Advances in Civil Engineering / 2020 / Article / Tab 4

Research Article

A Study of the Laws of Abnormal Gas Emissions and the Stability Controls for Coal Mine Walls in Deeply Buried High-Gas Coal Seams

Table 4

Liquid saturation in the gaps between particles and the corresponding liquid bridge shapes.

Liquid saturationLiquid bridge shapesSchematic diagramsPhysical mechanisms

0No liquid bridge force between particles

S < 30%Pendulum shapeParticles are connected by liquid bridges at the contact points; liquid bridges are thin

30% < S < 70%Cable belt shapeLiquid bridges exist around the contact points; some particle gaps are filled with liquid resulting in increased adhesion

S > 70%Capillary shapeGap between particles is almost fully filled with liquid; surfaces of the liquid are sunken; attraction between particles is obviously increased

S > 100%Slurry shapeLiquid pressure is equal to or greater than the air pressure; almost no adhesion exists between the particles

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