This way you can put more than one train on the same line. You have to put the one direction trafficlights (that you get by putting a trafficlight on the track and than  clicking on it one or two times; the lights will change than in the right direction) on the track every now and than, i.e. after 5 blocks every time, otherwise the trains will wait at the station untill the train that movesin front of itself arrives at the next station. So if you do not make those trafficlights every 5 blocks your trains will be waiting more than make money!
After you have built the starions at the Mines and at the Powerstation you have to connect the station at the Power station to the first station of the row of mines. Now you have to get a train on the track, so you have to build a depot. This can not be done the normal way because the trains will go in the wrong direction than, so you have to do it like this way:

If the trains have to get a service they will move of the main track onto the depot track and move into the depot. If they have had the service they will move 180 degrees around onto the maintrack again, because the oneway signal tells the train not to move back. Now, it looks something like this:

This type of station actually works pretty well. (remind: do not make the stations on the main track but on a second track) It is very easy to build, and small , so it is cheaper than other methods. But you can not put to many trains on this type, because than you will get an overload situation and very many trains will be standing still, waiting at your station and tracks. This happens when you have i.e. 5 Mines in a row, and you can not get all the produced stuff away. There are a few solutions to overload, with I explain on the next page