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1、DOI：10.13199/j.cst.2013.05.60.yinxw.016第41卷第5期煤炭科學(xué)技術(shù)Vol.41No.52013年5月CoalScienceandTechnologyMay2013淺埋深綜放工作面礦壓規(guī)律及支架工作阻力確定12311尹希文，朱拴成，安澤，薛吉勝，秦子晗(1.天地科技股份有限公司開采設(shè)計事業(yè)部，北京100013;2.煤炭科學(xué)研究總院，北京100013;3.北京工業(yè)職業(yè)技術(shù)學(xué)院，北京100013)摘要:針對淺埋深綜放工作面礦壓顯現(xiàn)劇烈、安全閥開啟頻繁的問題，對平朔井工三礦39107淺埋深綜放工作面支架工作狀況進(jìn)行分析研究。采用礦壓監(jiān)測系統(tǒng)現(xiàn)場實測液壓支架工作阻力
2、，得到工作面基本頂初次來壓步距為33.7m，平均周期來壓步距20.7m，周期來壓期間液壓支架循環(huán)末阻力平均為9700kN，安全閥開啟率平均為3.7%，工作面液壓支架初撐力水平整體較低，分析表明液壓支架存在3種不合理工作狀態(tài):安全閥調(diào)定壓力不合理，前后立柱受力不均衡，部分支架串液。結(jié)合現(xiàn)場實測數(shù)據(jù)進(jìn)行理論計算，得出39107工作面支架合理工作阻力應(yīng)不低于12000kN。關(guān)鍵詞:淺埋深;綜放工作面;支架工作阻力;礦壓顯現(xiàn);來壓步距中圖分類號:TD323文獻(xiàn)標(biāo)志碼:A文章編號:0253－2336(2013)05－0050－05MineStrataPressureLawofFullyMechanize
3、dTopCoalCavingMiningFaceinShallowDepthandDeterminationofWorkingResistanceforPoweredSupport12311YINXi-wen，ZHUShuan-cheng，ANZe，XUEJi-sheng，QINZi-han(1．MiningandDesignDepartment，TiandiScienceandTechnologyCompanyLtd．，Beijing100013，China;2．ChinaCoalResearchInstitute，Beijing100013，China;3．BeijingPolytechn
4、icCollege，Beijing100042，China)Abstract:Accordingtotheseriousminestratapressurebehaviorsofthefullymechanizedtopcoalcavingminingfaceinashallowdepthandthefrequentlyopenedproblemsofthesafetyvalve，ananalysisstudywasconductedontheworkingstatusofthehydraulicpoweredsupportsappliedinNo．39107fullymechanizedto
5、pcoalcavingminingfaceinashallowdepthofPingshuoNo．3UndergroundMine．Aminestratapressuremonitoringandmeasuringsystemwasappliedtothesitemeasurementoftheworkingresistancesofthepoweredsup-ports．Theinitialroofweightingstepdistanceofthecoalminingfacemeasuredwas33．7m，theaverageperiodicalroofweightingstepdis-
6、tancewas20．7m，theaveragecirculationresistanceofthepoweredsupportwas9700kNduringtheperiodicalroofweightingperiod，theaverageopenrateofthesafetyvalvewas3．7%andtheinitialsupportforceofthehydraulicpoweredsupportappliedtothecoalminingfacewaslowingeneral．Theanalysisshowedthattherewerethreeirrationalworking
7、statusesexistedinthehydraulicpoweredsupports．Thesetpressureofthesafetyvalvewasirrational，theloadingsofthefrontandreallegswerenotbalanceandthecrosssprinklingswereoc-curredinsomepoweredsupports．Incombin
