What are the technical difficulties in space mining?

The first is the space problem, how to transport a large number of mining equipment into space. The space shuttle plus booster rockets and fuel is only a few hundred tons, and the effective part that can really be launched is only a few dozen tons. The space shuttle runs in low orbit and will never reach the moon or other celestial bodies. The mass of the Apollo moon landing rocket finally sent to the moon was only about ten tons. But the weight of mining equipment alone is not less than dozens or even hundreds of tons, and it is only one piece of equipment. It is impossible for a mining base to have only one equipment. You are manufacturing in outer space, and the equipment and materials needed to build an aerospace industrial base are probably thousands or even tens of thousands of tons. How can tens of millions of tons of mineral materials return to the ground, but they can't be thrown to the earth like meteors? The ability of human spaceflight is far from the level of establishing space, industrial base or mining base.

Secondly, the energy problem, not rocket fuel, is the energy problem of machine operation in mining base. There is no air in outer space, and diesel gasoline is completely useless. Although nuclear energy and solar energy can be used, the power consumed by industrial machines is by no means what the solar panels they carry can bear, and our battery technology can not reach this level. Maybe every device must be disconnected. Liquidity will be greatly limited.

Secondly, there is the problem of automatic control. There can't be too many workers in space, and there must be many problems in both space training and space environment. Not suitable for most people. Therefore, it is best to automate and mechanize. However, the automation level of human beings today is not enough to build a large-scale aerospace industrial base.