Lewis Wade
Lewis Wade
air coal constantly created dust explosion fresh fuel grinding heat mines mining move needs potential source spark
In mining what you try and do is move fresh air to constantly dilute the methane gas. Methane is a potential fuel for an explosion in a mine. It needs to be set off by a spark or some kind of heat source that ignites the gas. Also, in coal mines you have coal dust created by grinding of the coal. There are other things. That coal dust is also potentially explosive.
rather
They're not going to tell. They'd rather retaliate.
tense
They may be related. We don't know that for sure. Things have been tense over there for a long time.
fall ground protecting realistic systems ways
Technically, that's a ways off. The realistic thing to do now is to harden the systems we do have, protecting them from a fall of ground or a fire.