Blasting hard rock in Olinda

Another little back yard job, this time high up in the Dandenong Ranges in Olinda. Peter from PJD Building was adding an extension to an existing house when he found this massive Rhyodacite floater just below the surface. It had to go, there was no way around it, so we drilled 39 holes in the two rocks and destroyed them the very next day. Thanks to Lee from Clean Cut Excavations.
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[@davidream5175]

Sweet shots Dave! Very technical blasting in tight quarters.

[@demolitiondavedrillandblast]

Yes indeed, That is what I have done the most of David.

[@bigredracer7848]

1.8K+👍's up thanks for taking us all along with you for the great demolition

[@demolitiondavedrillandblast]

Thanks for coming

[@paoemantega8793]

nice work again dave - that pile a dirt just burped, hardly moved at all

[@demolitiondavedrillandblast]

That is the only way to do it in the suburbs.

[@CraigRippon]

Well done - blasting so close to a house - amazing

[@albertbm3105]

Cirugian blast, thanks for share it. Perfect job ... 👏👏👏

[@demolitiondavedrillandblast]

Thanks

[@Joserocha-wm9de]

A real pro 👌👌 , its not for everyone ... Great job sir

[@demolitiondavedrillandblast]

Thanks for watching Jose.

[@habbi126]

Thanks for uploading!😆

[@berdooflyer]

Ever had the drill, itself, end up inadvertently breaking rock? I probably already know the answer, but I'm curious. Cheers from the US.

[@demolitiondavedrillandblast]

Yes, sometimes the rock just breaks from the impact energy of the drill.

[@mysurareddy7799]

Nice idea bro

[@SpringDivers]

That jack hammer must take a toll on your nerves.

[@demolitiondavedrillandblast]

I hardly notice it Wayne.

[@crackwitz]

all the downvotes have a rock for a mother

[@romandybala]

Are there ever issuea with cracking plaster in the houses. Do the shockwaves travel far.?

[@demolitiondavedrillandblast]

Good question Roman, there has been a very large amount of research done on this subject and we always work within conservative limits and usually design the blast so that the Peak Particle Velocity (vector sum of the three axis of ground movement) does not exceed 10mm/s. The plaster cracking threshold is around 110mm/s, Bricks and mortar crack ~ 200mm/s. Good video on this topic here - kzbin.info/www/bejne/e36Wnnemi9SMsJY

[@sighpocket5]

Nice!!!!

[@markdwyer314]

Hi Dave. From what I know, ryodacite is about 5.5 on Moh's scale; when rocks are harder to you need to use an explosive with higher VoD? If you don't mind me asking, what sort of explosive did you use here? Did you use Millisecond delays to minimise ground vibration?Cheers!

[@demolitiondavedrillandblast]

The explosive was Orica Senatal Magnum 32mm packaged emulsion, millisecond delays were 25ms between holes and 67 between rows.

[@markdwyer314]

Thanks Dave

[@kevinbyrne4538]

Sometimes you use blasting to split boulders; other times, you use rock-splitting mortar. I suspect that mortar is used when blasting can't be used.

[@demolitiondavedrillandblast]

HI Kevin, you are correct although sometimes a customer will specify that they do not want to use explosives for whatever reason. Sometimes we use both on the same job, such as in the case where we want a nice strait split edge on a very large rock but the vibration would be excessive if we used a heap of detonating cord and fired all these holes together, so the chemical cracking agent is a very useful tool.

[@gaurabhkhatik2602]

Kevin Byrne

[@richardyoung5217]

After a dozen or so years of using jackhammers i wonder how his kidneys are holding up. I knoe my body could not have taken what he does even when i was younger.

[@demolitiondavedrillandblast]

I've got 27 years and about 35,000 meters on the drill Richard, holding up OK. I can see that there will be a time when I do drill rig only jobs though.

[@hindugoat2302]

the guy who cleared the land for the house would of found that for sure its just below the surface and huge, they just cover it over and ignore it

[@demolitiondavedrillandblast]

This one was not in the way of the original build but had to go when they were extending.

[@damodoesall6240]

I love a man in red overalls

[@demolitiondavedrillandblast]

They are red so that you can not see the blood that I sweat drilling all those holes

[@elc2k385]

Cool

[@vtvcuocsongthuongngayonong2537]

Rất giỏi

[@mixtapemasala9843]

Hi.

[@demolitiondavedrillandblast]

Hi

[@mixtapemasala9843]

@@demolitiondavedrillandblast I can contact u

[@demolitiondavedrillandblast]

dave at demolitiondave dot com dot au

[@garage_34]

after demolished hardrock, try next on Starbucks..

[@demolitiondavedrillandblast]

Get a bad coffee recently?

[@garage_34]

hahaha

[@andrewallason4530]

@@demolitiondavedrillandblast I’d hardly call Starbucks ‘product’ coffee. 🤮

[@hidgik]

This has been predicted in some holy book or the other, I am sure.

[@underwrldimp7371]

I watched video to see a rock explode! not a mound of dirt move slightly, geez.

[@demolitiondavedrillandblast]

maybe some of my other videos with a bit more action would be more to your liking? kzbin.info/www/bejne/paCcZodjjb1lj8k kzbin.info/www/bejne/hHbSeYeXhZ2WmpY kzbin.info/www/bejne/fouadnuBoMScfJY kzbin.info/www/bejne/kF7JYauNhdh8ocU kzbin.info/www/bejne/aaKkcn1noK-MZ5I kzbin.info/www/bejne/aJDXqamaZ5pootE kzbin.info/www/bejne/fHyQXmqlZ8eZfas

[@markohelenin8731]

NONEL Blasting caps 1500 bucks, dynamite 2 bucks

[@pokokemelu1049]

💣💣💣💣💣💣..yes

[@racing_alkamil6728]

Batu akik..😅😆😅😆😅😆

[@kallurinaveen2946]

Iam in tha varku company In Hyderabad IDL

[@demolitiondavedrillandblast]

Can you send me some free samples?

[@reapouch7187]

💎💎💎💎💎💎💎💎💎💎💎💎

[@SamKhan-oi4kx]

Rocks just hiccups