Application of the Technology of Roadway Strength Bolting Supporting in Entries under Secondary Dynamic Pressure with Small Coal-pillar
HAO Deng-yun
Abstract：Based on the 2217 entry retained for next working face in Qinxin coal mime in Shanxi province ,the characteristics of deformation and damage associated with this entry are analyzed , rational coal-pillar width was determined.With once support principle of high pre -tension powerful bolt , the reinforcement patterns and parameters suitable for entries retained for next face are proposed based on above researches .The sur-rounding rock displacements , rock bolt and cable loads are monitored during the whole service period of the entries retained.The research results show: The rock bolts and cables with high pretension and intensive strength can reduce surrounding rock displacements greatly and keep the entries stable for a long time and the problem of small coal-pillar entry retaining under this condition was solved .
Keywords：small coal-pillarsecondary dynamic Pressurebolts and cables with high pretension and inten-sive strengthmining influence
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 66-69,91 )