by JohnDenver » Tue 12 Jul 2005, 07:18:05
$this->bbcode_second_pass_quote('kochevnik', 'Y')ou skipped the part in that report about 'total energy used' = 196,000 MHW
Most coal mines use ELECTRIC shovels.
Right. So what's the problem? According to gg3 and dmtu (who would know), those shovels are powered by generators driven by coal from the pit. Clearly peak oil isn't going to have any effect on that loop. The shovel loads the generator, and the generator powers the shovel. It's peak oil proof.
Of course now you will seek refuge in the lubricants and plastics, which probably constitute about .01% of the cost of the entire operation. "See! Coal mining uses 'a lot' of oil." (Make sure to use the word 'a lot' if you want to be good doomer.)
Arguing with you people is like playing whack-a-mole. First you say "coal mining uses a lot of oil". Then we find out that coal shovels run on electricity/coal, so you switch to the shovels themselves. "All that steel uses a lot of oil." Turns out, though, that the steel doesn't use much oil, and casting the steel doesn't use much oil either. Likewise for machining the steel (electric) and welding the steel (electric). Assembling the shovels doesn't take much oil either, because its done with electricity, and human hands fueled by food. So now you switch to the equipment which the steel was machined with. "Making those machines takes lots of oil." Naturally, we follow that one up, and it turns out those machines don't need any oil either. Finally you end up talking about "the big picture" and far-fetched, irrelevant crap like the fuel needed to drive people to the plant, and the plastic tips of their shoelaces. It's pathetic really.
Here's a better way to look at it. Father calculates that 40 million barrels of diesel are needed to mine and transport a years worth of coal. That is roughly equal to the output of one large coal liquefaction plant (100,000 barrels/day), or about half the output of a typical modern refinery (200,000 barrels/day)
Source(pdf).
So we build a coal liquefaction plant, and the problem is solved. All coal is now being mined and transported on coal power. You build another coal liquefaction plant to get all the coal people and train drivers to work, and make the lubricants, tires, plastics and shoelace tips, and we're done. The loop is complete and there's no oil in it.
Here's another way to look at it: How much oil is being used in applications which have nothing whatsoever to do with the mining/transport of coal? How about the oil being used by motorists idling in monster traffic jams in every city in the country twice a day? Is that energy being used in some way to get coal from the ground to the generator? I don't think so. So the answer is simple: Tax the crap out of the private motorist, but make coal and coal liquids investments exempt. Reallocate the energy to where it is truly needed. Problem solved. In a few years, you've got a fully functional, oil-independent, coal-based coal production machine. No oil required. It may not be enough to fuel the national automobile slum, but that's a good thing. What's important is that it's enough to fuel the coal machine itself, and keep the power on. As time progresses, nuclear can be brought on line to entirely replace coal in power generation, so that all the remaining coal can be liquefied or used as feedstock.
$this->bbcode_second_pass_quote('', 'Y')ou have the same problem as oil ... all the low hanging fruit has been picked. To mine the coal that's further down, greatly increases the cost of removing the overburden.
That's true, but when those costs become too great, the mining technique changes. The surface mine becomes an underground mine, and mining continues. There is no real economic/energy barrier to deep coal mines. Some mines were dug to great depths even in the pre-oil era.
$this->bbcode_second_pass_quote('', 'T')he energy use today will be a lot higher when you're trying to increase coal mining 200, 300, 400 percent.