12036.渭北煤田地質(zhì)構造發(fā)育規(guī)律研究

1、論文題目：渭北煤田地質(zhì)構造發(fā)育規(guī)律研究專業(yè)：地質(zhì)工程碩士生：王超平（簽名）指導教師：夏玉成（簽名）摘要隨著煤炭資源開采速度的加快，渭北石炭二疊紀煤田面臨資源枯竭，開采地質(zhì)條件惡化的局面；為滿足高效生產(chǎn)，需深入研究構造特征及賦煤規(guī)律。本文在詳細分析渭北煤田地質(zhì)構造發(fā)育特征和煤層賦存規(guī)律的基礎上，分別對聚煤前古構造、同沉積構造及聚煤后期構造運動進行研究，得出渭北煤田構造發(fā)育特征，同時分析不同時期構造運動對煤層賦存規(guī)律的影響，得出以下結論：（

2、1）古構造及古植物條件，決定了晚石炭世才形成良好的聚煤環(huán)境。（2）中央古隆起及38構造帶從古構造延續(xù)到同沉積構造，使鄂爾多斯盆地晚古生代煤層聚集規(guī)律具有東西分帶、南北分區(qū)的現(xiàn)象。（3）受中央古隆起的影響，渭北煤田基底總體沉降幅度及含煤性皆以韓城礦區(qū)最好，澄合礦區(qū)次之，蒲白和銅川礦區(qū)最差。（4）渭北煤田中部以斷裂構造為主，東西兩側以褶皺構造為主。由4個NE向和3個近EW向斷層密集帶互相交織并向煤田中部收斂，形成渭北煤田構造格局。（5）構造

3、的組合形式有“入”字型、雁列式、階梯狀、地壘、地塹及疊瓦式逆斷層等。構造對煤層的埋深、產(chǎn)狀、煤質(zhì)等均有影響；常使煤層發(fā)生斷失、拉伸變薄，影響煤礦安全生產(chǎn)。關鍵詞：構造規(guī)律構造控煤渭北石炭二疊紀煤田研究類型：應用研究Subject:TheResearchofDevelopmentRegularitiesofGeologicalStuctureinWeibeiCoalfieldSpecialty:GeologicalEngineeringN

4、ame:WangChaoping（Signature）Instruct:XiaYucheng（Signature）ABSTRACTWiththespeedingupofthecoalresourcesminingspeedWeibeiPCcoalfieldfacingresourcedepletiondeteriationofmininggeologicalconditionsToachieveefficientproductionit

5、isnecessarytofurtherstudyoftectonicacteristicslawofcoal.ThispaperanalysesthebasicacteristicslawofcoalofgeologicalstructuraldevelopmentonWeibeicoalfieldstudyonpalaeostructuresyndepositionalstructuresthelatetectonicmovemen

6、twkoutthestructuredevelopmentacteristicsofWeibeicoalfieldanalysisofdifferentperiodstectonicmovementinfluenceoncoalseamoccurrenceregularitythefollowingconclusions:(1)Ancientstructuresplantconditionsdeterminethelatecarboni

7、ferousepochtofmagoodcoalaccumulatingenvironment.(2)Thecentralpaleouplift38Nstructuralbetfrompaleostructuralcontinuetosyndepositionalstructuresmakethedosbasininthelatepalaeozoiccoalaccumulationzoningthephenomenonofthenth.

8、southpartition.(3)InfluencedbytheancientupliftWeibeicoalfieldbaseoverallsettlementamplitudecoal.bearingpropertiesarebestminingareainSeoulchengchengclosesecondminingareathePopetongchuanminingareaisthewst.(4)InWeibeicoalfi

9、eldinthedlepartofthemainfaultsthingsonbothsidestofold.By4NE.trendingfaultconcentratedbet3EW.trendingfaultconcentratedbetinterweaveeachothertothecoalfieldincentralconvergencefmapatternofcoalfieldstructureofweiheriver.(5)T

10、hecombinationofstructurefmare“λ“shapedstructureechelonstructureladdershapedstructurehstgrabenimbricatedthrustetc.Constructionofburieddepththeoccurrenceofthecoalseamcoalqualityhaveinfluencemakecoalseambreakagestretchedthi