Research Article
A DOFS-Based Approach to Calculate the Height of Water-Flowing Fractured Zone in Overlying Strata under Mining
Table 1
Mechanical parameters of the prototype and the model and ratio of similar materials in Daliuta Coal Mine.
| | Rock layer name | Prototype | Test model | | Layer thickness/m | Bulk density/kN/m3 | Compressive strength/MPa | Tensile strength/MPa | Elastic modulus/GPa | Layer thickness/cm | Bulk density/kN/m3 | Compressive strength/kPa | Tensile strength/kPa | Elastic modulus/MPa | Ratio of similar materials |
| | Unconsolidated layer | 40 | 17 | 0.7 | - | - | 40 | 11.3 | 4.7 | - | - | 11 : 1 : 0 | | Sandy mudstone | 6 | 24.1 | 17.2 | 1.84 | 1.58 | 6 | 16.1 | 114.9 | 12.3 | 10.6 | 8 : 6 : 4 | | Fine sandstone | 5 | 28 | 36.5 | 1.81 | 3.08 | 5 | 18.7 | 243.8 | 12.1 | 20.6 | 3 : 5 : 5 | | Sandy mudstone | 7 | 24.1 | 17.2 | 1.84 | 1.58 | 7 | 16.1 | 114.9 | 12.3 | 10.6 | 8 : 6 : 4 | | Mudstone | 9 | 24.3 | 15.3 | 1.53 | 1.37 | 9 | 16.2 | 102 | 10.2 | 9.1 | 10 : 5 : 5 | | Fine sandstone | 13.5 | 28 | 36.5 | 1.81 | 3.08 | 13.5 | 18.7 | 243.8 | 12.1 | 20.6 | 3 : 5 : 5 | | Sandy mudstone | 6 | 24.1 | 17.2 | 1.84 | 1.58 | 6 | 16.1 | 114.9 | 12.3 | 10.6 | 8 : 6 : 4 | | 2-2 coal | 4.2 | 13 | 15 | 1.99 | 1.17 | 4.2 | 8.7 | 100.4 | 13.3 | 7.8 | 6 : 5 : 5 | | Sandy mudstone | 6 | 24.1 | 17.2 | 1.84 | 1.58 | 6 | 16.1 | 114.9 | 12.3 | 10.6 | 8 : 6 : 4 | | 2-3 coal | 4.2 | 13 | 15 | 1.99 | 1.17 | 4.2 | 8.7 | 100.4 | 13.3 | 7.8 | 6 : 5 : 5 | | Sandy mudstone | 5 | 24.1 | 17.2 | 1.84 | 1.58 | 5 | 16.1 | 114.9 | 12.3 | 10.6 | 8 : 6 : 4 |
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