Formation Mechanism of “Large-Area Sweating” Water Seepage from Deep Mine Sandstone Pores

Table 2

Contents of the three main pore types in deep mine sandstone.

Sandstone type	Intergranular pores (%)	Intragranular pores (%)	Intercrystalline pores (%)
Jurassic sandstone	3.2-10.1	0.7-1.7	0.1-0.2
Shihezi sandstone	0.8-5.0	0.8-3.5	0.1-0.5
Shanxi sandstone	0.5-6.1	0.4-2.9	0.1-0.3

The contents in this table indicate the visual area percentage of the sandstone samples.