12036.渭北煤田地質(zhì)構(gòu)造發(fā)育規(guī)律研究

1、論文題目：渭北煤田地質(zhì)構(gòu)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(dǎo)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(jì)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(gòu)造特征及賦煤規(guī)律。本文在詳細(xì)分析渭北煤田地質(zhì)構(gòu)造發(fā)育特征和煤層賦存規(guī)律的基礎(chǔ)上，分別對(duì)聚煤前古構(gòu)造、同沉積構(gòu)造及聚煤后期構(gòu)造運(yùn)動(dòng)進(jìn)行研究，得出渭北煤田構(gòu)造發(fā)育特征，同時(shí)分析不同時(shí)期構(gòu)造運(yùn)動(dòng)對(duì)煤層賦存規(guī)律的影響，得出以下結(jié)論：（

2、1）古構(gòu)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(gòu)造帶從古構(gòu)造延續(xù)到同沉積構(gòu)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(gòu)造為主，東西兩側(cè)以褶皺構(gòu)造為主。由4個(gè)NE向和3個(gè)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(gòu)造格局。（5）構(gòu)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(gòu)造對(duì)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(guān)鍵詞：構(gòu)造規(guī)律構(gòu)造控煤渭北石炭二疊紀(jì)煤田研究類型：應(yīng)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.

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

10、hecombinationofstructurefmare“λ“shapedstructureechelonstructureladdershapedstructurehstgrabenimbricatedthrustetc.Constructionofburieddepththeoccurrenceofthecoalseamcoalqualityhaveinfluencemakecoalseambreakagestretchedthi