There are three types of in-pit crushing systems: stationary/permanent systems use large capacity crushers installed permanently near the pit floor to crush material transported from working faces by trucks; relocatable/movable systems use medium capacity crushers without extensive foundations that crush material transported from faces by trucks and discharge onto relocatable conveyors; mobile systems use fully mobile small capacity crushers located near faces that are fed directly by excavators and discharge onto shiftable face conveyors.

1. INDIAN INSTITUTE OF TECHNOLOGY
(INDIAN SCHOOL OF MINES)
DHANBAD

2. IN-PIT CRUSHING AND
CONVEYING SYSTEMS
P.SHASHIKANTH
16MT001042
M.TECH(ME)

3. Types of In-pit Crushing Systems
The various in-pit crushing systems may be
classified into three(3) categories –
Stationary/Permanent in-pit crushing system,
Relocatable/Movable in-pit crushing system
and
Mobile in-pit crushing system.

4. STATIONARY IN-PIT CRUSHING
SYSTEM
In this system, large capacity crusher with
proper foundation are installed in permanent
locations at or near the pit floor level. The
material excavated and loaded by shovel, from
all the working faces are transported to the
respective crusher by trucks, and thereafter the
crushed material is transported to respective
location by stationary conveyors.

7. RELOCATABLE/MOVABLE IN-PIT
CRUSHING SYSTEM
In this system, the crushers used are of medium
capacity, and they that do not require extensive
foundation work as required by stationary in-pit
crushers. The material excavated and loaded by
shovel is transported by trucks from the face to
the crusher. The crusher discharges onto
relocatable conveyor which in turn transfers the
material to the stationary conveyor.

10. MOBILE IN-PIT CRUSHING SYSTEM
In this system, the crusher is fully mobile and is
located near the face. The crusher is fed directly
by an excavator. The crusher discharges either
directly or via a belt wagon onto the shiftable
face conveyor. Finally the material is conveyed
to the respective destination through a network
of belt conveyors. The crushers are generally of
small capacity sufficient to handle the
production from the face where it is located.