Research Article
A Large Goaf Group Treatment by means of Mine Backfill Technology
Table 3
Statistical results of goaf volume in 808 m level.
| Stop number | Stope position | Stope span (m) | Stope height (m) | Stope thickness (m) | Exposed area of roof (m2) | Exposed perimeter of roof (m) | Goaf volume (m3) | Results of stability graph method |
| 808–1# | 1–3 line | 20 | 15 | 10.5 | 210 | 61 | 260.8 | Transition zone | 808–2# | 3–5 line | 41 | 34 | 9.8 | 401.8 | 101.6 | 638.6 | Transition zone | 808–3# | 5–7 line | 42 | 34 | 9.5 | 399 | 103 | 646.2 | Transition zone | 808–4# | 7–9 line | 41 | 10 | 1.5 | 61.5 | 85 | 78.1 | Stable zone | 808–5# | 9–11 line | 41 | 34 | 8.5 | 348.5 | 99 | 569.5 | Transition zone | 808–6# | 11–13 line | 42 | 34 | 8 | 336 | 100 | 557.1 | Transition zone | 808–7# | 13–15 line | 42 | 34 | 7.5 | 315 | 99 | 557.6 | Transition zone | 808–8# | 17–19 line | 41 | 34 | 12 | 492 | 106 | Backfilled | Caving zone | 808–9# | 19–21 line | 40 | 30 | 5 | 200 | 90 | 327.5 | Transition zone | 808–10# | 21–23 line | 40 | 12 | 6 | 240 | 92 | 253.5 | Transition zone | 808–11# | 23–25 line | 40 | 34 | 40 | 1600 | 160 | 3813.3 | Caving zone | 808–12# | 25–27 line | 41 | 34 | 30 | 1230 | 142 | 2521.4 | Caving zone | 808–13# | 27–29 line | 40 | 30 | 15 | 600 | 110 | 709.8 | Caving zone | 808–14# | 29–31 line | 38 | 25 | 3 | 114 | 82 | 76.0 | Transition zone | 808–15# | 31–33 line | 39 | 27 | 3 | 117 | 84 | 215.8 | Transition zone | 808–16# | 31–35 line | 40 | 27 | 3 | 120 | 86 | 193.5 | Transition zone | 808–17# | 35–37 line | 40 | 22 | 3 | 120 | 86 | 319.7 | Transition zone | 808–18# | 37–39 line | 38 | 27 | 5 | 190 | 86 | 593.4 | Transition zone | 808–19# | 39–41 line | 35 | 34 | 5 | 175 | 80 | 365.9 | Transition zone | 808–20# | 41–45 line | 45 | 12 | 8 | 360 | 106 | Backfilled | Transition zone | 808–21# | 53–55 line | 45 | 30 | 30 | 1350 | 150 | 1827.3 | Caving zone | 808–22# | 55–57 line | 39 | 30 | 20 | 780 | 118 | 1066.0 | Caving zone | 808–23# | 57–59 line | 45.1 | 8 | 7.5 | 338.25 | 105.2 | 1523.0 | Transition zone | 808–24# | 57–59 line | 42 | 8 | 7.5 | 315 | 99 | 335.4 | Transition zone | 808–25# | 61–63 line | 46 | 8 | 3 | 138 | 98 | 1162.2 | Transition zone | 808–26# | 61–63 line | 46 | 8 | 3 | 138 | 98 | 1097.2 | Transition zone | 808–27# | 65–67 line | 45.5 | 34 | 6 | 273 | 103 | 3408.0 | Transition zone | 808–28# | 67–69 line | 32.4 | 34 | 4 | 129.6 | 72.8 | 2113.8 | Stable zone | Total | 25230.6 |
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