Mining Engineering > GATE 2018 > Underground Coal Mining
Exposure of weak roof in junctions of a development district in a coal mine can be decreased by
A
increasing dimension of panel barrier
B
stitching side walls
C
increasing support density at junctions
D
staggering the junctions

Correct : d

Similar Questions

A Bord and Pillar panel is developed at a depth of 250 m in a flat coal seam. The vertical stress gradient is 0.027 MPa/m. If the strength of a square pillar is...
#43 Fill in the Blanks
For a continuous miner (CM) panel, the following data are given. Data related to CM A Table: Assume, unit weight of coal is 1.4 tonne/m3 and its swell facto...
#54 Fill in the Blanks
'Critical subsidence has occurred on the surface due to mining of a flat longwall panel at a depth of 200 m. The width of the panel is 150 m. The maximum width...
#87 Fill in the Blanks

Related Topics

weak roof junctions exposure mining engineering GATE 2018 increase support density stagger junctions panel barrier dimensions side wall stitching mining engineering questions roof exposure mitigation

Unique Visitor Count

Total Unique Visitors

Loading......