(i) How would you conduct a reconnaissance survey for a railway project?
(i) How would you conduct a reconnaissance survey for a railway project?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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(i) How would you conduct a reconnaissance
(ii) In a pillar and stall, or stoop and room workings, the stalls or rooms are 12 ft in width and the pillars are 40 yd square. Calculate the approximate tonnage of coal extracted from the stalls or rooms, in a seam 7 ft 9 in. in thickness, dipping 19° from the horizontal, under surface area V/2 acres in extent. Assume a yield of 125 tons per inch-acre, and deduct 3%% for loss in working.
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