本文選題：構(gòu)造特征　切入點(diǎn)：孔隙特征　出處：《中國礦業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：本文在系統(tǒng)分析青龍礦井構(gòu)造特征及其發(fā)育規(guī)律的基礎(chǔ)上,通過主采煤層16號、18號煤不同類型構(gòu)造煤宏、微觀變形特征分析和鉆孔測井曲線煤體結(jié)構(gòu)類型的判識,結(jié)合區(qū)域構(gòu)造特征及其演化分析,探討了青龍煤礦構(gòu)造煤發(fā)育、分布特征及構(gòu)造控制作用;通過典型構(gòu)造煤樣品的壓汞實(shí)驗(yàn)測試,分析了不同類型構(gòu)造煤的孔隙結(jié)構(gòu)特征;結(jié)合煤層瓦斯含量數(shù)據(jù)分析,深入探討了青龍煤礦瓦斯賦存特征及其影響因素。取得了以下主要成果和認(rèn)識:(1)青龍礦含煤地層自形成以后主要經(jīng)歷了印支期、燕山期和喜馬拉雅期三期構(gòu)造演化,印支期近NS向擠壓,主要形成一些近EW向的小型褶皺,在持續(xù)的擠壓下,形成一系列的逆斷層;燕山期NW-SE向擠壓構(gòu)造運(yùn)動奠定了礦井構(gòu)造格架,礦區(qū)內(nèi)廣泛發(fā)育NE-SW向逆斷裂及褶皺,同時改造了印支期EW向構(gòu)造,使得構(gòu)造線走向發(fā)生一定的偏轉(zhuǎn);喜馬拉雅期NE-SW向擠壓作用,最為突出的特征是使燕山期NE向逆斷層轉(zhuǎn)變?yōu)檎龜鄬有再|(zhì)。(2)青龍礦構(gòu)造煤發(fā)育較為強(qiáng)烈和普遍。通過構(gòu)造煤宏、微觀變形特征分析,將構(gòu)造煤劃分為碎裂煤、碎斑煤、碎粒煤、片狀煤、鱗片煤、揉皺煤和糜棱煤等7種類型,通過測井曲線判識將16、18號煤層煤體結(jié)構(gòu)劃分為I類原生結(jié)構(gòu)煤、Ⅱ類弱變形構(gòu)造煤和Ⅲ類強(qiáng)變形構(gòu)造煤三類,I類為原生結(jié)構(gòu)煤,Ⅱ類為碎裂煤,Ⅲ類為碎斑煤、碎粒煤、片狀煤、鱗片煤、揉皺煤和糜棱煤等。通過對16、18號煤層煤體結(jié)構(gòu)進(jìn)行測井判識和分層定厚,分析了構(gòu)造煤分布規(guī)律,深入剖析了不同類型、不同性質(zhì)構(gòu)造對構(gòu)造煤發(fā)育的控制作用。(3)通過構(gòu)造煤樣的壓汞實(shí)驗(yàn),分析了不同類型構(gòu)造煤孔隙特征、孔徑結(jié)構(gòu)演化和孔隙形態(tài)及連通性變化特征,探討了構(gòu)造煤結(jié)構(gòu)與孔隙結(jié)構(gòu)特征的內(nèi)在聯(lián)系。(4)深入探討了影響青龍礦構(gòu)造煤及瓦斯非均質(zhì)性分布地質(zhì)因素,通過礦井構(gòu)造、煤層頂板巖性、煤層埋藏深度、煤變質(zhì)程度、煤巖組分和水文地質(zhì)條件等分析,得出礦井構(gòu)造是瓦斯的非均質(zhì)性分布的主控地質(zhì)因素。
[Abstract]:On the basis of systematic analysis of the structural characteristics and development law of Azure Dragon coal mine, this paper analyzes the characteristics of macro and microscopic deformation of different types of structural coal in coal seam No. 16 and No. 18 in main mining seam, and identifies the structural types of coal body in borehole logging curve. Based on the analysis of regional structural characteristics and evolution, the development, distribution and tectonic control of tectonic coal in Azure Dragon coal mine are discussed, and the pore structure characteristics of different structural coals are analyzed through mercury injection test of typical structural coal samples. Based on the analysis of coal seam gas content data, the characteristics of gas occurrence and its influencing factors in Azure Dragon coal mine are discussed in depth. The following main achievements and understanding have been achieved and the coal bearing strata in the Azure Dragon mine have mainly experienced the Indosinian period since the formation of the coal-bearing strata. During the Yanshanian and Himalayan periods, the tectonic evolution of the third stage, the Indosinian period near NS compression, mainly formed some near EW direction of small folds, under continuous compression, forming a series of reverse faults; The Yanshanian NW-SE compressional tectonic movement laid the framework of the mine structure, and the NE-SW reverse faults and folds were widely developed in the mining area. At the same time, the Indosinian EW trending structure was reformed, which made the tectonic line strike deflected to a certain extent, and the Himalayan NE-SW compressional process occurred. The most prominent feature is that the tectonic coal of Azure Dragon mine developed strongly and generally from NE to normal fault in Yanshanian period. Based on the analysis of tectonic coal macro and microscopic deformation characteristics, the tectonic coal is divided into cracked coal, fragmentary coal and granular coal. There are 7 types of flake coal, flake coal, crumpled coal and mylonian coal. The coal body structure of coal seam 16,18 is divided into I type primary structure coal, 鈪，

本文編號：1567657