下溝礦二次動(dòng)壓巷道高預(yù)應(yīng)力支護(hù)技術(shù)研究.pdf

1、論文題目：下溝礦二次動(dòng)壓巷道高預(yù)應(yīng)力支護(hù)技術(shù)研究工程領(lǐng)域：礦業(yè)工程碩士生：李國平（簽名）指導(dǎo)教師：柴敬（校內(nèi)）（簽名）指導(dǎo)教師：何萬盈（校外）（簽名）摘要下溝煤礦自2001年技改以來，積極推行煤巷錨桿支護(hù)技術(shù)，100%實(shí)現(xiàn)了錨網(wǎng)支護(hù)，經(jīng)過十幾年的技術(shù)積累，已經(jīng)能熟練掌握一般條件下的巷道錨桿支護(hù)技術(shù)。但是隨著開采深度和開采強(qiáng)度的加大，出現(xiàn)了孤島工作面、與回采面對穿巷道和復(fù)用巷道等復(fù)雜困難巷道，原有技術(shù)難以維護(hù)這些復(fù)雜困難巷道，巷道出現(xiàn)了局

2、部變形以及漏頂?shù)默F(xiàn)象，對礦工的生命安全形成了較大的威脅，嚴(yán)重影響安全生產(chǎn)。綜合以上情況分析，為保障礦井安全順利生產(chǎn)，本研究將對原有下溝礦煤層巷道錨桿支護(hù)方案進(jìn)行分析，并找到合理支護(hù)方案。本次研究在理論分析的基礎(chǔ)上，結(jié)合下溝礦地質(zhì)條件和ZF4404工作面的現(xiàn)狀，進(jìn)行了大量的現(xiàn)場試驗(yàn)，掌握了煤層巷道圍巖的相關(guān)力學(xué)參數(shù)和礦壓分布規(guī)律的特征，確定了高預(yù)應(yīng)力強(qiáng)力支護(hù)的相關(guān)支護(hù)參數(shù)，依靠Flac3d數(shù)值模擬軟件，對錨桿支護(hù)方案的巷道圍巖的塑性區(qū)與應(yīng)

3、力分布和豎直方向上的巷道位移狀態(tài)做了模擬分析。結(jié)合現(xiàn)場的施工、監(jiān)測和詳細(xì)的技術(shù)經(jīng)濟(jì)分析，以此確定高預(yù)應(yīng)力錨桿支護(hù)技術(shù)適應(yīng)下溝礦的巷道條件，驗(yàn)證了本次錨桿支護(hù)方案的安全性。關(guān)鍵詞：二次動(dòng)壓；高預(yù)應(yīng)力；Flac3d數(shù)值模擬；錨桿支護(hù)研究類型：應(yīng)用研究Subject：ResearchonTwoDynamicPressureRoadwayHighPrestressedSupptingTechnologyofXiagouMineSpecialty

4、：MiningEngineeringName：LiGuoping（Signature）Instruct：ChaiJing（Signature）Instruct：HeWanying（Signature）ABSTRACTTheditchcoalminesince2001technologicalupgradingactivelyimplementthecoalroadwayboltingtechnology100%implementatio

5、noftheanchsupptaftermethantenyearsoftechnologyaccumulationhasbeenskillfullymasteredthetechnologyofroadwayunderboltsupptgeneralconditions.Butwiththeincreaseofminingdepthintensityofexploitationtheemergenceofisolatedwkingfa

6、ceminingfaceroadwaywearreusecomplexdifficulttunneltheiginaltechnologyisdifficulttomaintainthesedifficultroadwayroadwayappearedinthelocaldefmationroofcavingroofleakagephenomenonhasfmedabigthreattotheminewkerssafetyserious

7、lyaffectthesafeproduction.Basedontheaboveanalysisindertoguaranteethesmoothproductionofminesafetyunderthisstudywillbetheiginalmineseamroadwayboltingschemeisanalyzedfindthereasonablesupptingscheme.Onthebasisoftheeticalanal

8、ysiscombinedwiththeXiagouminegeologicalconditionspresentsituationofZF4404wkingfacealargenumberoffieldtestsgrasptheacteristicsofrelevantmechanicalparametersofsurroundingrockincoalseamroadwayminingpressuredistributiondeter

9、minedthestrengthprestressedsupptingrelevantsupptingparametersrelyontheFlac3dnumericalsimulationsoftwaretheboltsupptingofroadwaysurroundingrockthesupptingschemeofplasticzonestressstateofroadwaydisplacementfcedistributiont

10、heverticaldirectiondidsimulationanalysis.Combiningtheanalysisofconstructionsitemonitingdetailedtechnicaleconomicindertodeterminethehighprestresstechnologyofboltsupptinroadwayconditionstoadapttoditchmineverifythesafetyoft