[Geology2] Coal Mining With High Dipping Seam

Dear All,

I have some question for all members about Coal Mining:

1. how techniques to explotation coal with a high dip (60-70 degrees) with a thickness more than 8 meters?
2. Is it possible that would be economical to use?
3. How does mining auger mining techniques? How about costly?
4. What there are other mines that apply to the high dip coal seam?

Many thanks,
ilham

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