DOI: 10.11799/ce201707013
Rapid tunneling technology for deep semi coal and rock roadwayunder complex geological conditions
CONG Li
Abstract：Aiming at the low tunneling efficiency of roadway with bolt-mesh-cable support for the deep semi coal rock in Hulusu Coal Mine,a rapid tunneling technology is proposed.Theoretical basis of the technology is roof continuous beam,and the key technique is high pre-tensioned full length flexible anchoring bolt.The pre-tensioned anchor bolt forms anchored rock beam,which is thick enough to eliminate the layer separation,avoid instability and eventually realize bidirectional linkage in one layer and between multi-layers.The results show that,after the transformation from bolt-mesh-cable support into flexible bolt support,the support procedure is remarkably simplified with roadway deformation effectively controlled.The tunneling speed was improved by 44%,from 500m per month to720m per month.Favorable technical and economic effect is achieved.
Keywords：semi coal and rock roadwaysrapid tunnelingbolt-mesh-cable supportflexible bolt support
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 45-47 )