浅埋深综放工作面矿压规律及支架工作阻力确定

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1、DOI：10.13199/j.cst.2013.05.60.yinxw.016第41卷第5期煤炭科学技术Vol.41No.52013年5月CoalScienceandTechnologyMay2013浅埋深综放工作面矿压规律及支架工作阻力确定12311尹希文，朱拴成，安泽，薛吉胜，秦子晗(1.天地科技股份有限公司开采设计事业部，北京100013;2.煤炭科学研究总院，北京100013;3.北京工业职业技术学院，北京100013)摘要:针对浅埋深综放工作面矿压显现剧烈、安全阀开启频繁的问题，对平朔井工三矿39107浅埋深综放工作面支架工作状况进行分析研究。采用矿压监测系统现场实测液压支架工作阻力

2、，得到工作面基本顶初次来压步距为33.7m，平均周期来压步距20.7m，周期来压期间液压支架循环末阻力平均为9700kN，安全阀开启率平均为3.7%，工作面液压支架初撑力水平整体较低，分析表明液压支架存在3种不合理工作状态:安全阀调定压力不合理，前后立柱受力不均衡，部分支架串液。结合现场实测数据进行理论计算，得出39107工作面支架合理工作阻力应不低于12000kN。关键词:浅埋深;综放工作面;支架工作阻力;矿压显现;来压步距中图分类号:TD323文献标志码:A文章编号: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