- DRIVES:
- · Drive is a under ground road way driven along the strike
- · They may be driven in Ore, Footwall, Hanging wall
- · Drainage channel is cut on one side or both sides of the floor to flow water
- · Small reef drives are usually 1.2mx 1.8m which can accommodate half ton trucks with single track
- · Drives are 2.1mx 2m to accommodate one ton trucks with single track
- · Locomotives nessaciates extra height
- · Drive with double track for one ton trucks will be 4m x 2.4m
- · When driving a reef drive , on the orebody the hanging wall should be cut as little as possible
- · If the width and dip allows the floor of the drive is kept in foot wall
- · Then the track is un-effected by future stoping operations
- · Drives are kept at a gradient of 1 in 100 to 1 in 200 towards the dip side
- · Main purpose of keeping the gradient are for drainag and transport of loaded trucks
PURPOSE OF
DRIVES
- · Access
- · Sampling
- · Removal of broken rock
- · Transportation
- · Ventilation
- · Drainage
- · Passage of intake/return air
- · Travelling road way
- · Haulage way
- · Carrying pipe lines
- · Carrying electrical cables
- · Stoping/extraction
CONDITIONS
UNDER WHICH THE INITIAL HAULAGE IS LAID ALONG THE PLANE OF THE ORE BODY(FOOTWALL)
DURING MINE DEVELOPMENT
FOOT WALL DRIVES
- · Foot wall drives required usually in deep mines
- · To maintain constant direction of roads
- · To resist the direct pressures from the stope on drives
- · The ore body is connected by cross cut roads and raises and winzes
- · The cross cuts serves as chutes for withdrawing the ore from stopes at the time of stoping
- · Foot wall drives required usually in deep mines
- · To maintain constant direction of roads
- · To resist the direct pressures from the stope on drives
- · The ore body is connected by cross cut roads and raises and winzes
- · The cross cuts serves as chutes for withdrawing the ore from stopes at the time of stoping
purposes of
driving the haulage inclines are laid in foot wall
- · For access
- · For sampling
- · Ventilation
- · Hauling outputs
- · Supply of materials
- · Drainage
- · Passing intake/return air
- · Lighting
- · Laying electric cables/pipe lines
Conditions
under which haulage inclines are laid in foot wall
- · Ore situated at deeper depths
- · Ore present at disturbed zones
- · Ore present at high stress areas
- · Getting more production
- · Mine has to withstand for long periods of life
- · Adopt mechanization
- · Need quick transportation of out put
- · Easy maintenance of roads
MERITS OF
FOOTWALL DRIVES
- · Uniform gradient of roads
- · Roads in constant direction
- · Higher out puts
- · Large scale mechanization possible
- · Higher tramming speeds
- · Less maintenance cost
- · With stand main entrances for long life
- · No problem of roof control
- · Less water accumulation
- · Smooth flow of air in uniform roads is done
- · More safe for men and reserves
- · Employed in deep mines
DEMERITS
OF DRIVES IN FOOTWALL
- · Country rock is harder than ore , difficulty in drilling
- · More consumption of explosives occurs
- · Slow rate of face advancement
- · High cost of drivage
- · Quick return can not be possible
- · Capital held up
- · More investment
- · More time for development
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