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Old 04-19-2010, 04:54 PM
 
Location: East Snobb
229 posts, read 398,479 times
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I am looking for some information about the quarry off of Huebner that is just south of De Zavala and east of I-10. I know this is an active quarry, but do they do active blasting there? If they do, how often is it? I have Googled the you-know-what about it and can't come up with anything.
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Old 04-19-2010, 05:01 PM
 
420 posts, read 1,014,170 times
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call them and ask. but it is very likely they do it as needed.
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Old 04-19-2010, 05:44 PM
 
Location: Austin, TX via San Antonio, TX
6,147 posts, read 8,605,116 times
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I remember feeling (hearing) lots of blasts in the late afternoon (2-4) when I went to Clark. But I cannot be certain on the precise schedule.
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Old 04-19-2010, 07:17 PM
 
2,721 posts, read 3,411,919 times
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Default Probably,

Unless the quarry is near being closed, they are blasting periodically.
Depending on demand, a lot of holes are drilled in the limestone with rock drills, filled with explosive, connect it all together with an electrical grid, test for continuity, and then, look out !
It takes two months or so I would guess to get enough holes drilled
to an equal depth, depending on the size of the operation and how soon the huge front end loaders run out of shot rock (blasted) to feed the limestone crusher with.
I worked in this business for about two years here and the blast is really something to watch. Boulders flying way up into the air and a lot of dust.
This is about as specific a guess as I can make as far as how frequently
the blasting occurs.
Quote:
Originally Posted by HeyEng View Post
I am looking for some information about the quarry off of Huebner that is just south of De Zavala and east of I-10. I know this is an active quarry, but do they do active blasting there? If they do, how often is it? I have Googled the you-know-what about it and can't come up with anything.
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Old 04-19-2010, 07:34 PM
 
Location: SA/Pipe Creek
2,790 posts, read 5,171,185 times
Reputation: 1590
They did it in the 80s and 90s. Doesn't look like they are done yet. Active quarry = active blasting.
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Old 04-19-2010, 07:43 PM
 
420 posts, read 1,014,170 times
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Limestone is not that hard a rock. I doubt it takes more than a few of days to setup a blast pattern.
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Old 04-23-2010, 08:36 PM
 
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Default Blast patttern?

What in hell is a blast pattern ?
For shallow depths like a street or a pipeline , a short period will do.
Quote:
Originally Posted by RoamingWolves View Post
Limestone is not that hard a rock. I doubt it takes more than a few of days to setup a blast pattern.
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Old 04-25-2010, 09:31 PM
 
420 posts, read 1,014,170 times
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they put explosives in a pattern to create an efficient explosive wave that breaks the rock along certain lines to carve out what they want next.
YouTube - Quarry Blast - 01

If they just packed a hole full of explosives and hoped for the best you would have a situation like the exploding whale.

YouTube - exploding whale

not good.
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Old 04-26-2010, 07:00 PM
 
2,721 posts, read 3,411,919 times
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Default Full of beans-blast pattern,

You forget I've done this for a living. The whale video was great,Hilarious.
That is a nonsensical term. It does not exist. Though I have seen too much explosive, or else a lower density of rock, that caused rock fragments to travel all the way into a neighborhood one time. Oops.
Different explosive are used nowadays than when I did it. We used
one stick of dynamite per hole, lowered to the bottom by the electrical wires
that detonate the blasting cap which was inserted into the stick . A nine volt battery will set off one stick.
We then filled the 6 inch diameter hole to the top with
ammonium nitrate- Which, horribly, was the same explosive used in the Oklahoma Federal Building blast- Then tamp the rock dust with your boot over the explosives leaving the two wires exposed. Things were fairly primtive
back then. A guy would turn a loader bucket down get under it and
from two wires leading to the blast site connected to a plunger type of detonator (I sincerely think he was hoping for the best) down would go his hands on the handle.
It is merely done in a straight lines- that is all. Evenly spaced. I can also
remember one particular rock fragment, 25 ft. high- unfractured.


Quote:
Originally Posted by RoamingWolves View Post
they put explosives in a pattern to create an efficient explosive wave that breaks the rock along certain lines to carve out what they want next.

YouTube - Quarry Blast - 01

If they just packed a hole full of explosives and hoped for the best you would have a situation like the exploding whale.

YouTube - exploding whale

not good.
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Old 04-26-2010, 07:59 PM
 
Location: West Creek
1,720 posts, read 4,007,651 times
Reputation: 784
Quote:
Originally Posted by huckster View Post
You forget I've done this for a living. The whale video was great,Hilarious.
That is a nonsensical term. It does not exist. Though I have seen too much explosive, or else a lower density of rock, that caused rock fragments to travel all the way into a neighborhood one time. Oops.
Different explosive are used nowadays than when I did it. We used
one stick of dynamite per hole, lowered to the bottom by the electrical wires
that detonate the blasting cap which was inserted into the stick . A nine volt battery will set off one stick.
We then filled the 6 inch diameter hole to the top with
ammonium nitrate- Which, horribly, was the same explosive used in the Oklahoma Federal Building blast- Then tamp the rock dust with your boot over the explosives leaving the two wires exposed. Things were fairly primtive
back then. A guy would turn a loader bucket down get under it and
from two wires leading to the blast site connected to a plunger type of detonator (I sincerely think he was hoping for the best) down would go his hands on the handle.
It is merely done in a straight lines- that is all. Evenly spaced. I can also
remember one particular rock fragment, 25 ft. high- unfractured.

They use a liquid chemical that reacts with the nitrate and goes boom! but does not make a huge sound kinda sounds like a cap toy gun

but its all done by specialized blasting companies now. so you can rest assure that a 281/1604 accident wont happen again!
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