BLOCK CAVING | METAL mining| stoping method | mining mafia
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- เผยแพร่เมื่อ 6 ก.ย. 2024
- #blockcaving #metalmining #stoping
In this video i've discussed about the block caving method of underground metal mining. below you'll get the written note of this topic.
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Block caving:
It is an underground mining technique used to mine large massive ore body.
Development:
- Access to the ore body with incline and shaft (drives by jumbos and rock bolts for safety)
- After gaining access a series of parallel extraction drive are developed from one side of the ore body to the other
- Between the extraction drive drawbells are developed.
- Undercut level is developed at same time as the extraction drives, rings of drill holes are charged and fired from one side of the ore body to the other.
- The drawbells are drilled and blast to become a series of funnels that will feed the broken ore to a draw-point.
- This process breaks the layer of rock across the bottom of the block ore and leaves a large unsupported area which starts fracturing and caving under its own weight.
- The ore body is starts to cave once the undercut is complete and ore is remove from the drawbells creating a void.
Once the development is complete and the ore body has been undercut the mining process is relatively simple with continuous fracturing and breaking of the rocks to smaller rocks for the extraction without any further blasting
Low profile LHD collect ore from draw point and dump it in the ore pass or underground crusher.
Applicability:
-Large ore body
-Low grade ore body
-Steep gradient more than 45 deg.
-Weak ore body (cave under its own weight)
-Weak wall rock
-Surface should be allowed to subside
Development carried out for:
- Extraction level development:
o Drilling done by Jumbo drill
o ANFO charging
o Blasting
o Scoop-tram Mucking and dump to ore pass
o Support : fiber rich feed shotcrete spray and wire-mesh anchor
- Undercut development:
o Making connection to apex level and ore block from undercut level
o Drilling long hole by long-hole drill from undercut connecting apex level , block to undercut level
o Charging
o Blasting perform to enable connection between the level and ore body
- Drawbell development:
o Connecting undercut & extraction level
o Connection made between two extraction level.
o Support :
Cable bolt, steel set sprayed with fiber reinforced shotcrete.
Wire mesh of walls and sprayed with fiber reinforced shotcrete
Drawpoint intersection bolts at junction of extraction level and drawpoint.
o Drilling of 30” slot raise by In-The-Hole drill(ITH drill) up-to undercut level.
o Long hole drill for drilling long-holes drawbells.
o Charging on long holes
o Blasting
o Scoop-tram mucking from both side of drawbell
- Further undercut and drawbells are developed under the ore body
- Ore is dumped down ore pass to haulage level and transported to underground crusher then to surface.
Advantages:
- The accident rate is fairly low
- After the caving starts a high rate of production is possible
- Control of ventilation is less compare to others methods of mining
- Mining cost is low
Disadvantages:
- Preparation of stope is complicated and time consuming
- The ore is diluted with waste and there is some loss of ore.
- Caving is difficult to control
- No scope of selective mining of high and low grade ore
- Excessive dilution if caving is uncontrolled
- Capital expense is large
- There must be careful supervision of ore drawing
- Mechanization is possible only to a limited extent
- Secondary blasting is required on a large scale.
FAIR-USE COPYRIGHT DISCLAIMER:
==========================
*Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, commenting, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non- profit, educational or personal use tips the balance in favour of fair use
- this video has no negative impact on the original works.
-this video is also for teaching purposes.
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• BLOCK CAVING | METAL m...
I really enjoyed n watched all the videos...
Specially Thanks for animated video sir🙂
Though I am not from this branch but surely can say that mining branch ke student dekhenge they will get a complete information about the solution they are looking for😊🤗
And I really liked the editing 👏do come up with more ❤
Hope so
Yes we got it 😅👍
This is a very developing field, and students from this branch shall surely enjoy and gain alot from this👌
I love to learn something new and you just served the whole new world in front of me... its awesome...
Very nice
Very good information thnks sir👌👍
Useful information shared sir 👍Thank you 👍
V good information
Wowwwww...Super video.?Very helpful video.....
Very nice information...
thank you sir. your videos are awesome with animation.
You just explained wow❤️, all the things in practical way...n clear
Very nice information, very well explained, thnx for sharing, complete info for students
This video Help ma a lot sir thnx❤
Very informative video
Informative video
Sir you clear my concept thankyou
Good information.......,
This is incredible. Didnt have much Idea regarding this. But u explained well.
Woww very well explained sir thnks for sharing this information
This is something new for me... And i find this really intersting
Excellent video 👍❤️
Nice information
great video quality
Awesome 👍
Bhai pura samaj me ata hai 🤩
Bahut hee ache tareeke se aapne samjhaya..... keep it up sir
Very well explained
Very informative
Great explanations sir..
Regard from Indonesian Mining Student
Thanks and welcome
Very useful n nicely explained
congratulation #mining_mafia for 1k+ subscriber
Thank you for your kindness and warm wishes. Thank you very much for your support and encouragement.
Just one word... awesome ❤️
Thanks a lot 😊
useful information
Well explained
Good work sir
Interesting information and very well explained
Thanks for sharing
Waah aman 🔥👌nice
Amazing
Nice video
Very good information..really good
Nice video 👍
Very good to know 😀
mast
Very nice and practical explanation
A
Very Gd dost
What a presentation...good work
Nice bro
Very informative 👍👌
New content for me . Well done 👍
Is the stoping development method for cut and fill and block caving method is same also?
You did good job. Very well explained. 👍
Great content sir!
Sir lob
Great content bro ..keep uploading videos
Amazing video and well explained
Big fan sir.. Shoutout ❤️
Sir can we get videos of mine ventilation
Very informative video 👍
Very well explained 👍
Just on word
Awesome??
Best presentation dear,
What software are you using for animation?
MS office ppt
Hm
@Sunil Kumar you can't do both at one time
Very well explained
Very nice
Good video