"I was thinking that if they don't want to send in a volunteer scout, then they should send in a robot?"
I think there is electrical ignition issues with the robot idea.
I still fail to see that a properly kitted out rescuer would cause another explosion. I guess the coal could still be burning being that they are pumping air into the mine and a slow build up of escaping methane could cause another explosion. There was some smoke commming from the vent but not sure of the other vents.
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