Pore permeability is the permeability of a single pore of a rock, while reservoir permeability is the equivalent value of pore permeability on the whole cross-section of the rock.
孔隙渗透率是单根孔隙的渗透率，地层渗透率是孔隙渗透率折算到整个地层截面积之上的渗透率。
The construction method of large cross section airbridge in soft rock is presented in this paper.
阐述了软岩中大断面风桥的施工方法。
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