On the German Wikipedia there is this list of symptoms:
Dermatologische Symptome:
1 Erythema (juckende Hautrötungen)
2 Purpura
3 Bullae (Blasen)
4 Geschwüre
5 Haarausfall (bei starken Dosen z.T. dauerhaft)
6 Nekrosen
7 sonstige Hautschäden
Gastrointestinale Symptome:
8 Übelkeit
9 Erbrechen
10 Diarrhoe (Durchfall)
11 Appetitlosigkeit
Hämatopoetische Symptome (Myelosuppression):
12 erhöhtes Infektionsrisiko aufgrund weniger weißer Blutkörperchen (Leukopenie)
13 verstärkte Blutungen aufgrund weniger Blutplättchen
14 Blutarmut aufgrund weniger roter Blutkörperchen
15 Arterielle Hypotonie
Neurologische Symptome:
16 Schwindel
17 Kopfschmerzen
18 Benommenheit
19 Störungen des Zentralnervensystems (Krampfanfälle, Tremor, Ataxie)
Sonstige Symptome:
20 Fieber
21 Müdigkeit
22 Unfruchtbarkeit
This list is as far as i can see not present on the English wiki. so i point out the Symptoms that are effected by the "could not die" factor.
1. Erythema
would not be effected by the "could not die" factor. Your miners will have this "sunburnlike" itchy spots.
2. Purpura
would not occour - has something to do with nekrotic blodpipes.
3. Bullae
would not be effected by the "could not die" factor. Your miners will be spamed with blisters.
4. Geschwüre (Ulcer)
would not occour - has something to do with nekrotic body tissue
5. Haarausfall (Hairloss)
would not be effected by the "could not die" factor. All your Miners are boldy.
6. Nekrosen
would not occour - Nekrosen are necrotic so... yeah... next!
7. Sonstige Hautschäden (other skinndamage)
Could or could not - this is some imagenary stuff you can desside for your self.
8. - 11
would not be effected by the "could not die" factor. Your miners will have no appetid, spraycheese for the pottyrun and cube tussis after lunch. And they will feel very bad in the stomach all the time.
12. - 15. is all about the blood
IF your miners bloodproduction is effected by the radiation, all of them will occour. Less blood, bloodings out of nose, ears, eyes, genitals... They are not directly related to dying cells so if the bloodproduction is effected they will mess up every dress of your miners. Also your miners get more sick because of less White bloodcells.
16. Schwindel (Dizziness)
would not be effected by the "could not die" factor. Your miners will most of the time not be able to walk a straight line.
17. Kopfschmerzen (Headeches)
would not be effected by the "could not die" factor. Your women miners will not be in the mood.
18. 19. Benommenheit (Numbness), Zentralestörungen (epilepsie and such things)
would not be effected by the "could not die" factor. Your miners will often feel out of place, sometimes one can fell into a coma at extreme.
20. Fieber (fever)
This one i am not sure... fever is helpfull to get dameged biological mass out of the system by boosting the immune system. So if bacteria and stuff in the bodys of your miners will not be immune against the Radiation - the immune system will start to collect thier dead bodys and let them go the way of everything what goes in. Like the Diarrea i think it would not be occour, but not everytime a bacteria is kicked out of the body a fever starts - tough call.
21. Müdigkeit (sleepeness)
would not be effected by the "could not die" factor. Your miners will be very sleepy all the time.
22. Unfruchtbarkeit (Infertility)
also not sure. The Spermium or the Eg is crafted fine. But the storage is than again influenced by the "is the body not dying or everything in it"... your choise - cloning is a good alternative.
So your miners will have a poor live in the radiated enviorment but they will live. I think it will be very tricky to come around some of that stuff (the blood everywhere for example).