Based on roof breakage and serious rib spalling in soft coal seam mining, especially in the mined-out area extremely close with goaf, how to effectively control tip-to-face roof was a problem, Baijiao mine used hydraulic support welding half circle stabilized under the support beam, through "bayonet" approach to support the tip-to-face roof bolting, increased support for roof control, effectively solved the production technology problem, provided the referential experience for the similar situation.
