基于锚杆支护系统允许的巷道顶板离层临界值的确定方法林健

12111.1000132.271100。。TD327.2A1006-6225201405-0047-04DeterminationMethodforCriticalValueofＲoofSeparationLimitedbyAnchoredBoltSupportingSystemLINJian1MAKai-chun2YANGJing-he1FANMing-jian11.CoalMining＆DesigningDepartmentTiandiScience＆TechnologyCo.Ltd.Beijing100013China2.XinwenMiningWorkersCollegeLaiwu271100ChinaAbstractDeterminingthecriticalvalueofroofseparationisalwaysadifficultsafetyproblemforcoalindustry.Thetypicaldeterminingmethodconsideringroadwayandminingconditionabandonedanewmethodlimitedbyallowabledeformationofanchoredboltsupport-ingsystemwaspresent.Onthebasisoflaboratorytestandon-the-spotobservationcriticalvaluesofroofseparationunderdifferentan-choredboltlengthsandanchoragemannerswereobtained.Keywordsanchoredboltsupportingsystemroofseparationcriticalvalue2014－03－28DOI10.13532/j.cnki.cn11－3677/td.2014.05.0142012BAK04B062012BAB13B021969－。.J.201419547－50.。。。。。1/100。。2400mm1/10024mm125.4mm。、、、1。2%1.5%。、、、、、1－9。74195120201410COALMININGTECHNOLOGYVol.19No.5SeriesNo.120October2014。。。。。1、10。1.1。。。1.2、、。、。。。。1.3、、。、、、、。。1、。211。、。3、。、。2、、。2.12。1。1/%/%/%/MPa/MPa5002.7815.6023.9594.4757.90.78Q3352.3419.4830.9402.6606.30.665002.4217.6425.8532.9713.20.755002.4614.1022.6584.5710.00.83600－9.5022.0666883－600－9.0022.0670880－600－10.0022.5664879－5002.1815.5823.7623.9782.10.80。、。Q33519.48%500MPa15.73%500MPa14.1%600MPa9.5%。。2.2。MCB33Conebolt8412020145120mmＲoofex80kN300mm130～200kN1000mm。2.3、12。。2.4。5002。2500/kN406080100120/mm2.684.015.356.698.035005.368.0210.7013.3816.0610006.439.6212.8416.0619.28120033.1。Δub=l－l1－laδ－P0SbEΔubmmlmml1mmlammδ。500MPaδ=8%P0kNSbmm2EMPa。。l=2400mml1=100mmla=400mm22mm50kN1Δub=152mm。500MPa3。3.2、3/mm/mm160088180010420001202200136240015213。。1/3。5008%1/3。Δub=l－l16δl=2400mml1=100mmΔub=30.7mm。500MPa4。4/mm/mm160020.0180022.7200025.3220028.0240030.73.3。14。。5500MPa。5/mm/mm160066.7180076.0200085.3220094.72400104.0494201457、、、、、7、、、、、110mm13%10～50mm56%50～100mm11%100mm20%10mm43%10～50mm41%50～100mm11%100mm5%89%11%。39%61%11。210mm15.3%10～50mm66.3%50～100mm12.3%100mm6.1%10mm37.8%10～50mm48%50～100mm6.1%100mm8.1%81.6%18.4%。60.2%39.8%。75%。500MPa6。6/mm/mm/mm/mm/mm/mm/mm1600886666.75020.01518001047876.05722.71720001209085.36425.319220013610294.77128.0212400152114104.07830.72351。2、、。。。3。1.J.200012S58－61.2.J.201035111827－1831.3.J.20053110－112.4.J.20112252－257.5.J.20063.6.J.2001427－29.7.J.20075.8.J.2002355－58.9.J.2007629－31.10.M.2007.11.J.200813586－89.12.J.2011391127－3035.13.J.2008337721－726.14.J.201116459－62.檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾檾殧殧殧殧[e-mail]//mkkc．cbpt．cnki．nethttp//c．wanfangdata．com．cn/Periodical－mkkc．aspx0512020145