Holes from testing air legs (photo)

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Gwyn
50.2% (Neutral)
Newbie Topic Starter

17 years ago

What are air legs, please/.

Photograph:

🔗Camborne-School-Test-Granite-Mine-User-Album-Image-003[linkphoto]Camborne-School-Test-Granite-Mine-User-Album-Image-003[/linkphoto][/link]

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Manicminer
50.2% (Neutral)
Newbie

17 years ago

A rockdrill and an airleg.

The rockdrill is attached to the airleg and is used to control the rate of feed of the drill as it's being pushed into the rockface(and hold the rockdrill up).

Gold is where you find it

scooptram
50.2% (Neutral)
Newbie

17 years ago

looks like a holman 303 jack leg!

Manicminer
50.2% (Neutral)
Newbie

17 years ago

"scooptram" wrote:
looks like a holman 303 jack leg!

It is yes 😉

Gold is where you find it

scooptram
50.2% (Neutral)
Newbie

17 years ago

rather use the sig machine myself and as for the new panthers well what a load of s**t we still got 303s and some sigs at work still use them

Gwyn
50.2% (Neutral)
Newbie Topic Starter

17 years ago

Can you, please, explain in some more detail how this all works and its relationship with all the holes?

Manicminer
50.2% (Neutral)
Newbie

17 years ago

"Gwyn" wrote:
Can you, please, explain in some more detail how this all works and its relationship with all the holes?

Some poor ****** had to stand there and drill a hole to see if the air leg worked. A few weeks might go by and he would have to go back and drill another hole to test a different air leg.

The seals go in them and they were probably rebuilt and this location was quite close and easy to get to from the workshop.

Gold is where you find it

scooptram
50.2% (Neutral)
Newbie

17 years ago

the photo is of camborne school of mines test mine ,this was the old holman test site where all new designs where tested to destruction (its not a mine just a load of levels) there are more holes per foot in this place than anywhere else in the world (probbaly) the test mine is just outside Troon nr Camborne cornwall

Mr Pete
50.2% (Neutral)
Newbie

17 years ago

Ah! Would you look at that, its funny how many forums this hole keeps turning up on? Iv put a good few holes in the place my self learning the craft of rock drilling etc. 😉

Jimbo
50.2% (Neutral)
Newbie

17 years ago

#10

🔗Personal-Album-69-Image-001[linkphoto]Personal-Album-69-Image-001[/linkphoto][/link]

Hope this helps a bit Gwyn 😉

"PDHMS, WMRG, DCC, Welsh Mines Society, Northern Mines Research Group, Nenthead Mines Society and General Forum Gobshite!"

scooptram
50.2% (Neutral)
Newbie

17 years ago

#11

well thats a sigg and the water hose isnt conected up! :lol:

Gwyn
50.2% (Neutral)
Newbie Topic Starter

17 years ago

#12

I was beginning to think that I was being obtuse and stupid!!
Thank you, Jimbo, I now understand!
I take it that it's air powered and the ref. to water is for dust control, cooling and lubrication/cleaning of the drill bit?
Is the drill rotational and/or percussive?
What of the bit tips? TCT? Diamond?
Cheers, Gwyn. :thumbsup:

Gwyn
50.2% (Neutral)
Newbie Topic Starter

17 years ago

#13

Is the definition that I have entered into the Aditnow mining dictionary correct? Please check and comment. Thanks. 😉

Jimbo
50.2% (Neutral)
Newbie

17 years ago

#14

Yes air powered drill with air operated hydraulic leg to support the drill & apply pressure to the drill steel/bit.

The drill is both rotary & percussive, as you guessed the water is mainly for cooling & lubricating/flushing the bit.

Various types of tips/drill lengths available depending on the type of rock being drilled. A very common type of drill throughout the Worlds mines.

This is a working example in an Australian Gold Mine & bloody noisy too :lol:

"PDHMS, WMRG, DCC, Welsh Mines Society, Northern Mines Research Group, Nenthead Mines Society and General Forum Gobshite!"