Home/Volume-1/Thickseam Working Volume-1 Thickseam Working Admin02/08/20240 133 Less than a minute Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 0% Thick Seam Working Thickseam Working 1 / 37 1. In Wongawalli method of working when air borne dust is more the application of water infusion is done at a pressure of ? 10-12 litres/m2/hr 20-22 litres/m2/hr 30-32 litres/m2/hr 40-42 litres/m2/hr 2 / 37 2. The cross section of each slice in inclined slicing method is normally ? 1-1.5m 1.5-2m 2-2.5m 2.5-3m 3 / 37 3. The blocks of solid coal with pillars are formed are called? sections panels barriers squares 4 / 37 4. In multi slice method of extraction the pillars of the lower section is always ? larger than the upper section equal to the upper section smaller than the upper section none of the above 5 / 37 5. Multi slice method of extraction is adopted where? the thickness of the seam is more gradient of the seam is more occurrence of gas occurrence of faults 6 / 37 6. In CM working the miners engaged in coal extraction work as a team known as ? team band crew group 7 / 37 7. In sublevel caving method extraction is always done by ? drilling and blasting coal cutting machine continuous miner shearing 8 / 37 8. While working thick seams the slicing method which works in horizontal slices between floor and roof is called ? under winning over winning in winning out winning 9 / 37 9. The normal productivity of C.M. workings is about ? 300-400 tonnes 400-500 tonnes 500-600 tonnes 600-700 tonnes 10 / 37 10. In multi slice method extraction of the top section is called? under winning over winning in winning out winning 11 / 37 11. In multi slices method of extraction the thickness of each slice should not exceed ? 1.0m 1.5m 2.0m 3.0m 12 / 37 12. In inclined slicing method the percentage of extraction is ? 60-70% 70-80% 80-90% 90-100% 13 / 37 13. In Wongawalli method of working the coal bands remaining in the goaf after extraction may lead to? Air blast Rock burst Bumps Spontaneous heating 14 / 37 14. The extraction of roof coal at different intervals is called ? caving slicing slicing and caving both a & b 15 / 37 15. While working thick seams the slicing method which works from the roof of the seam towards the floor is called ? under winning over winning in winning out winning 16 / 37 16. The remaining pillars after extraction in Wongawalli method is extracted as in? retreating longwall advancing longwall bord and pillar top slicing 17 / 37 17. The method which allows to recover more percentage of coal deposit is? caving stowing longwall both of the above 18 / 37 18. In multi slice method extraction of the bottom section is called? under winning over winning in winning out winning 19 / 37 19. The extraction of roof coal at different intervals is called ? caving slicing slicing and caving both a & b 20 / 37 20. In multi slice longwall method of working the first slice normally extracted is ? top slice middle slice bottom slice none of the above 21 / 37 21. The method of working which resembles step diagonal method of bord and pillar ? sublevel caving longwall thick seam mining room and pillar 22 / 37 22. The grade of roof required for Wongawalli method? strong moderate weak very weak 23 / 37 23. While working thick seams the slicing method which works in horizontal slices between floor and roof is called ? under winning over winning in winning out winning 24 / 37 24. The Wongawalli method is? a caving method a stowing method top slicing method sublevel method 25 / 37 25. While working thick seams the slicing method which works from the bottom of the seam towards the roof is called ? under winning over winning in winning out winning 26 / 37 26. While working thick seams the method of working does not leave any coal bands in the goaf? caving stowing both of the above none of the above 27 / 37 27. In working thick seams by inclined slicing method the angle of inclination of slicing face to the horizontal is always between ? 20-25 degrees 25-30 degrees 30-40 degrees 40-50 degrees 28 / 37 28. In sublevel caving method the unit of operation is always carried out in? development of roadways room and pillar advance galleries sublevel drifts 29 / 37 29. In thick seam mining using caving method the percentage of extraction is about ? 30% 50% 70% 90% 30 / 37 30. In multi slice longwall the face length of each slice should not be less than ? 30m 40m 50m 60m 31 / 37 31. The depth of development galleries are? 5m 6m 7m 8m 32 / 37 32. The Wongawalli method is developed by? TISCO BCCL SCCL GSI 33 / 37 33. The method of working does not allow any interlaced pillars of solid coal within the depillared area except the fender or snook of coal left on the sides of the gate roads ? Arrow head method Step diagonal Wongawalli method Bord and pillar 34 / 37 34. The method which uses combination of caving and slicing is? slicing caving longwall sublevel caving 35 / 37 35. While working thick seams the slicing method which works in horizontal slices between floor and roof is called ? under winning over winning in winning out winning 36 / 37 36. The angle of inclination of slicing face to the vertical while working thick seams is always ? 40 degrees 45 degrees 50 degrees 60 degrees 37 / 37 37. The general line of extraction adopted in Wongawalli method is ? Diagonal Step diagonal Parallel to the strike Arrow head method Your score is The average score is 37% LinkedIn Facebook Twitter 0% Admin02/08/20240 133 Less than a minute
