The opening stability in soft weakcoal layer is important to the safe production in a mine.
软弱煤层巷道的稳定性对煤矿正常安全生产起着重要作用。
2
The time to produce damage deformation in surrounding rock and possible loosening area are obtained by analyzing in situ measurement of displacement in soft weakcoal layer.
The surrounding rock of roadway is a compound structure consisted of roof, floor and sides. The sides of extraction opening are the weakcoal mass, which affect the stability of floor directly.