矿产普查与勘探西铭井田陷落柱发育特征与分布规律研究

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1、删工大学硕士学位舣r37r龆2s摘要、7陷落柱是煤系下伏灰岩中的溶洞发生持续向上的塌陷所产生的柱状地质体，是中国特有的一种岩溶地质现象。西铭井田陷落柱十分发育，已成为影响煤矿生产的重要因素。7本文运用构造地质学、水文地质学和岩溶学的理论和方法，通过地面地质调查、采掘工作面地质编录，对陷落柱的发育特征进行了较为深入的研究■1滗者认真总结了西铭井田长期开采积累的陷落柱资料，对该井田陷落柱分布规律进行了精细的研究。在对不同煤层陷落柱分布密度定量化分区的基础上，首次提出在横向上和垂向上预测陷落柱分布密度的原理与方法。本文成果对采煤疋作面合理布置具有

2、指导意义，也有助于陷落柱研究的进一步深化。)【关键词】陷落柱发育特征分布密度西铭井田SongXiaoxia’Sthesisformaster’Sdegree—ThemorphologyanddistributionofcollapsepillarsincoalmeasuresinXimiogMine．Taiyuan，ChinaAbstractThecollapsepillaroccurredincoalmeasuresofChinaiSapillar—shapedbrecciabodyoriginatedfromthecollapseofc

3、oalmeasuresandotherstratathatoverliethecavesindissolvablelimestonesequenceSofarthiskindofburiedkarstphenomenonhasnotbeendocumentedinotherpartsoftheworld．Thecollapsepillarsarealsoanimportantkindofbarrierstoobstructthelong．wallmechanizedmining．Morethan500ofcollapsepillarsdev

4、elopedinanareaof43Km2ofXimingCoalMine，Taiyuan，China，havebeeninvestigatedfromthesurfaceoutcropsandtheminingfaceswitllinseveralcoalseams．Theirmorphology,spatialdistribution，geologicalcharacteristics，geneticmechanismanddistributionpredictionaredescribedanddiscussedinthispaper

5、fromtheviewofstructuralgeology,hydrogeology,karstologyandcollapsepillarmorphology．Theresultsshowthattheheightofcollapsepillarsintheminechangesfrom10to500m，mostofthemintherangeof100．160m．withthediametersof20to60m；thenumberdensityfnumbers／Km21ofcollapsepillarsint11eCarbonife

6、rous—Permiancoalmeasureintheminechangesfrom1to100／Km2．withadensityofl0—20／Km2generally．Thearrangementofcollapsepillarsuncoveredin8撑seam．inthe4“panelindicatestheexistenceofanetworkofcavesystemintheunderlyingCumbrian—Ordovicianlimestonesequence．Thecomparisonofthenumberdensit

7、yofcollapsepillarsuncoveredin2拌seamwith8撑seamthatis100mbelow2#seamrevealsthatapredictionofcollapsepillarsinthelowerunworkedCOalseamcanbemadefromthedataofupperworkedseam．InthecaseofXimingCoalMine，thisauthorproposearelationshipofD8-2．27D2，hereD8andD2arethenumberdensityin8#an

8、d2#．forpredictingthenumberdensityofcollapsedpillarsin8#seamfrom2#seam．Thisresearchwillben