Study was conducted on the roof of No. 3604S4 coal face and the actual mining roadway with fractals, and a few kinds of functional values of subsidencevelocity of this face were obtained.
用分形对3604S4工作面和回采巷道顶板进行了研究，得到了该工作面下沉速度的几种分维值。
2
The result showed that, the point subsidence of the building was even, and the volume extent and velocity was limited.
分析结果表明，施工各阶段，建筑物主体体沉降速率及幅度均较小，各点沉降基本均匀。
3
The results showed that the settling velocity of tailings at different concentrations is very low as natural subsidence.