采矿与安全工程学报2017，Vol.34Issue(3)：535-541,7.DOI:10.13545/j.cnki.jmse.2017.03.019
冲击地压巷道桁架锚索支护原理与实践
The supporting principle of truss cable in the rockburst roadway and its application
摘要
Abstract
In view of the problem of controlling surrounding rocks in the rockburst roadway,the combined support of truss cable and bolt was put forward.The principle of truss cable supporting in the rockburst roadway is studied through theoretical analysis and in-situ practice,the mechanical model of cable supporting was set up based on the theory of material mechanics and rock mechanics,and anti-rockburst effect between supporting with single anchor cable and supporting with truss cable was studied comparatively.The result has shown that not adapted to the deformation of surrounding rocks of roadway and bolts,the common single cable always fails first,and thus the supporting system is divided and conquered,which leads to rockburst;compared against the single anchor cable supporting,the maximum tensile stress of surrounding rocks supported by truss cable reduces by Fsin α+F,the maximum shear stress reduces by Fcos α,and the maximum deformation increased by ckcos α,and to a certain extent the coordinated supporting against rockburst can be realized with the truss cable and bolt system.Energy theory analysis has shown that the truss cable supporting system absorbs D(2a/cos α+ 2c-2a) more energy than the common single cable supporting system,and its anti-rockburst ability is stronger.The field application has shown that combined supporting of truss cable and bolt can effectively prevent and control rockburst.关键词
冲击地压/桁架锚索/支护原理/现场应用Key words
rockburst/truss cable/supporting principle/field application分类
矿业与冶金引用本文复制引用
姚精明,王路,闫永业,何富连,蹇伦..冲击地压巷道桁架锚索支护原理与实践[J].采矿与安全工程学报,2017,34(3):535-541,7.基金项目
中央高校基本科研业务费专项资金项目(CDJZR13240025) （CDJZR13240025）
