Michigan Escapee
ArboristSite Operative
So that's why I see those guys cutting the same wood over again. No they dont look like fun. An unpredictable pain in the ass. Can't you guys blow some of those up? I mean theres no value in them when they slab out like that right? Or is that not practical?
In rare circumstances, you can use explosives to "cut" the tree, like this one.
But in practical terms, there's no fracture plane like in rock, metal, brick, etc. So, you're pounding an amorphous material, full of water of course, lignin, other springy stuff, and that's gonna take LOTS of explosives. Unless you can use something for cutting, say a sheet of copper, or something else that will work as an explosive formed perpetrator to cut the material.
https://en.wikipedia.org/wiki/Explosively_formed_penetrator
All of this requires planning, some idea what the density and composition of the material is is, and about 4-5 explosive techs messing around for maybe 3-4 hours, and each billing out at about $150-450 an hour. That's for one big tree like in the picture.
Smaller trees, say something under 14-16 inches, you can probably use a more or less standard I beam cut charge used for building demolition.
Smaller than 10 inches, you could probably just do about 5 loops of det cord, and call it good. But, all of em are most likely going to fall in a random direction unless you set up the cut planes, and delays, as if you were using an actual chainsaw. lol!
So how many saw monkeys can you hire for about $150 an hour, compared to a bunch of explosives techs? LOTS and LOTS!
Also the big problem of using explosives is, you generate loads of noise, you have to zone off a whole area so someone doesn't get fragged, the wildlife is going to be made nuts in short order, and that means the Sierra Club, and the other duck squeezers will be up your ass in a hurry. This also assumes the local government isn't going to freak out over the assortment of risks associated.
If you've got an insanely huge forest fire, and need to create a firebreak on short notice, then they'll let people use explosives charges, or some other crazy thing. http://www.washingtontimes.com/news/2014/aug/9/3-wildfires-spreading-in-central-washington-state/
Because in that circumstance, you're not destroying good wood, or creating a long term hazard. The whole region is gonna burn to the ground anyway.