Neil Ringdahl
@NeilRingdahl
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Mining Nut | Engineer | Executive | Investor | Advisor *My comments & opinions here are my own. Tweets are not advice & RT's not endorsement.
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Joined April 2019
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Super proud of my daughter. 5th generation in mining, a graduate mining engineer with Anglo, has been grinding it all year getting face-time experience at Kloof of all places - one of the deepest gold mines in the world. Its been super tough 4 her but she is hanging in there.❤️
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1) Thread: From Drilling to Open Pit Optimization For Dummies.
Imagine you have project and hire a truly great geologist who has drilled some fantastic looking sections based on a small surface anomaly he found from a surface geochem sampling program.
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Super proud of my daughter embarking on her 3yr mining engineering graduate development program with a large, multinational Co. Following in the footsteps of her dad, grandfather, great-grandfather and great, great grandfather.
Mining in the blood.❤️
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Too good not to repost: The world's biggest open pit blast. Iron Ore. Australia. 11 million tonnes 6,410 blast holes, each with its own detonator, 51 Hectares. A couple of blown out shots in the middle that will make things difficult for the diggers. 😃
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1/23
#Economics
of
#OpenPit
#Mining
& its impact on a Mining Co's success. This brilliant pic of Letseng diamond mine in Lesotho shows the results of sensible & good strategic & tactical mine
#planning
. Take a careful look and then compare this pic to the next one of
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Here's a little vid I made of a 300t truck & then Grasberg Mine to give you an idea of the true scale of large open pit operations. Hope you enjoy🙂
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Blasting the right way: A great oldie. The part which flashes is called the pre-split, the holes are not stemmed and blasted together, blowing out dust, but creating a nice, clean "split" in the highwall which is easy to dress, very safe & best geotech practice in OP blasting.
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With dad at the mine entrance. The man who inspired me into mining. 😃
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1/9Thread: WHAT TO LOOK FOR ON YOUR NEXT SITE VISIT to any open pit mine: Floor conditions & big rocks. If the floors r not smooth, level & clean -like tabletop- then the trucks will be less productive &mining cost higher than average. The Big rocks are the 1st sign of of trouble
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My daughter graduated today B Eng. Mining. Super proud, but had to watch from 14k km away. ❤️❤️😭💕
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The DANGERS of spreadsheet mining. A🧵
Some of you may have been following the $AUN debacle, a good e.g. when the Lassonde curve goes south. 😬
I will discuss a few important technical flaws in the Aurcana investment thesis. /1
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Ever wondered how to flip a 150t dump truck back onto its wheels again? Here is how.
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Good tactical & strategic planning along with execution is more important than grade. A 🧵
Our case study today is Pure Gold $PGM
& how it turned into Pure ..💩
1st, some theory you'll know if you have been following me 4 a while:
/1
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Everything you use,
eat with,
even live in, if it has not been grown, has been mined.
Thank a miner today for everything you have. 😃
Thank a farmer today for what you have eaten.🙏
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#Mining
Who Owns What graphic. Still worth sharing even though its a couple of yrs old now. I had to stitch 4 images together to get this right; hopefully everything is legible.
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A pre-split is a row blasted all together at the back of a blast before the main sequence starts.The holes are lightly charged & left open (no stemming) so that the reduced force creates a split/crack preventing the force of the main blast from subsequently damaging the high wall
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A sight no miner wants to see. 50 x 250t off-highway trucks parked up at Las Bambas in Peru. Millions of $ local economic generation capacity wasted because of a few greedy people and a weak government, paralyzed by fear. The biggest risk to every mining Company worldwide.
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#Mining
with Electric machines: A modern miracle to save the environment or a pipe dream? 🧵
I'll discuss both open pit & underground apps.
For 60yrs, engineers have been innovating electric mining machines b/c they're cheaper. An electric dragline moves 60t each swing.😳1/
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Ooooh boy.....look who is talking about gold....👇 😬
Anyone know what he said?
Hopefully he said its gonna crash. 😁
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Have a great weekend everyone.
Don't get too bogged down with the worries of the world.
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Its pretty cool when you drill 20m of high grade copper in a zinc mine - This happened to us yesterday. Looks like we might have found the heat source and possibly something very big. Being private is cool b/c announcing something like this can't be blamed as pumping the SP. Will
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Stripping 180 tonnes, one scoop at a time. For comparison, that bucket is about the size of a 3,000' of house (in Yorkville 😉). 🙂
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Winter + Mining = Most Expensive Christmas Tree Ever! 😆
Wishing you all a very merry Christmas & may your new year be filled with interesting posts about Mining & Mining Co's, what to do and whatnot to do. 😉💪
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Chairlifts are a very efficient way to get personnel underground safely. They're also quite fun to ride.
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These kind of pit slope failure tragedies are totally avoidable with even a basic amount of slope monitoring. You can't stop something like this from happening but with regular measurement at the same time each day you can predict them more very precisely to within hours & evac.
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Here is an gold open pit I designed some yrs ago in Ghana. We intentionally changed the pit limit to save that big tree in the background, even though it left behind economic ore. It might not look so big but it was over 3.5m in diameter one of the few giants still left.
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Our team are replacing these 24 inch pipes with a new 48 inch column so have come up with this ingenious method of floating out the old ones through the 4km mine drainage tunnel.😂 Mining is such fun.😃
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Block Caving. The lowest cost, highest production mining method. Only works for large orebodies. Rule of 👍 cost &$16-25/t. Takes a while (years) to get to full production. This is Chuquicamata's block cave layout to produce 140,000 tonnes per day. 😃
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Graduate Mining Engineers: There is a skill to mining through bad ground; desktop blotter jotters will never know. You only learn stuff like this by DOING it yourself underground, so DONT SKIMP in your first 5 yrs on the job. Spend time UG, it will save your job later as a GM/COO
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Wishing everyone a nice weekend. Just don't forget about mine. 😉
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Bet a lot of you have not heard about metal accounting👇 in mining, but its real and its a very important thing to look at when evaluating any project.
Often these issues are not shown in NI43-101 reports. What you need to look for is if all of these factors are included in the
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Wishing you all a great weekend.
Remember that life does not have to be so complicated. This is our setup when prospecting in Africa.
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1/2 Dragline: What its like being in the operator's cab swinging and dumping payloads of 200 tonnes, hundreds of meters away.
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A career in
#mining
#engineering
or
#geology
will likely take you to fantastic places you never knew existed. Its a great job that is never the same. Every. Single. Day.
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Open pit mining basics from a simple picture:
This 👇 hydraulic shovel is "double-sided" loading at Anglo Platinum's Zwartfontein South Pit. No big surprise, this machine is 100% electric & the photo was taken in 2002, long before the recent climate hysteria became a thing.
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Spot my daughter in this 3rd year mining engineering student tour. They're standing in a coal dragline bucket.🙂
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Absolutely totally crushed...heartbroken to have buried our little Pikanin today, after a year-long battle with cancer. He was a few months over 9yrs. What heart this little dude had. What a fighter.
💔💔💔😭😭😭😭
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The anatomy of a 5:15pm underground mine planning meeting, after 3 solid hours of detailed stope scrutiny. 😅🤔😂
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Here is a pretty cool video showing TROLLEY ASSIST; developed on one of the lowest grade open pit copper mines in the world (Palaborwa, RSA) the system has been in use in open pit mines for more than 40yrs. Works well if your pit ramp is fixed for >4yrs.
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Water, the underground miner´s enemy & a BIG challenge. This is a development heading we are currently mining. Trying to anyway.😆 When you place explosives in the holes they just gets pushed out again. Luckily not too much pressure here, yet.
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Smooth blasting: One way to reduce development cost by 30%. We are now able to advance this end with good barring & 0 mesh support. 🙂
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Working in the mining industry is actually a lot of fun. Everyday is different and brings new challenges. It also pays really well, especially if you have half a clue as to what you are doing. You'd be surprised how many folks don't. 😏
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Wishing you all a very blessed, happy and productive 2023.
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Here is a very nice video of a rail-bound pneumatic loader in operation, loading a 1.5t rail car. Actually a very cost-effective method of cleaning development albeit a little slower than trackless. No tyres, no diesel, no mechanics. VERY little downtime.
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I recently had the opportunity to visit a
#zinc
smelter. Will be doing a thread series on how it works soon. 👌
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Exploring the old upper levels to find where all the water is coming from.
Think we might have found Roatan Island, or the Great Barrier Reef! 😄
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I watched this three times, so true.
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A rare moment of quiet & rest at a sinking shaft. 😃You wouldn't normally have this much space, but this is a during a shaft station breakaway. Notice the cactus grab in temp storage below the stage.
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It really nice when you find a 17% copper sample inside an operating zinc mine. 🙂 No long lead times to development, just a frantic session of mine development, infill drilling, met. test work, ordering of reagents. Will let you know how things go later this month.
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Exploration drilling is important to replace what is mined. How much did the Co you invest in drill last year? We averaged 30,000m/yr over 5yrs & have been able to replace + extend Life of Mine to 10+yrs, mining 800ktpy. Here is what 1,358,818m of drilling over 74yrs looks like😱
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Just did a mining cost compare May - Oct: Reagents up 70% Shipping costs up 100%, rebar up 60%, explosives up 60%. 🙄🙄
Probably nothing.
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Despite a huge commodity rebound, Mr. Market over the last 2-3yrs has finally has realized most JnrMinCo's are not worth the paper printed. No one is buying. The glory days of pump stocks, Stan Barthi's et al are apparently over, along with any genuine mine maker's ability to
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The worlds biggest blast: 11 million tonnes. 6,410 detonators. 51 Hectares.
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1/18 MINING COST ASSUMPTIONS r subjective & r based on many variables, e.g:
Currency, country, mining Co, hrs worked, % local materials, tax, import duties, power type & cost, productivity levels, mining method, depth, geotech, rock hardness, size of resource etc. etc. So how...
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My great grandfather started out on the Welsh coal mines at age 10. Grandad on dad's side was a exploration driller. Grandad on mom's side was a mine capt. Dad has 50yrs in geology & building mines, I got 27yrs as Bsc. Eng Mining & my daughter finishes B. Eng. mining next month😃
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Here is a picture of what drilling into pure pyrite looks like. 🙂
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$FIL Filo an example How to Calculate CuEq & Read Drill hole Results. 🧵
Few doubt the size & magnificence of this modern-day, marvel discovery. Reading this slide, we see 11.5% CuEq Wow, amazing! But what is it exactly & is it really as magnificent as we are lead to believe? 1/
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1/9 BLOCK MODELLING: Imagine you have a gold ore body that looks like this in section after your geologist has done his interpretation. To keep things simple, let's assume you are very promotional QP who is comfortable with just two drill holes to build your resource 😏
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Here's a look at conditions underground at Bisie tine mine in the DRC: Great quality support, good survey control, roadways look a bit rough & could do with more grading & less water, otherwise all appears to be top notch.
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Continuing our "What to look for on your next site visit", a LOT of info can be gleaned from presentation pics and GE. This pit that is probably operating at 30% higher cost than it could be. Again, easy to point out the problems, hands-on, unrelenting management required to fix.
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This is a big deal: MMG put Las Bambas on Care & Maintenance effective 1st Feb. This mine produces 290kt copper/yr, effectively 1.3% of the global production.
Desde que inició operaciones, en 2016,
#LasBambas
ha tenido que lidiar con más de 400 días de bloqueos de vías. Más de 6.000 empleos, directos e indirectos, están en peligro.
@MineraLasBambas
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Mining Pushbacks 101: A great way to delay stripping (capital) costs for better cashflow over an open pit life of mine. Its better to have an additional ramp on the right hand highwall in this pic below to access the bottom; waste stripping is accessed by its own separate ramp.
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"Barring" to make safe in an underground
#Mine
looks like this. It's quite hard work & if the ground conditions are bad it can take a whole shift to complete. Normally though, it takes 15 minutes to an hour.
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These machines work well in any kind of soft rock. In the first shot, note the excessive use of stone dust (white on walls) to minimize risk from coal dust explosions.
Have you ever wondered how coal is mined underground? A machine called a Continous Miner cuts the coal.
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A miner's commute. Down a vertical shaft 2400ft underground, followed by the 2km train ride. Can you spot the non miner in the group? 😄
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Now here's a young man who should become a mining engineer! 😃
17-year-old Ghanaian Teenager, Solomon Atimbiri taught himself Robotic Engineering, and made a toy excavator using scrap materials.
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EVERYTHING you live in, use or need, HAS BEEN MINED or grown. 🤔🙂
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This type of "in-stope" escalator was widely used in the Cornish tin mines 100yrs ago for transporting men & material in conjunction with a steam-powered drive system up 18 foot vertical steps.
See video for how it works. 😬😅 Hairy, but effective.
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If you are interested in learning more about pit slopes and slope failures in open pit mining, here is an excellent place to start. 👇🙂
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A little bit embarrassing but today I just sold the last shares I had in Sandstorm. Awful, awful stock. Here is a not very proud list of my closed positions. Still 63% (I believe) is a little bit higher than the banks. 🤣🙄 I will circulate a list of open positions I have soon.
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A very nice summary of the copper producers. 👇😃
Heads up everyone: Cash costs are going up on all mines, everywhere.
Implies:
Total costs are going to be up even higher. 😬
One of the best ways to learn about the Copper Industry is by studying the Top 10 Global Producers.
I read each of the Top 10
#Copper
Producer Q2 2023 reports so you don't have to.
Here's a thread on the most important data and themes from the world's largest players ... 🧵
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Very pleased to be taking delivery of our first new electric truck this year to meet our
#ClimateAction
targets. 😉
Remember, always ask your VP Sustainability what they can do to help you. 😏
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They did it! In less than one week our team stripped down, cut up, transported re-welded & rebuilt this scoop underground in less than 7 days without any external assistance. Its loading high grade ore as we speak. Super proud of the guys. Well done!! 💪 Fuerza Hondureña. 🙏👏🆙
1/3 So you may be interested in that scoop I posted arriving at the mine on the weekend. The team have been stripping it down & lowering in pieces 850m UG and then transporting it 1.5km to the workshop position in the mine. Photos from the past couple of days.
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I don't know who this guy is or who he's talking to but he sure do make a lot of sense.
Got Copper? Got Zinc? Got Antimony? Got Gold? 🙂
You can’t make electric vehicles without mining. Lots of common sense here…
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