Research Article
Determining the Height of Water-Flowing Fractured Zone in Bedrock-Soil Layer in a Jurassic Coalfield in Northern Shaanxi, China
Table 2
Material matching scheme of the physical simulation model of the 2−2 coal seam mining in Caojiatan coal mine.
| | No. | Lithology | The thickness of the original rock (m) | The accumulated thickness of the original rock (m) | The thickness of the model (cm) | The accumulated thickness of the model (cm) | Sand (g/cm) | Gypsum (g/cm) | The big white powder (g/cm) |
| | 1 | 2−2 coal seam | 12.0 | 10.0 | 5.0 | 5.0 | — | — | — | | 2 | Siltstone | 2.0 | 12.0 | 1.0 | 6.0 | 8640 | 288 | 672 | | 3 | Fine grained sandstone | 14.0 | 26.0 | 7.0 | 13.0 | 7680 | 576 | 1344 | | 4 | Coarse grained sandstone | 18.0 | 44.0 | 9.0 | 22.0 | 7680 | 384 | 1536 | | 5 | Medium grained sandstone | 6.0 | 50.0 | 3.0 | 25.0 | 7680 | 768 | 1152 | | 6 | Siltstone | 22.0 | 72.0 | 11.0 | 36.0 | 8640 | 288 | 672 | | 7 | Coarse grained sandstone | 22.0 | 94.0 | 11.0 | 47.0 | 7680 | 384 | 1536 | | 8 | Medium grained sandstone | 10.0 | 104.0 | 5.0 | 52.0 | 7680 | 768 | 1152 | | 9 | Coarse grained sandstone | 14.0 | 118.0 | 7.0 | 59.0 | 7680 | 384 | 1536 | | 10 | Siltstone | 2.0 | 120.0 | 1.0 | 60.0 | 8640 | 288 | 672 | | 11 | Fine grained sandstone | 6.0 | 126.0 | 3.0 | 63.0 | 7680 | 576 | 1344 | | 12 | Siltstone | 6.0 | 132.0 | 3.0 | 66.0 | 8640 | 288 | 672 | | 13 | Fine grained sandstone | 2.0 | 134.0 | 1.0 | 67.0 | 7680 | 576 | 1344 | | 14 | Siltstone | 4.0 | 138.0 | 2.0 | 69.0 | 8640 | 288 | 672 | | 15 | Sandy mudstone | 2.0 | 140.0 | 1.0 | 70.0 | 8640 | 192 | 768 | | 16 | Siltstone | 2.0 | 142.0 | 1.0 | 71.0 | 8640 | 288 | 672 | | 17 | Medium grained sandstone | 6.0 | 148.0 | 3.0 | 74.0 | 7680 | 768 | 1152 | | 18 | Fine grained sandstone | 4.0 | 152.0 | 2.0 | 76.0 | 7680 | 576 | 1344 | | 19 | Siltstone | 14.0 | 166.0 | 7.0 | 83.0 | 8640 | 288 | 672 | | 20 | Sandy mudstone | 4.0 | 170.0 | 2.0 | 85.0 | 8640 | 192 | 768 | | 21 | Medium grained sandstone | 2.0 | 172.0 | 1.0 | 86.0 | 7680 | 768 | 1152 | | 22 | Fine grained sandstone | 2.0 | 174.0 | 1.0 | 87.0 | 7680 | 576 | 1344 | | 23 | Siltstone | 6.0 | 180.0 | 3.0 | 90.0 | 8640 | 288 | 672 | | 24 | Medium grained sandstone | 4.0 | 184.0 | 2.0 | 92.0 | 7680 | 768 | 1152 | | 25 | Fine grained sandstone | 2.0 | 186.0 | 1.0 | 93.0 | 7680 | 576 | 1344 | | 26 | Laterite | 36.0 | 222.0 | 18.0 | 111.0 | 8640 | 96 | 864 | | 27 | Loess | 40.0 | 262.0 | 20.0 | 131.0 | 8640 | 96 | 864 | | 28 | Drift sand | 18.0 | 280.0 | 9.0 | 140.0 | 8640 | 96 | 864 |
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