Table 1 Physico-mechanical properties of the No. 7 coal seam in Zhangshuanglou coal mine.
From: Study on the phenomenon of the ultra-large drilling cuttings quantity in rockburst coal seam
Unit weight kg/m3 | Compressive strength MPa | Elastic modulus MPa | E/λ |
|---|---|---|---|
1500 | 17.4 | 2676 | 0.24 |
