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

Table 6

List of strata crossed by the ventilating shaft.

Strata	Thickness (m)	Lithological characteristics	Hydrogeological feature
Quaternary system	217	Coarse, medium, and fine sandstone, clay, and sandy clay	Lacks an important sandstone seepage section
Jurassic system	516	Fine sandstone, siltstone, and magmatic rock	Contains 3 main sandstone seepage sections
Permian system	311	Coarse, medium, and fine sandstone, siltstone, mudstone, and sandy clay	Contains 3 main sandstone seepage sections