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Linkat
Posts: 8099
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Do you? Nearby my home, they are doing some blasting. There is a sign as I drive that says to Turn off Cell phones and two way radios. I was doing this, then realized is everyone else doing this? Why do I need to turn off my cell phone?
I have decided to be a rebel and leave my phone on – after all who is going to know?
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ehBeth
Posts: 43647
Location: I can see the Danforth from here
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It can interfere with blasting signals. Depends on the technology.
Not a risk I'd be willing to take with other people's lives.
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mysteryman
Posts: 5706
Location: Ky.
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If radio signals are being used to set off the blast, there is a chance, albeit a very remote chance, that your cell phone is on the same frequency as that being used to do the blasting.
If that is the case, using your phone could set off an explosion.
If that happens before those doing the blasting are ready, if they arent clear of the area, if they are still setting their charges, etc. you could kill or seriously injure them.
Thats why they ask you to turn your phone and two way radios off.
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kickycan
Posts: 20781
Location: New York, NY
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Speaking of this, I always leave my cell phone on when I'm flying, even though they say I should turn it off. My cell phone is a piece of shit, and whenever I turn it off, it is a fifty-fifty shot whether I can get the f*cking thing to turn back on again.
Am I actually endangering lives? Somehow I doubt it.
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farmerman
Posts: 17342
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very little blasting is radio det. You lose whatever control you have and the risks are , while not great, they are there.
The real reason is that wires used, if not properly"shunted" before making an open circuit , can act like an antenna and can set off a blasting cap.
Most dets use a wire and PETN system, its the most safe.
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Linkat
Posts: 8099
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I was just wondering as I asked around and no one bothers to shut off their cell phones. So I figured my additional one isn't going to do anything different any how.
And my phone is like kickys. I have an old one and it turns off by itself all the time so most likely it is already off.
Do you have to be actually using it to cause a problem or is it simply being on that is the issue?
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roger
Posts: 14027
Location: Farmington, NM, USA
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In perforating casing in an oil well, they use what farmerman describes. I am told by a wireline hand that the detonators now use a resistor that prevents a radio signal from setting it off.
Kicky, if those cell phones interfered with anything on an aircraft, they wouldn't let you bring them aboard. They just want you to use their phones. You know, the ones that accept credit cards.
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kickycan
Posts: 20781
Location: New York, NY
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Ah, thank you Roger! That makes sense, and I will continue to do as I do regarding this situation. I'll let all of you know if I ever accidentally take down a 747 with my Nokia.
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Bi-Polar Bear
Posts: 13764
Location: Raleigh NC
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your phone has probably already given you brain cancer so what have you got to lose? Might as well take a few other people to hell with you. 
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Setanta
Posts: 44369
Location: On a rocket to the fourth dimension
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Oh jeeze . . . for the few seconds it takes to drive through the "no cell phone" area, Warren Buffet might call to offer me millions of dollars for no particular reason, but i'd miss the call!
I NEED my cell phone ! ! !
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Posted: Mon Apr 07, 2008 10:01 am 
