Research Article
Study on Reasonable Chain Pillar Size in a Thick Coal Seam
| Lithology | Tensile strength/MPa | Cohesion/MPa | Friction/° | Bulk modulus/GPa | Shear modulus/GPa |
| Mudstone | 1.25 | 1.70 | 26.44 | 0.82 | 0.49 | Sandstone | 1.51 | 1.47 | 23.16 | 0.70 | 0.46 | Siltstone | 1.43 | 3.14 | 35.85 | 1.07 | 0.77 | Coal | 0.72 | 1.99 | 26.81 | 0.35 | 0.14 |
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