level with no direct access to the surface, driven at an angle to the strike is a

Answer 26

Crosscut

Question 27

Slope driven in the mineral, down which mineral slides under its own weight is a

Answer 27

Chute