Write the applicability conditions of horizon mining system.
[3 marks]Discuss the problems in mining of thin coal seams?
[4 marks]What do you mean by powered supports? Explain its purposes. Also write the factors affecting the selection of powered supports system.
[7 marks]What are the factors affecting the division of a seam into slices?
[3 marks]What do you mean by slice mining? Also explain the order of slicing in detail with neat sketch.
[4 marks]Explain horizon mining with its features. State its advantages and disadvantages.
[7 marks]Describe the types of machineries are used in thin seam extraction.
[7 marks]Discuss the principle of action of roof bolts.
[3 marks]Discuss the factors affecting the planning of distance between Horizons in details.
[4 marks]What is horizontal slicing method? Discuss horizontal slicing in ascending order with stowing with neat sketch.
[7 marks]Write the applicability conditions of inclined slicing with caving in descending order.
[3 marks]How optimum distance between horizons and crosscuts can be determined? Explain briefly.
[4 marks]Describe the methods of establishing linkage between bore holes in underground coal gasification.
[7 marks]Write a short note on sublevel caving.
[3 marks]How breaking down of coal is done in hydraulic mining? Explain briefly.
[4 marks]What are the main components of powered supports system? Explain Shield support with neat sketch.
[7 marks]How face development is done in thin seam mining method?
[3 marks]Write the advantages and disadvantages of underground coal gasification?
[4 marks]Describe the methods or ways to transport the broken coal in hydraulic mining.
[7 marks]What do you understand by radioactive minerals? Name the methods of mining used for radioactive minerals.
[3 marks]Discuss the advantages and disadvantages of hydraulic mining of coal.
[4 marks]Write the conditions suitable for underground gasification of coal. Also discuss the constituent processes of underground coal gasification.
[7 marks]Write a short note on ore mining by leaching.
[3 marks]Explain principle of underground coal gasification with schematic diagram of UCG system.
[4 marks]Explain deep -sea mining for manganese nodules.
[7 marks]