厚煤层分层充填开采覆岩运移特征相似模拟*魏廷双1，缪建华1，李志华2，姬健帅2，陈卫1（1.淮南矿业集团潘二煤矿，安徽淮南232096；2.安徽理工大学矿业工程学院，安徽淮南232001）摘要：针对潘四东矿工业广场下3煤拟采用膏体充填开采提升煤炭采出率，采用相似模拟相试验对比分析了厚煤层分层垮落法开采和分层充填法开采矿压显现和覆岩运移特征。研究结果表明：分层垮落法开采上分层开挖后裂隙带发育高度52m，下分层开挖后裂隙带发育高度达到79.6m，约为采高的17倍左右；分层充填法开采覆岩只形成裂隙带和弯曲下沉带，并未出现明显的初次来压与周期来压，且裂隙发育程度更小；上分层开挖后，垮落法开采地表最大下沉量0.6m，充填法开采地表最大下沉量0.11m，充填法为垮落法开采的18.3%；下分层开挖后，垮落法开采地表最大下沉量2.8m，充填法开采地表最大下沉量0.18m，充填法为垮落法的6.4%。厚煤层分层充填开采能有效控制上覆岩层移动，显著降低地表沉陷。关键词：充填开采；分层开采；地表沉陷；相似模拟试验；厚煤层中图分类号：TD325文献标志码：A文章编号：1008－8725（2023）02－014－05SimilarSimulationonMovementCharacteristicofOverlyingStratawithSlicingBackfillMininginThickCoalSeamWEITingshuang1,MIAOJianhua1,LIZhihua2,JIJianshuai2,CHENWei1(1.PanjiNo.2CoalMine,HuainanMiningGroup,Huainan232096,China；2.SchoolofMiningEngineering,AnhuiUniversityofScienceandTechnology,Huainan232001,China)Abstract：Inordertoimprovethecoalrecoveryratethepastebackfillminingwasusedfor3coalseamunderindustrialsquareinPanjiNo.4eastcoalmine.Thesimilarsimulationtestwasappliedtostudythecharacteristicofundergroundpressurebehaviorandoverlyingstratamovement.Theresultsshowedthat:withtheslicingcavingmining,thedevelopmentheightoffracturezoneis52mduringminingthetopslicing,thedevelopmentheightoffracturezoneis79.6mduringminingthelowslicing,whichisapproximately17timeshigherthanminingheight;withtheslicingbackfillmining,thefracturezoneandbendingsubsidencebeltareformedonlyinoverlyingstrata,thefirstweightingandtheperiodicweightingarenotsignificant,thedevelopmentheightoffracturezoneislower;whenminingthetopslicing,themaximumsubsidenceis0.6mbycavingmethod,whilethemaximumsubsidenceis0.11mbyb...
