The wind turbines are already at the end of their lifespan and they knew RWE had the license to expand the mine there when the wind turbines where build.

Of course it's economical for RWE, they are not building a new mine. Just continuing their mining operation there for another 7 years.

"We live our life one quarter ~~mile~~ at a time" - RWE probably

Most likely they have no intention of stopping coal production and will just move the deadline again in 2030 and no one will do anything about it.

I'm guessing their bracing for winter without Russian oil. Which will hopefully be transitory, but also sort of delays the inevitable. If they can't survive a winter without fossil fuels they need to figure it out quick.

I suspect that they have no intention of phasing out coal, or there are certain unrealistic requirements that have to be met before the "agreement" to end coal is enforced. It's just pageantry, Germany has no intention of ending coal dependence.

This expansion is the last one although actually many more in the next decades were already approved and contracted, which got renegotiated with the energy companies. But of course this was already mispresented earlier this year when everyone reported on Germany destroying the village of Lützerath for their newly started coal digging when it was actually the last one (with half a dozen more similiar small villages originally scheduled for destruction more than a decade ago). But lobbyists pay to push lies and publications love the clicks for the popular outrage about evil Germans. Who cares for facts, anyway...

Those wind power plants were originally build with the knowledge that they have to be disassembeled in less than a decade again. Also those models proved to be very problematic and the company building them went out of business after only 4 years (since then there was only some auxiliary technical support from other companies).

Counter question: How economical is it to stop digging up coal today when the phase-out is 7 years away. They can either increase the pit or dig deeper. The latter is not only more expensive but also more damaging (pumping groundwater away from the hole etc.).

PS: A decade is also the usual life time of a wind power plant nowadays... After that time the gear boxes and blades need to be replaced and the foundation needs to be checked because of constant micro vibrations... In theory the installation itself could run up to 30 years but the technical development is still moving ahead so fast that replacing the whole thing with a newer and more efficient (also often bigger) model usually makes more sense than replacing parts to keep them running. So for now wind turbines are rather short-lived as their replacements see constant substantial improvements.