Research Article
Accurate Perception of Rock Strata Movement for Environmental Protection in Coal Mining: Taking Thick and Hard Roof Cooperative Control as an Example
Table 2
Characteristics of the working resistance of working face 880.
| ā | Line | Working resistance (kN) | Average value | Standard deviation | Maximum value |
| Maximum resistance | Head position Middle position End position | 10111.9 11955.6 11156.3 | 1746.5 1918.5 2442.3 | 11654.1 12675.4 12280.8 | Average | 11074.5 | 2035.7 | 12203.5 | Time-weighted mean resistance | Head position Middle position End position | 11008.0 11864.0 11653.8 | 2372.2 1844.8 2353.5 | 11974.7 12389.5 12030.8 | Average | 11508.5 | 2190.2 | 12131.6 |
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