Abstract Understanding the shear failure mechanisms of coal mass is essential to dealing with mining issues, including roof collapses, pillar instabilities, and severe roadway closures. A numerical three-dimensional synthetic rock-mass… Click to show full abstract
Abstract Understanding the shear failure mechanisms of coal mass is essential to dealing with mining issues, including roof collapses, pillar instabilities, and severe roadway closures. A numerical three-dimensional synthetic rock-mass method was used to study the shear behavior of coal mass. It was found that the peak and residual shear strength increase significantly with normal load. The shear stiffness also increases, especially at a low normal stress. The dilation decreases significantly with a normal load. Coal joints tend to reduce dilation and control the shear-rupture geometry. The effect of the joints on the shear failure decreases with a normal load.
Journal Title: Computers and Geotechnics
Year Published: 2019
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