文档介绍：第 34卷第 9期煤炭学报
2009年 9月 JOURNALOFCHINACOALSOCIETY Sep. 2009
文章编号:0253 -9993(2009)09 -1153-07
全断面高预应力强力锚索支护技术及其
在动压巷道中的应用
康红普, 林健, 吴拥政
(煤炭科学研究总院开采设计研究分院, 北京 100013)
摘要:分析了目前煤矿锚索支护存在的问题, 在高预应力强力支护理论的基础上, 提出高预应
力、长度较短的强力锚索, 并全断面垂直岩面布置, 是高地压、
绍了强力锚索及配套护表构件的力学性能, 将强力锚索、拱形大托板及钢筋网组成全断面强力锚
索支护系统, 在锚索施加预应力的同时, 给钢筋网也施加了较高的预应力, 使钢筋网成为预应力
、受
2次强烈动压影响的巷道中, 进行了全断面高预应力强力锚索支护技术试验, 巷道支护状况发生
90%, 顶板离层几乎为 0, 围岩变形得到有效的控
, 而且验证了支护理论的正确性.
关键词:全断面锚索支护;高预应力;强力锚索;动压巷道
中图分类号: 文献标识码:A
Highpretensionedstressandintensivecableboltingtechnologysetinfull
sectionandapplicationinentryaffectedbydynamicpressure
KANGHong-pu, LINJian, WUYong-zheng
(CoalMiningandDesigningBranch, ChinaCoalResearchInstitute, Beijing 100013, China)
Abstract:
andintensiveboltingtheory, itwasputforwardthatthehighpretensionedstressandintensivecableboltingwith
shorterlength, setinfullsectionandverticaltosurfaceofroadwaysisaneffectivesupportingtypetotheroadways
, plateandsteelmeshwere
-
bleboltswerepretensioned,
experimentofthefullsectionhighpretensionedstressandintensivecableboltingwascarriedoutinanentrydriven
closetoafacingworkingface, whichwasaffectedbytwiceviolentdynamicpressure, andessentialchangeswere
-to-sideconvergenceoftheentryisreducedabout90% compared
withtheformersupportingtype, theroofdelaminationisreducedtoalmostzero, andthedeformationofthesur-
, meanwhile, the
validityoft