观测时间/d | 顶底板移近量增量/mm | 顶底板平均移近速度/(mm/d) | 两帮移近量增量/mm | 两帮平均移近速度/(mm/d) |
0~10 | 89 | 8.9 | 79 | 7.9 |
10~20 | 52 | 5.2 | 48 | 4.8 |
20~40 | 40 | 2.0 | 36 | 1.8 |
40~70 | 36 | 1.2 | 31 | 1.03 |
70~100 | 33 | 1.1 | 29 | 0.97 |
100~130 | 88 | 2.9 | 78 | 2.6 |
130~160 | 120 | 4.0 | 108 | 3.6 |