本文選題：褶皺構(gòu)造 + 構(gòu)造煤��； 參考：《中國(guó)礦業(yè)大學(xué)》2016年碩士論文

【摘要】：在系統(tǒng)研究新景煤礦褶皺發(fā)育特征及組合規(guī)律的基礎(chǔ)上,闡明了褶皺形成與演化過(guò)程;基于井下觀測(cè)、鉆孔編錄及測(cè)井解譯,分析了構(gòu)造煤發(fā)育特征,探討了褶皺對(duì)構(gòu)造煤發(fā)育的控制作用;利用壓汞實(shí)驗(yàn)研究了不同類(lèi)型構(gòu)造煤的孔隙結(jié)構(gòu)特征,分析了不同類(lèi)型構(gòu)造煤的瓦斯運(yùn)移與賦存特性,同時(shí)分析了褶皺控制下瓦斯的保存環(huán)境,揭示了褶皺對(duì)瓦斯賦存的控制機(jī)制,取得以下成果和認(rèn)識(shí):(1)研究區(qū)主要發(fā)育變形較弱的開(kāi)闊褶皺,軸向分為NNE~NE向、近EW向和NW向3組,其中NNE~NE向褶皺控制礦井主體形態(tài);褶皺疊加型式有穹窿、盆形及馬鞍狀等,褶皺組合樣式有斜列狀、梯狀、帚狀、柵欄狀、網(wǎng)格狀和紡錘狀等;總結(jié)出礦井褶皺具有分區(qū)性、分期性、方向性、規(guī)模一致性、對(duì)稱(chēng)性及等距性等發(fā)育規(guī)律;提出礦井褶皺均是由縱彎褶皺作用形成的,印支期形成規(guī)模較小、軸向近EW向的寬緩褶皺,燕山期形成NNE~NE向大型褶皺,喜馬拉雅期改造了早期褶皺并形成近NW向的小型褶皺。(2)礦井主要發(fā)育變形較弱的脆性變形系列構(gòu)造煤;從原生結(jié)構(gòu)煤到揉皺煤,煤體強(qiáng)度逐漸減小、變形程度逐漸增強(qiáng)、摩擦面越來(lái)越發(fā)育、裂隙發(fā)育程度不斷增高,所受應(yīng)力作用也趨于復(fù)雜化;認(rèn)為在褶皺變形復(fù)雜的相關(guān)構(gòu)造部位以及小斷層、大型節(jié)理、沖蝕帶附近構(gòu)造煤較為發(fā)育,且多數(shù)區(qū)段煤層下部較上部構(gòu)造煤更為發(fā)育,進(jìn)而提出了褶皺控制構(gòu)造煤發(fā)育的6種模式;并得到了構(gòu)造煤發(fā)育程度隨褶皺變形程度的增大而增強(qiáng)的認(rèn)識(shí)。(3)從原生結(jié)構(gòu)煤到碎粒煤瓦斯運(yùn)移和賦存能力隨變形程度增大而增強(qiáng);從片狀煤到揉皺煤隨變形程度增大瓦斯運(yùn)移能力先顯著增強(qiáng)后有所減弱,但賦存能力呈顯著增強(qiáng)趨勢(shì)。新景礦褶皺構(gòu)造對(duì)瓦斯運(yùn)移與賦存具有重要控制作用;從褶皺變形程度差異造成不同類(lèi)型構(gòu)造煤差異分布、褶皺疊加復(fù)合形成變形較強(qiáng)的構(gòu)造煤、褶皺作用形成伴生斷層、伴生節(jié)理以及造成煤層頂板差異性破壞5個(gè)方面闡述了褶皺對(duì)瓦斯賦存的控制機(jī)制,提出褶皺主要通過(guò)控制構(gòu)造煤的發(fā)育以及煤層頂板差異性破壞進(jìn)而控制瓦斯賦存的新認(rèn)識(shí)。
[Abstract]:On the basis of systematic study of fold development characteristics and assemblage law in Xinjing Coal Mine, the formation and evolution of folds are expounded, and the characteristics of tectonic coal development are analyzed based on downhole observation, borehole cataloguing and log interpretation. The controlling effect of folds on the development of tectonic coal is discussed, the pore structure characteristics of different types of structural coal are studied by mercury injection experiment, and the gas migration and occurrence characteristics of different types of structural coal are analyzed. At the same time, the gas preservation environment under fold control is analyzed, and the control mechanism of fold on gas storage is revealed. The following results and understanding are obtained. The main open folds with weak deformation are developed in the study area. The axial direction is divided into three groups: NNE-NE direction, near EW direction and NW direction. Among them, NNE-NE fold controls the main shape of mine, fold superposition pattern includes dome, basin shape and saddle shape, fold combination style includes oblique, ladder, broom, palisade, grid and spindle-shaped, etc. It is concluded that mine fold is zonal. It is pointed out that the mine fold is formed by longitudinal bending fold, the Indosinian epoch is small in scale, and the axial direction is near EW direction. In Yanshanian period, NNE-NE-trending large folds were formed, and in Himalayan period, the early folds were reformed and formed near NW direction small folds. The coal mine mainly developed brittle deformed series of tectonite coal with weak deformation, and from primary structure coal to crumpled coal, the strength of coal body gradually decreased. The degree of deformation is gradually increasing, the friction surface is more and more developed, the degree of crack development is increasing, and the stress action is becoming more and more complicated. The tectonic coal near the erosion zone is relatively developed and the lower part of the coal seam is more developed than the upper tectonic coal in most sections. Six models of fold controlling the development of tectonic coal are put forward. The understanding that the development degree of tectonic coal increases with the increase of fold deformation degree. (3) the migration and storage ability of gas from primary structure coal to granular coal increases with the increase of deformation degree. From flake coal to crumpled coal, with the increase of deformation degree, the gas migration capacity first increased significantly and then weakened, but the storage capacity increased significantly. The fold structure in Xinjing Mine plays an important role in controlling the gas migration and occurrence, the different distribution of different types of tectonic coal is caused by the difference of fold deformation degree, the fold superposition composite forms the tectonic coal with strong deformation, and the fold process forms the associated fault. In this paper, the control mechanism of fold on gas occurrence is expounded from five aspects of associated joint and difference destruction of coal seam roof, and a new understanding that fold control gas occurrence mainly by controlling the development of tectonic coal and the difference destruction of coal seam roof is put forward.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：TD712.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李春昱 ,王荃 ,張之孟 ,劉雪亞;中國(guó)板塊構(gòu)造的輪廓[J];中國(guó)地質(zhì)科學(xué)院院報(bào);1980年00期

，

本文編號(hào)：2027676