it is the first stage in the search of ore.
In this we study the literature and maps of
There are two methods of prospecting.
1. Direct method
2. Indirect method
It is limited to deposits on surface or near
it consists of visual examination of either
outcrop or loose fragments that have
weathered away from the outcrop
The samples are collected from the
potential site for microscopic study in
2nd stage of mining
samples are obtained by diamond
Different laboratory analyses are carried
out to evaluate the grade and tonnage of
core sample,diamond drill bit and
core samples and diamond drilling.
conclusion is drawn regarding worth
of the deposit.it is called reserve
At the end of this stage feasibility study is
carried out which helps to decide, whether
to abandon or develop the deposit.
is work of opening a mineral deposit for
With it proper mining begins
In this stage mining rights are acquired
Access roads to site are constructed
Power source is acquired
handling and treatment plants
Then access to deposit may be gained by
1. Stripping overburden (surface mining)
2. By excavating openings from surface to
more deeply burried
is actual recovery of mineral
While development work continues
through out life of mine, in exploitation
stage main emphasis is on production.
In this stage mining method is also
The selection of mining method depend upon
1. Economics (comparing costs)
2. technology available
3. Size , shape and depth of ore
4. Ground water,strength of ore and host rock
5. Environmental factors as subsidence on
surface,ventilation,work force etc.
method may be
Two main types
1. Mechanical excavation
2. aqueous excavation