Numerical Design of Pillar Width in the Inclined Coal Seam

Jun De Qi; Jing Chai; Jing Zhao Zhang

doi:10.4028/www.scientific.net/AMR.977.361

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 977Numerical Design of Pillar Width in the Inclined...

Numerical Design of Pillar Width in the Inclined Coal Seam

Abstract:

Numerical tests were conducted with six different pillar width to determine the optimal pillar width of the inclined coal seam based on the fracture and deformation characteristics. The results show that, the fracture zone in pillar is consistent when the pillar width is 3m, while the fracture zone is inconsistent when the pillar width is larger than 5m. When the pillar width is 3m, the pillar is completely fractured, and the shear fracture zone in pillar increase gradually with the pillar width ranges from 5m to 10m,. There has the smallest heaving floor when the pillar width is 5m, while the largest heaving floor when the pillar width is 10m. The reasonable pillar width is 5m.