关键词: 深井, 三软煤巷, 大断面, 围岩变形, 支护设计

Abstract: In order to solve the serious problem of support technology of large section roadways in deep three- soft coal seam,in combination with the practical situation of working face in Renlou Mine and failure reasons of the original roadway supporting, composite reinforced supporting technology solutions of Initial high- performance bolting、neting and shotcreting and secondary bolting and grouting was proposed,the detailed technical parameters were given in the surrounding rock control technology.The field monitoring and data statistics indicate: the new supporting technology plan has better obvious effects,the maximum roof-to floor convergence was 65mm，the maxinum rib-to-rib convergence was 43mm,the average speed of roof-to-floor was 1.3mm/d,the average speed of rib-to-rib was 0.86mm/d,the deformation of roadway was controlled effectively,satisfies the requirement of roadway support.

Key words: three soft roadway, large section, the deformation of surrounding rock, support parameters