Optimal Design of Small Pillar Link-roadway of Partial W-type Ventilation

By the means of numerical simulation, it analyzed the surrounding rock deformation and stress behavior law when driving and mining of link-roadway on the condition of partial W-type ventilation, and made optimal design for small pillar link-roadway of partial W-type ventilation. The results showed that link-roadways distance made very little difference to the stability of link-roadway if it was greater than 40m; the angle between link-roadway and working face was the major influence factor, and it obtained that roadways and surrounding space deformed severely within 60°～120°；The optimal design scheme was that the link-roadway was in sequence arranged inside according to the distance of 220m and azimuth of 135°.Finally, the engineering application testified the rationality of the design.