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LOAD HAUL DUMP MACHINE (LHD) IN UNDERGROUND MINES

LOAD HAUL DUMP MACHINE (LHD)

LOAD HAUL DUMP MACHINE

L.H.D is used in underground mines for the loading, hauling and dumping of the material from the working face.
L.H.D’S  are used in more than 75% of the u/g mines throughout the world. 
L.H.D are available in both Diesel & Electric versions.
Diesel version is easily transportable from one location to another and have diesel engines as power drive of 75 to 150 HP or more.
Engines are either water or air cooled.
L.H.D with Electric motors as drives have general capacity of 75 to 150 HP.
These are operative at medium voltage of 380 to 550 volts.
Flexible trailing cables are provided with reeling/unreeling facility to feed power.
In L.H.D machine an axial piston type motor is used.
The maximum speed of L.H.D is nearly, 8-10 km/hr. when the  machine is Empty.  But when the L.H.D machine is loaded the maximum speed is 3-5 km/hr.
The standard bucket capacity of the L.H.D is  1.6𝒎^𝟑.
The bucket is uplifted with the help of hydraulic pressure.
The expected output per day is 200te - 500te/day.
L.H.D has electrical flameproof components.
L.H.D is suitable where, Thickness of seam is more than 1.8m.
The average gradient of seam should be 1 in 7. if it is more than this then L.H.D machine will not work on it.
L.H.D machine is tire mounted.

SAFETY PROVISIONS

In L.H.D machine emergency and parking brakes with fire resistant hydraulic fluid is used.
Head lights, audible warning signal, back up alarm and portable fire extinguisher are provided. 
Special cabin/canopy is also provided for safety of operator. 
A safety device is provided to shut off the engine if exhaust gases exceed temperature of 〖𝟖𝟓〗^𝟎C( or as per set value).

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