Base on the back ground of Dafosi mine project, the key stratatheory and cusp catastrophe theory was applied to analyze the mine water inrush mechanism from roof.
Based on the key stratatheory of the ground control and analyzing the condition of geology and mine in the shallow coal seam, the characteristic parameters of the key strata are educed.
基于岩层控制关键层理论，在分析浅埋煤层地质采矿等条件下，得出了浅埋煤层关键层的特征参数。
3
On the basis of key rock stratatheory, transferring rock beam structure and the law of the overlying strata displacement and the surface subsidence theory, we deduced offset error formula.