3D graphics

[Bamps21]

If you have a query about the ore body, screen shot the particular slide on the graphic and I will try to help

[Bamps21]

Question from Hydrogen querying the voids within the weaker ore.
I put this down to ecomical drilling or lack of drilling.
We have 420m of cover and drilling at an angle through this extends to roughly 500m multiply by 200 drills = 100,000 m of drilling in waste.
It’s more prudent to stick one drill through an area if it strikes 0.5g/t then don’t go back there yet.
If it strikes 3G/t then stick more drills in.

From these 2 slides there is a lot of potential to fill in these gaps of knowledge to fan drill it from lower down.
I will show this on the next post

[Bamps21]

You can see from this slide they will not be drilling through waste and the drill runs are much shorter.
Much much cheaper and less challenging.
Drilling through hard rock no sleeves required as from the surface with their pre collars

[Bamps21]

Why is the base rounded at the base?

This is not actually the case.
Callum explained this on one of his latest interviews
When the aero survey goes across the signals resonate of the sides of the orebody before being retrieved so not actually getting to the bottom peripheries.
The strength of the signal gets weaker as the depth increases and this curve shape forms on the modelling.
Here at Havieron it’s still going down not curved

[strudel]

Newcrest's June 22 quarterly report had some good pictures from BruceJack showing what in-fill drilling looks like from deep underground. They go a lot further away / deeper from the active face(s) and also drill at angles that go back up into the ore body, not just downwards.

Left hand side of this image:

Detail view of one set of in-fill drilling:

[Bamps21]

Hi Strudel
This is a more detailed section of what to expect with fan drilling.
Brucejack is far ahead of Havieron

[strudel]

What a great picture of all their presumably planned, in-fill drilling. It looks like a gathering of hairy broddachs from far and near.

https://www.google.com/search?q=scottis ... UoHHKA6OxM

[Bamps21]

I blown this slide up to highlight the levels of the Eastern breccia but also the new “Link” zone.

This is looking from the NE, on the left you can see the bottom of the SE crescent, the bottom of the purple is at 1150m of ore.
Newcrest have said the high grade is tailing off there.
If it is tailing off where are the sulphides intruding from?
They are coming from below somewhere
I have a couple of theories:-
There hasn’t been a lot of drilling down at these depths it’s on the drillers limits, there’s 2 options they either haven’t hit it yet or the sulphides have come up from another zone.
In my opinion they’re coming at an angle from the Eastern Breccia further to the east.

The Link zone may give us a clue to this later when more drills are done.
For now that link zone is showing moderate grades I’m expecting these to increase.
Only 2 drills so far, they look fairly consistent grades here as in the EB. When grades are consistent and not highly variable like the crescent then Kriging boundaries can be extended with estimates within easier to average.
Later drills might increase or decrease these averages, maybe locating where the sulphides are.
The EB variables from the first few drills were also consistent and therefore less drills are needed to form a resource. Recent drills are highlighting high crescent type grades within the EB.

The level differences between the SE crescent and the EB are important.
The purple area is at 1150m , weaker ore does continue downwards but that may increase in time. This should go to 1300m .
The Decline design needs to go to this lower level and then it will go straight towards the EB.

2 options they could bulk cave the 400m above this level or they may wish to go slightly deeper.
You have to think of bulk cave depths there’s limits on these, trials of higher depths are taking place elsewhere but 750 to 800m are probably the limits.
For now I’m suggesting 400m is a good height for the EB bulk cave and then a further cave lower down later.

An underground crusher could be installed just below the 1300m level for the SE and EB mines

[Bamps21]

The latest Decline design is taking it down to the 1150m level you can see it needs to lower to catch more of the SE crescent and the EB.
The current decline length is 2,600m so at 400m depth that’s a gradient of 1:6.5.
Using this gradient down to 1300m of ore would give Decline length of 8,550m from the top of the ore

[Bamps21]

on this slide you can see the spirals in the Decline but when expanded all the interconnected tunnels and raises come into view.
This is where I’m saying after the first spiral more faces of the decline come into play and possible exploration.
I’m thinking March/April get to ore body,
6 months to install production system, start ROM stockpile before Xmas . A few months to get enough ore for transport to Telfer
All in my own opinion of course based on 8m per day from now.

[Bamps21]

this is something I haven’t had going through my 3D mind
The spirals following the Dyke downwards with the vent/escape raises to the east of the Dyke.
Must be a good reason for that maybe to stop water following the spiral

[Bamps21]

a complicated stunning view of the decline and stope accesses.
Great stuff

[Bamps21]

Forgot to mention the Northern corridor stopes at high level.
Showing the intention to get at all the high grade stuff as close as they can to the top of the ore body for less transport

[strudel]

Looks like we have the ultimate slinky, which has, when the spiral continues deeper to get to areas we currently describe as "open at depth", every chance to be twice as long as the one shown.

[Bamps21]

Here we have 2 images
A computer generated graphic looking from the Northwest from the last week.

This second one is a Bamps scribble out of my head from what I thought was happening , from about 18 months ago maybe more.
The lines I drew on were the direction of flow of the intrusions from the Eastern Breccia into the Northern corridor.
I omitted the Dyke for clarity and the sulphides, these 2 would not have been around when the intrusions were happening. The sulphides were probably the last intrusion and the Dyke even later.

Looks like the published info is just catching up with me

[Bamps21]

What a stunning image looking up from below

[Bamps21]

That purple line right at the top is the first high grade ore to come out.
Had 005 is behind this, some weaker ores are around the peripheral.
Look lower down bigger zones of red and purple in zone 3 of the Western front, this has been the subject of extensive drilling on the inside of it.

[Bamps21]

Best to expand those 2 images, absolutely stunning

[Bamps21]

Best to expand this image, shows very clearly the intention to stope the centre and its right at the top.
Would be a great place to fan drill downwards

[zoros]

Bamps - I think you've been taking piccies of stained glass windows in your spare time!
Z