Exact(4)
The protected layer evolutional characteristics of vertical stress, vertical displacement and pressure relief affection which coal pillar affected were analyzed.
(2) Coal pillar affected zone is low strain region.
Coal pillar decreases protected layer overall deformation, not just reduce deformation of coal pillar affected zone.
The results show that: (1) Coal pillar affected zone is high stress concentrated zone.
Similar(55)
During retreat mining, serious bumps occurred in the gateroads on both sides of the pillar affecting safety production.
The novel subwavelength structures surface exhibit excellent broadband antireflection properties, but the size of the pillar affects the antireflective properties in short wavelength region.
This study indicated that, globally, cervical pillar hyperplasia does not appear to have an effect on the development of degenerative joint disease; however, because previous research suggests that cervical pillar hyperplasia affects the cervical lordosis, it is recommended that further research explore any segment-specific contribution of pillar hyperplasia to the development and severity of DJD.
The increase of mining height will have a great impact on the stress distribution in the coal pillar, thus affecting the stress distribution of surrounding rock of the roadway.
The wetting behavior of a droplet on a patterned surface, e.g. an array of pillars, is generally affected by the orientation, surface density (distance), size, and the shape of the pillars.
On the other hand, 14%% of the bursts occurred during entry development, and another 13%% affected pillars in the headgate, bleeder, or other outby locations.
These observations support the assumption that air pressure enhances adhesion due to suction in patterned bioinspired surfaces with structure sizes in the macroscopic range, while detachment events after buckling of the pillars are not affected by air pressure, since suction cannot be maintained after buckling has occurred.
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