Research Article
Simulated Experiment of Water-Sand Inrush across Overlying Strata Fissures Caused by Mining
Table 1
Similar material ratio of different strata.
| | Number of stratum | Lithology | Real rock stratum | Similar material | Material ratio (sand: paraffin: Vaseline: hydraulic oil: lime carbonate) | | Thickness/m | Uniaxial compressive strength/MPa | Thickness/m | Uniaxial compressive strength/kPa |
| | 10 | Aeolian sand | 50 | – | 0.20 | – | Color sand | | 9 | Mudstone | 10 | 18.8 | 0.04 | 50.1 | 40 : 0.4 : 1 : 1 : 3 | | 8 | Fine sandstone | 10 | 22.4 | 0.04 | 59.7 | 40 : 0.43 : 1 : 1 : 3 | | 7 | Medium sandstone | 7.5 | 32.2 | 0.03 | 85.9 | 40 : 0.5 : 1 : 1 : 3 | | 6 | Arenaceous mudstone | 5 | 36.7 | 0.02 | 97.9 | 40 : 0.54 : 1 : 1 : 3 | | 5 | Fine sandstone | 7.5 | 46.9 | 0.03 | 125.1 | 40 : 0.62 : 1 : 1 : 3 | | 4 | Mudstone | 5 | 30.1 | 0.02 | 80.3 | 40 : 0. 5 : 1 : 1 : 3 | | 3 | Medium sandstone | 7.5 | 40.5 | 0.03 | 108.0 | 40 : 0.6 : 1 : 1 : 3 | | 2 | Fine siltstone | 10 | 35.7 | 0.04 | 95.2 | 40 : 0.53 : 1 : 1 : 3 | | 1 | Mudstone | 5 | 26.5 | 0.02 | 70.7 | 40 : 0.46 : 1 : 1 : 3 | | 0 | Coal seam | 7.5 | 10.4 | 0.03 | – | Steel plates for simulating the coal seam |
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