The document discusses load haul dump (LHD) trucks, which are specialized machines used in underground mining to scoop extracted ore, load it into carts, and dump it for crushing. It describes the internal components of LHD trucks and how they are designed to fit in restricted mine spaces. The document notes that LHD trucks play an important role in underground haulage and that technology is advancing, including the development of remote-controlled and more powerful and efficient narrow-vein LHD trucks. However, it also states that remotely controlling LHD trucks can make maneuvering more awkward due to their size.

1. •
A PRESENTATION ON :-
•
• LOAD HAUL DUMP(LHD) TRUCK
•
Anil Kilania
B.Tech IV

2. L.H.D TRUCKS
A load haul dump truck (LHD), also known as a scoop
tram, is a specialized loading machine manufactured for the
underground mining industry. LHDs are used to scoop extracted
ore, such as coal, with a bucket, load it into the cart, and dump
it in the bottom of the mine to undergo primary crushing before
being hoisted to the surface out of the mine

4. WORKING OF A LHD
 The LHD is a machine that travels at modest speeds and consists of internal and external
components.
 The internal parts are1.
a bucket,
2.
a small engine,
3.
an emission exhaust,
4.
a diesel exhaust treatment device,
5.
tires and tire accessories,
6.
and ventilation systems.

5. WORKING CONDITIONS
 The LHD was modelled to fit under restricted heights and narrow areas within a
mine. It consists of a long, low and narrow profiler, which makes it adaptable to
mines of all sizes. Because of its size, manoeuvring the LHD is awkward but
beneficial as it evenly distributes the axle weight of the vehicle to allow for a
larger bucket size.

6. LHD IN U/G MINE

7. DEVELOPMENT IN LHD The LHD is an important tool in the process of underground haulage. After all, LHDs are
not just used for loading dump trucks, as these machines can carry out valuable haulage
work when moving material into ore passes. Technology is moving fast in this sector, as
many of the major manufacturers are developing highly automated machines.

8. NEW FEATURES: Remote control has been available for LHDs for some time and this has certainly increased
safety levels in dangerous applications but these systems are becoming ever more
sophisticated.
 One operator will be able to drive up to three LHDs at a time from a remotely-sited station.
 Now narrow vein LHDs are now more powerful and have higher capacities than would have
been possible in the past.

9. DISADVANTAGE OF REMOTE CONTROL LHD