Research on Seepage Properties and Pore Structure of the Roof and Floor Strata in Confined Water-Rich Coal Seams: Taking the Xiaojihan Coal Mine as an Example

<div>Testing system of permeability of rocks under variable grains diameter and axial displacement. Note: A: pressure sensor; B: load controller; C: relief valve; D: regulator; E: pressure difference sensor; F: drainage; S1∼S15: switch.</div>

Advances in Civil Engineering

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Figure 4

Figure 4: Research on Seepage Properties and Pore Structure of the Roof and Floor Strata in Confined Water-Rich Coal Seams: Taking the Xiaojihan Coal Mine as an Example 

Figure 4 | Research on Seepage Properties and Pore Structure of the Roof and Floor Strata in Confined Water-Rich Coal Seams: Taking the Xiaojihan Coal Mine as an Example 