Research Article
Study of Instability Mechanism and Roof Caving Mode of Cementing Filling Stope: The Case Study of a Nonferrous Metal Mine in China
Table 2
Microscopic parameters of the rock.
| | Parameters | Value | | Gneiss | Ore body | Filling body | Quaternary soil |
| | Density (kg/m3) | 2700 | 2800 | 2200 | 2000 | | Contact bond modulus (GPa) | 17.94 | 14.35 | 4.36 | 4.36 | | Contact bond stiffness ratio | 1.57 | 1.57 | 1.57 | 1.57 | | Friction coefficient | 0.25 | 0.25 | 0.25 | 0.25 | | Parallel bond tensile strength (MPa) | 5.79 | 4.63 | 2.07 | 0.56 | | Parallel bond cohesion (MPa) | 4.83 | 3.86 | 1.73 | 0.47 | | Parallel bond friction angle (°) | 40 | 42 | 39 | 38 | | Parallel bond modulus (GPa) | 17.94 | 14.35 | 4.36 | 4.36 | | Parallel bond stiffness ratio | 1.57 | 1.57 | 1.57 | 1.57 |
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