Sewer Trench Blasting

A short look behind the scenes at the work required to install underground services - in this case a sewer pipe in a very rocky new housing estate project.
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[@billsticker]

This isn't just blasting, this is art.

[@vhostovich]

Agree !!!

[@demolitiondavedrillandblast]

Thanks guys.

[@ChrisB257]

Yep - poetry in motion for sure ... most satisfying with the regular delays.

[@demolitiondavedrillandblast]

Couldn't agree more!

[@alfadoofus]

The first 2 shots were a thing of beauty. Great work on the filming.👍

[@demolitiondavedrillandblast]

Thanks Chris.

[@xuejiaoxu6778]

The shock wave is something to marvel at, great in slow motion.

[@jwaterous224]

The artistic popping up of the orange traffic cone is fantastic, Dave! Followed by the long ejection of gases on the second shot that was great too! Plus you get into the hole for the blast finale. Way to go!

[@demolitiondavedrillandblast]

Thanks, the cones are ideal hole plugs.

[@frozenjoe6313]

@@demolitiondavedrillandblast Yes, I noticed that flying cone orange, finale, Looks great.

[@vhostovich]

Just love the different perspectives with slow motion.

[@demolitiondavedrillandblast]

Glad you liked it, give me an opportunity to have a close look at what is going on also.

[@sirskidney7998]

Hey Dave, the slow mo of the first two shots is amazing! Thanks for a great video and happy you haven’t been up to your neck in mud for a while!

[@demolitiondavedrillandblast]

It went from mud to dust over the Christmas holidays Sir, there was no in between this year.

[@billlamond1847]

Fantastic video by a skilled blaster and film maker ATB. Cheers from Scotland.

[@demolitiondavedrillandblast]

Thanks 👍 Glad you enjoyed it Bill

[@terryhooper7249]

Dave the first 2 shots in slmo was like excavator walking across the ground

[@michaelc.3812]

It’s very nice Dave when you have the drilling rig and don’t need to cover the site with 1000 yards of dirt.

[@demolitiondavedrillandblast]

Yes, tell me about it.

[@macw2234]

Terra eruptus. Spectacular stuff Dave

[@johannviljoen64]

Nice one Dave, liked the slow motion shots there.

[@demolitiondavedrillandblast]

Glad you enjoyed it Johann.

[@rockman531]

Hi Dave, Love the 'machine-gun' sound of the rapid firing! Another awesome video! Stay safe in that crazy heat! Jim

[@demolitiondavedrillandblast]

Staying safe at home today Jim, very hot and windy and the water truck failed yesterday.

[@ShaunButterley]

Dave, some days I feel like you have the greatest job in the world. Thanks for sharing it with us!

[@demolitiondavedrillandblast]

Wow, thanks Shaun, some days it does not feel like it to me, like when it is really hot and I have to use the hand drill. Thanks for watching.

[@paulcooper2897]

One of my 2 favorites .. long trench shots ... and No Cover Rock-Splosions when you are in deep back country ... Thanks for sharing 🇨🇦

[@demolitiondavedrillandblast]

Glad you enjoyed it Paul.

[@jimsvideos7201]

Handy bit of work as always Dave; I hope it is comfortable there ahead of summer proper.

[@demolitiondavedrillandblast]

It's good today.

[@Silverhornet81]

Beautiful first shot!

[@demolitiondavedrillandblast]

Thanks.

[@TheGingerGenius78]

Super work lovely wallops :) rock runs scared from you Dave 😂

[@paranoidandroid7718]

Nice one, thanks again, Dave.

[@demolitiondavedrillandblast]

Your very welcome Marvin.

[@Ekaern]

A new video from demo dave fits well with morning coffee and paperwork!

[@demolitiondavedrillandblast]

Thanks for tuning in Richard.

[@themadmanc3187]

Another great video Dave!

[@Michael-rg7mx]

A word about ditches. Once they get more than waist deep have the operator flare it out at a 45° angle. Working in the dry is fairly safe but dirt is heavy. It will squish the life out of my favorite blaster. The digger knows better. I've had to ask a few times and never had a guy complain. They just get sloppy.

[@RogowskiBubba0864]

Morning Dave, thx for the new video. Nice in slowmotion 👌. Have a great day today.

[@demolitiondavedrillandblast]

It will be a great day Arie as I'm having the day off because it is very hot and windy forecast at the site and the water truck has broken down yesterday.

[@ledickin69]

Sounds like a Warthog “Brrrrt”. Good stuff 😉

[@demolitiondavedrillandblast]

First! Nothing like the "Brrrrrrrrrrt"

[@AlexJBaldwin]

Love the Brrrrrrrrrrrrrrrrt!! Replayed that but a few dozen times

[@ledickin69]

@@demolitiondavedrillandblast Poor bastards who buy in that housing estate will be up for $$$ for underground services and heat in summer from shallow rock.

[@demolitiondavedrillandblast]

I'll be going back there over the following years to help with pool excavations etc.

[@daleboulton1169]

Another great video Dave, especially loved the “on grade” shot of the first bang. You’re a tougher man than I, wearing those overalls with the hot weather we’re having, stay safe out there, and thanks again.

[@demolitiondavedrillandblast]

On the hot days I have to be very conscious of de hydration.

[@daleboulton1169]

@@demolitiondavedrillandblast yep, absolutely mate. Take it easy out there.

[@williamjacobs236]

Another great video Dave .

[@demolitiondavedrillandblast]

Glad you enjoyed it

[@markmunro8753]

Man that is great work. That job would have been so difficult with out blasting.😊😊😊

[@demolitiondavedrillandblast]

Tell me about it, I have seen plenty of sad faces on guys that own big excavators and breakers when they try and fail.

[@bobbaer869]

Great video Dave 👍👍

[@demolitiondavedrillandblast]

Glad you enjoyed it Bob.

[@coop_coop007]

I love this channel.

[@demolitiondavedrillandblast]

Thanks for watching, stay tuned for more blasting action.

[@kevdimo6459]

Good one Dave! Loved the rat a tat tat. By geez you earn’t your money hand drilling. Good onya Dave. 👍🏻

[@demolitiondavedrillandblast]

You got that right!

[@xuejiaoxu6778]

Another banger Dave thanks for posting. The drill rig certainly makes life easier.

[@demolitiondavedrillandblast]

Yes it does! Got Two more jobs on the whiteboard for drill rigs.

[@SJR_Media_Group]

*_When all else fails bring in Dynamite Dave and his Team of Experts..._* When you have lots of large diameter bore holes to drill, big hydraulic self powered drill rigs save lots of time and sweat. Great use of the inverted orange cones to keep loose dirt from falling back into the freshly drilled bore holes. They also act like funnels and help when loading the charges into the holes. Looks like ANFO being poured into the holes. It's perfect for trench blasting in hard rock. Slightly slower Detonation Velocities than other HE, so It 'pushes' harder. Still plenty of shock and the Brisance is adequate to shatter rock quite well. It's the Explosive of choice for large quarry type operations. It can be bulk delivered in slurry form and is cost effective compared to other types of HE. *_Fun Fact: When filled with ANFO, a blasthole 400 mm (about 16 inches) in diameter and 7.5 metres (about 25 feet) deep can develop about one billion horsepower. When you see a large quarry blast and thousands of tons of rock are moved forward a hundred feet, you are seeing 'horsepower' on an unimaginable scale._* Dave, great job in doing everything right; right hole diameter, right hole depth, right explosive loaded, right use of delays, and right material used in stemming top of hole. Didn't see a single charge break through top of hole violently. All the energy was directed to right places. Nothing is wasted, no misfires, and no flying rock debris. Not sure if they use Hard Rock trenchers there. In the States there are contractors with huge rigs with hundreds of horsepower cutting or grinding trenches through bedrock. They have a series of Carbide Tips on a continuous belt that rotates like a standard trencher. They have belts of various widths and frame arms of various lengths. They can cut a 1 meter wide by 5 meter deep trench in hard rock no problem. Your geology is unique with random placement of Granite boulders. Mechanical trenchers may not work there. Blasting is more fun to watch anyway. *_I love watching trench blasting and wonder if I can outrun the series of explosions._*

[@thelamb288]

Bill Sticker said it all Dave :D , Cheers

[@tokencivilian8507]

That did blowed up real good. Wow, loved the slo mo shot as the det came toward the camera. Masterful framing with the camera. Great stuff, as always DD.

[@davidholder3207]

There's no doubt about it your a 'Master Blaster' Dave. First time I've seen you use the "Tommy6 Gun" effect fuses. I give you 👍👍👍👍👍

[@demolitiondavedrillandblast]

Here is a few more for you - kzbin.info/www/bejne/pHKpXmh6ateImac

[@spikeydapikey1483]

Sounded like an A10 Warthog strafing run !!

[@demolitiondavedrillandblast]

"Brrrrrrrrrrrrrrt"

[@Green_House]

The master at work. 🙂

[@kenpool8507]

That was awesome! The first shot sounded like an A-10 Warthog punishing their targets. Great job on the multiple angles. Thank you and have a great day

[@demolitiondavedrillandblast]

Brrrrrrrrrrrt!

[@longlowdog]

Great video Dave. Your camera work was on point as always. Regards from Scotland.

[@demolitiondavedrillandblast]

Glad you enjoyed it, there will be some longer trench shots next month hopefully.

[@buggerlugz6753]

What an awesome job!

[@demolitiondavedrillandblast]

Thank you! Cheers!

[@keithmoore5306]

you had this sounding like a V1 buzz bomb!!

[@nmopzzz]

In watching all of your videos I think i see a great way to increase your productivity. Drill the holes farther apart like you do in the forest. This seems to work the best. Very rarely do you ever have to reblast. Plus you won't waist all of the time drilling those extra holes. It will also decrease all of the wasted time digging the rocks out. I don''t understand why an experienced small business owner like youself could have missed this where as I, with absolutly no experince at all in the field can see this. Lucky for you I watch your videos and can help to guide your career. Follow my advice and I can even decrease your living expenses... What could possibly go wrong??????

[@vsvnrg3263]

those first 2 blasts-absolute precision. that drill rig would have been frighteningly expensive to hire.

[@demolitiondavedrillandblast]

Yes, the drill rig is not cheap but it gets a lot of work done in a very short time.

[@vsvnrg3263]

@@demolitiondavedrillandblast , of course. whenever i watch you drilling sideways or standing on uneven ground my wrists are hurting merely watching you. so i ask what is the smallest drilling rig that can be fitted on the smaller mini excavators? and have you considered buying one?

[@demolitiondavedrillandblast]

@vsv nrg I got one, see here - kzbin.info/www/bejne/e4uxhX1nq96nr5o

[@vsvnrg3263]

@@demolitiondavedrillandblast , oh yes, ive seen that one many times. i meant something that fits on a 1.2 tonner. you obviously dont think you need one and of course it wont fit in the cab of the ute. you would always need to use the truck to cart it around. i didnt think of that. utes are much easier to drive around than a truck.

[@williambryce8527]

Outstanding slomo and sound on the long trench shots! Seemed like quite the long delay on that last shot you hand drilled.

[@timothypirnat3754]

Nice blasting Dave. Fun to watch,

[@WootTootZoot]

Thanks Ricky

[@andygray9285]

Nice job as usual.

[@demolitiondavedrillandblast]

Thanks Andy, the blast was a bit on the conservative side because it had to be.

[@stillwater62]

That was a super nice video, Dave, especially the slow-motion part. A lot of time and work, gone in two or three seconds of video. It is always good to see and hear the rumble from down under. Thanks for the video, Dave. Take care, be safe. Cheers.

[@demolitiondavedrillandblast]

A lot of $$$ went up in smoke in that very short time also #62

[@Richard-vw8no]

Very impressive work.

[@demolitiondavedrillandblast]

Thank you Richard, I would have liked to loaded this one a bit harder but vibration concerns were a serious consideration, even so it dug out pretty well. Thanks for watching and contributing.

[@westvirginiaridgewalker]

This isn’t just blasting this is Dr Dave preforming rock surgery!

[@demolitiondavedrillandblast]

Thanks Eric.

[@yt650]

All I can say, is, my favorite blasting, love the trench blasting.

[@demolitiondavedrillandblast]

Here is a few more for you - kzbin.info/www/bejne/pHKpXmh6ateImac

[@dennis2376]

It sounds like, sort of, a train or a machine gun going off. Very cool! Thank you and have a great week.

[@demolitiondavedrillandblast]

Thanks for watching Dennis.

[@ReadTheShrill]

I had a Vietnam flashback during the slo-mo at 2:10

[@wdwerker]

I liked the fountain of dust from one end of the row and the cloud that escaped from the side . Guessing the pressure found an easier way out.

[@demolitiondavedrillandblast]

Correct.

[@jimwilloughby]

Beautifly done, Dave. I'll betb you were happy you didn't have to drill all those houles yourself.

[@demolitiondavedrillandblast]

Oh, heck yeah Jim.

[@art1muz13]

Dave; keep 'em coming, fast and hot! That's what the algorithm loves!! That was thee most awesome content!!! If only we could do a crowd-fund to do that into the toilets of ji-ji pingy and ''IVAN'' (the guy that's pushing darkness on Ukraine), whilst they sat on the pot!

[@demolitiondavedrillandblast]

There is a lot of untreated darkness in this world Artemus.

[@brunomckay1875]

Great stuff mate, excellent camera angles, I hope you charged the pricks heaps for the variations, also hope the project manager was informed of his pedigree. Keep up the excellent vids cuz.

[@mysterysniper910]

the second blast sounded like the gua from an a-10 warthog plane

[@demolitiondavedrillandblast]

"Brrrrrrrrrrrrt"

[@brianpatrick9480]

Impressive!

[@demolitiondavedrillandblast]

Thanks for tuning in Brian.

[@Hutch400]

Loved it, more please!

[@demolitiondavedrillandblast]

I'm working on that Kelly

[@LostCylon]

The ''Ha ha ha, that was actually quite disapointing Dave'' comment by a worker was hilarious. That was the best shot I have seen :). The second shot, there was a plume, and an outgassing from the right a bit further on, what happened there Dave?

[@Travis_22]

Nice!

[@demolitiondavedrillandblast]

Thank you! Cheers!

[@SansNeural]

Your Rock in Hard Partner Excavation.

[@demolitiondavedrillandblast]

I saw what you did there, very good.

[@grumpyg9350]

That was sooo cool👍👍👏🏻👏🏻🤪

[@andymacdonald30]

I think you have the best job ever LOL

[@demolitiondavedrillandblast]

Thanks Andy.

[@scotthultin7769]

371👍's up definitely should Dave the most explosive guy on KZbin thank you for sharing

[@demolitiondavedrillandblast]

Thanks for watching again Scott.

[@grahamcifuentes4451]

You bloody near need yourself a little E-scooter to do the rounds of all those cameras on those big runs mister Dave!

[@bootsnall8996]

Geez Dave the only thing that flew was the cone.

[@briangarland9883]

Wonderful work! Looks like building in that area could be difficult.

[@demolitiondavedrillandblast]

I'll be back when the residents want swimming pools.

[@landlifem5872]

Now that was satisfying

[@demolitiondavedrillandblast]

Thanks for watching!

[@JhonDiamond2021]

good sharing my friend

[@demolitiondavedrillandblast]

Thanks for watching.

[@TrevorDennis100]

Oh wow! That slow mow progression @4:35 is like an angry giant train bearing down on you. This job must have used an enormous amount of charges. Blimey Dave. I hope you never have to work in a trench like we saw @12:40 That was super unstable and likely to cave in on you. Have you ever had any scary moments working in a trench?

[@demolitiondavedrillandblast]

You got that right, I would not be going in there!

[@bobjoncas2814]

lookin; good, keep safe and well...

[@demolitiondavedrillandblast]

Thanks, you too!

[@tugboat2739]

Howdy demo Dave

[@demolitiondavedrillandblast]

Howdy Tugboat, what have you been hauling lately?

[@mozismobile]

What caused the dust geyser at 14:00 in? Looked like your filler just blew straight out of the hole? Also, the dust cloud off to the right a few seconds later is presumably a crack in the rock letting your bang out?

[@demolitiondavedrillandblast]

This was a hole that did not get loaded because it was closest to the previous shot and got damaged during the first blast and as a result it no longer went full depth because of the rock movement. It just served as a chimney to let some of the gasses out.

[@bengatt]

after watching the slo motion and your explanation Dave i understand why those cracks appeared outside the line now. It amazing just how much gas is produce.

[@mozismobile]

Ah, ithanks for the explanation

[@markmayer2029]

Hey Dave, how do stay so clean after running the sinker? I am usually black or brown after 20 holes. Thanks for the videos.

[@demolitiondavedrillandblast]

Clean.... I get filthy Mark, that is one reason why I use the coveralls, so I can peel them and drive home mostly clean.

[@johnolsen7073]

I helped a blaster once do stumping at his neighbours place. He asked her where she wanted the stumps piled? He set the charges and he piled the stumps where she wanted. Quite a site to watch him do that. One question; you work with great skill but can you blow out the candle without denting the candle stick? Just kidding good work!

[@demolitiondavedrillandblast]

He sounds like a magician.

[@ferstuck37]

Dave, I see you used the big drill how far did you have to go to satisfy requirements, and I know you have mentioned it before! But how do you stagger shots over a distance like here.

[@demolitiondavedrillandblast]

There is 2 holes per meter and they are all connected with 25ms surface delay clips between each hole.

[@rodrod383]

is it true that driller/blasters have to go commando under their coveralls?

[@jeffmcgrath2202]

How much dirt did you put on top of your third shot seemed to really keep the blast under control

[@demolitiondavedrillandblast]

About a meter.

[@thisismissem]

Question: what happens with the remaining plastic from the det-cord? Does it just get left behind, or is the plastic separated out?

[@demolitiondavedrillandblast]

The left over plastic is not det cord (det cord gets consumed in the blast) but signal tube and I collect as much of it as I can.

[@peterjames2004]

i know this is a daft question but do you like usin the hand drill or is it a case of having to

[@peterjames2004]

what i mean is i love ploughing and watching the ground turn over if you get me

[@demolitiondavedrillandblast]

I don't mind using it Peter. it is physically punishing but like anything you harden up to it and I have good upper back torso muscle development as a result. I do balk a bit when it is really hot weather, especially when the rig could have done it in 10 minutes.

[@insAneTunA]

👍

[@buggerlugz6753]

question. Why do you sometimes detonate all the charges at once, and other times have them detonate in sequence?

[@demolitiondavedrillandblast]

Good question. The cheapest way is to use det cord and tie all the holes together so that they fire all at time same time, the down side of this is that the ground vibration is often very big and people complain, you may even cause building damage! The solution is to fire the holes sequentially, it cost more but another benefit is the this method also gives much better fragmentation for easier digging.

[@HollerboyHellbilly]

I am curious.....What was the "eruption" near the camera at 3:52? It seemed to have a strong pressure release for an extended amount of time.

[@demolitiondavedrillandblast]

This was a hole that did not get loaded because it was closest to the previous shot and got damaged during the first blast and as a result it no longer went full depth because of the rock movement. It just served as a chimney to let some of the gasses out.

[@onebridge7231]

That’s one expensive sewer trench.

[@demolitiondavedrillandblast]

Not as expensive as it would have been if they spent 2 weeks with a huge machine with a breaker and failed very badly - like what happened just around the corner.

[@moimjk7259]

Dave, I like your videos. My heart has a special place for the 1812 edition. In this one, at 4.20 one of the first explosions shoots a plume of smoke/dirt into the air more noticeable than all the others. What has caused this?

[@demolitiondavedrillandblast]

This was a hole that did not get loaded because it was closest to the previous shot and got damaged during the first blast and as a result it no longer went full depth because of the rock movement. It just served as a chimney to let some of the gasses out

[@moimjk7259]

Thanks for the response. Interested to know your if you gained your expertise through service training or apprenticeship/academic route. Know a guy in New York state who might need help to blow the top off his mountain. Doesn't seem to be getting the best results from the local outfit. Just kidding.

[@demolitiondavedrillandblast]

It started when I was very young.

[@danosmixedgrill6067]

Hi, I have a physics question. If you are standing next to the blasting path say half way along, do you get the classic doppler effect pitch rise & fall as it goes past? A quick mental simulation experiment I just did says NO as theres nothing actually moving past you, just a series of still events aranged so that it gives the illusion of a single object moving past. Have you noticed what actually happens in reality? Cheers Daniel.

[@demolitiondavedrillandblast]

Good question Dano, just been having a think about it and by my calculation the Doppler shift would indeed be noticeable. The pulse repetition rate is 40Hz and at 2 holes per meter that puts the speed at 72KpH so assuming you are standing right beside the trench to minimize any cosign error the apparent Brrrrrrrt frequency oncoming would be 48.4Hz and 33Hz when it has passed. I have never noticed such a phenomena so you are probably correct... but I never stand right beside the trench for best effect. I'm really going to have to test this out with an old phone camera right up close.

[@Wilbargosh]

I notice you found the sewer pipe at the pit with the digging bucket……

[@demolitiondavedrillandblast]

Yes, he had is "pipe locator" bucket on.

[@peteacher52]

It must piss you off when wrong information given causes you a heap of extra bone-jarring labour. That's worth another $1000 on the bill!

[@demolitiondavedrillandblast]

Yep, could have been drilled all the way by the drill rig.

[@jasethesmiff5683]

Cool. I think i upset zac too

[@demolitiondavedrillandblast]

Oh... Huh?

[@tiredoldmechanic1791]

I suspect you were overjoyed that you got the opportunity to hand drill because they guessed wrong?

[@demolitiondavedrillandblast]

I don't balk at using a hand drill Tom, when it is planned, just a bit annoyed when we had the rig there and did not get to use it when we could have.

[@cleanmachine08]

Are your Go Pros getting danger pay penalty rates?

[@demolitiondavedrillandblast]

They just take it in their stride, yawn... another day at the office.

[@adropbear09]

Just out of curiosity, is the det cord biodegradable.? 🏴‍☠🌏

[@demolitiondavedrillandblast]

This is plastic shock tube, I pick up and remove as much as I can.

[@rodneymayfield3352]

HMM interesting doing a.25 speed slomo and you can see gases rising from the ground about 1.5/2 m outside of the orange cones @3:57

[@demolitiondavedrillandblast]

Good spotting, I helped a guy with a shot like this once, a very deep one, so much gas came out that it lifter the bitumen on the road near by.

[@scruffy6151]

👍👍👍🧨🧨

[@demolitiondavedrillandblast]

Thanks for tuning in again.

[@aquilaaudax6033]

✋🏼🇦🇺👍🏼

[@bootsnall8996]

2nd one was better.

[@demolitiondavedrillandblast]

Thanks, I upped the load just a little.

[@nbtmx1]

The witches hats were made by toyota