1985
DOI: 10.1016/0148-9062(85)90150-0
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How to eliminate roof and floor failures with yield pillars. Part II

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Cited by 4 publications
(4 citation statements)
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“…Empirical, analytical, and field test methods are often used for the study and design of the coal pillar size. Carr et al comparatively tested pillars with different widths in three mines to determine a rational coal pillar width. Salomon presented an empirical design criterion and calculation for the pillar width to improve mineral excavations by pillar mining while assuming a roof control, which is widely used in analyses of the coal pillar strength and size.…”
Section: Introductionmentioning
confidence: 99%
“…Empirical, analytical, and field test methods are often used for the study and design of the coal pillar size. Carr et al comparatively tested pillars with different widths in three mines to determine a rational coal pillar width. Salomon presented an empirical design criterion and calculation for the pillar width to improve mineral excavations by pillar mining while assuming a roof control, which is widely used in analyses of the coal pillar strength and size.…”
Section: Introductionmentioning
confidence: 99%
“…Among those issues, floor heave in longwall gateroads has drawn increasing attention due to its significant effect on mining safety and efficiency. In-mine measurement indicates that the magnitude of floor heave in the gateroads may reach up to 900–1200 mm, depending on the geological and mining conditions [ 2 , 16 ]. Severe floor heave significantly reduces the accessibility of the entries and, in some cases, causes longwall panels to be abandoned.…”
Section: Introductionmentioning
confidence: 99%
“…Researchers have studied the mechanism of floor heave in longwall gateroads. Some researchers stated that the floor heave occurs when the loads transferred by the pillars exceed the bearing capacity of the pillar foundation (immediate floors) [ 16 ]. Researchers further divided the floor under a pillar foundation into three distinct zones: active zone, radial shear zone and passive zone [ 17 ].…”
Section: Introductionmentioning
confidence: 99%
“…In a latter paper, Carr et al, (1985) proposed using a "pillar resistance to load ratio," or stability factor. They suggested that a stability factor of 1.4 should be used for abutment pillars subjected to tailgate loading, while 1.0 is adequate for single-use pillars.…”
Section: [ Carr and Wilson's Methodsmentioning
confidence: 99%