极近距离煤层变厚度顶板下部回采巷道综合控制技术.pdf

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1、第25卷第11期中国矿业Vo1．25，No．112016年i1月CHINAMININGMAGAZINENOV．2O16菜选技术极近距离煤层变厚度顶板下部回采巷道综合控制技术郑仰发，张剑，林健，李中伟，李建波(1．天地科技股份有限公司开采设计事业部，北京100013；2．煤炭科学研究总院开采研究分院，北京1OOO13)摘要：针对三交河矿极近距离煤层采空区下变厚度顶板下部煤巷布置及合理支护的技术难题，通过上部残留煤柱应力扩散分析与提高掘采回收效率考量，确定601首采面两巷采用反向大错距的布置方案。在开展现场巷道顶板窥视、锚固力测试与预紧扭矩转化试验的

2、基础上，提出了适应不同地质条件的煤巷差异化支护方案：架棚一锚杆联合支护、锚杆一锚索支护及锚杆一钢带～锚索支护。在井下实施了两条回采巷道的全进尺支护示范，监测结果表明：掘巷期间锚杆锚索工作载荷快速稳定，预紧力设计合理，围岩最大变形量30mm；回采期间超前巷道顶板最大下沉93mm。相关回采巷道综合控制技术保障了近距离下部煤层的安全高效开采。关键词：极近距离煤层；巷道布置；锚杆支护；变形监测中图分类号：TD353文献标识码：A文章编号：1004—4051(2016)II-107—05Thecombinedcontroltechnologyofminin

3、groadwayundervariablethicknessroofofultra-closeseamsZHENGYang—fa，ZHANGJian，LINJian，LIZhong—wei，LIJian-bo’(1．MiningandDesigningDepartment，TiandiScienceandTechnologyCo．，Ltd．，Beijing100013，China；2．MiningResearchBranch，ChinaCoalResearchInstitute，Beijing100013，China)Abstract：Aimin

4、gattechnicalproblemsoflowercoalroadwayarrangementandtheappropriatesupportwithvariablethicknessroofunderultra—closeseamsgoalinSanjiaohecolliery，throughstressdistributionanalysisoftheupperresidualcoalpillarandconsiderationofimprovingminingrecoveryefficiency，thetworoadwaysof601m

5、iningworkfacearelocatedwiththelayoutschemeofreverselongdistance．Basedontheon—siteroadwayroofpeeping，anchorageforcetestandsettingtorquetransformationtest，differentsupportprogramsareproposedforadaptingdifferentgeologicalconditionsincoalroadway：combinedsupportwithsteelshedandanc

6、horbolt，anchorbolt—cablesupportandanchorbolt—steelstrip—cablesupport．Intheimplementationdemonstrationoftwoundermineroadwayssupportwithfullexcavatingfootage，monitoringresultsshowthat：anchorboltsworking—loadturnedstablefast，thepretensiondesignedrationally，withthemaximumamountof

7、surroundingrockdeformationof30mmduringdrivingperiod；andduringminingperiod，proheadroadwaysectiondeformedwiththemaximumamountofroofsubsidenceof93mm．Therelatedcoalroadwayintegratedcontroltechnologyguaranteesthesafeandefficientminingonthelowerportionoftheclosecoalseams．Keywords：u

8、ltra-closeseams；roadwaylayout；boltingsupport；deformationmonitoring近距