Sentence examples for pillar width from inspiring English sources
a Coal pillar width 10 m b coal pillar width 20 m c coal pillar width 30 m d coal pillar width 40 m.
The pillar width was varied in accordance to opening width.
Vertical deformation is negative correlation with coal pillar width.
The pillar width (w) between two openings was assumed to be 4 and 2 m wide.
The pillar strength index increases with the increasing pillar width for both shapes of openings.
As the pillar width reduces, the interaction effects becomes more evident.
Pillar width-to-height (w/h) ratio has long been established as having a material influence on both pillar strength and its potential failure mode.
Four different pillar widths (w), 25, 50, 75 and 100 mm, were evaluated.
Open image in new window Fig. 58 Stress distribution of roadway surrounding rock with different coal pillar widths.
Our calculations and simulation results demonstrate that a coal yield of 46% can be achieved with safety pillar widths of 100 m.
The results showed that the interaction effects were related not only to the geological condition and tunnel cross-section, but also the rock pillar widths.
