Prevention Measures for Rib Spalling at Large Mining Height Working Face

In view of the severe rib spalling of 4301 coal face in Sihe Coal Mine, according to the comprehensive analysis of the mechanism and the influencing factors of the rib spalling, through adopting the measures, such as using secondary retractable protecting sides board of hydraulic support, support in time, improving setting load, speeding up advancing speed, rib spalling is controlled, and safe production is realized.