本文選題：地質(zhì)構(gòu)造 + 發(fā)育規(guī)律�。� 參考：《西安科技大學(xué)》2017年碩士論文

【摘要】：韓城礦區(qū)地質(zhì)構(gòu)造復(fù)雜,地質(zhì)構(gòu)造對礦井安全生產(chǎn)的影響日益突出。因此,查清礦區(qū)地質(zhì)構(gòu)造的展布規(guī)律對煤炭開采具有重要意義。本文以幾何學(xué)構(gòu)造解析法為主要研究方法,全面分析了礦區(qū)地質(zhì)構(gòu)造的展布規(guī)律,取得了以下主要結(jié)論及成果:(1)礦區(qū)總體構(gòu)造格局是倒轉(zhuǎn)背斜的殘留翼,表現(xiàn)為一走向NE,傾向NW,被次級褶皺與斷裂構(gòu)造復(fù)雜化的單斜構(gòu)造。斷裂構(gòu)造與褶皺構(gòu)造均較發(fā)育,但在空間上差異明顯,總體具有“東西分帶,南北分塊;淺部復(fù)雜,深部簡單”的特點。斷裂構(gòu)造與褶皺構(gòu)造表現(xiàn)為“東強(qiáng)西弱、南強(qiáng)北弱”的特點;從斷裂構(gòu)造的發(fā)育形式看,南區(qū)以切層斷層為主,北區(qū)以層滑構(gòu)造為主,呈“南斷北滑”的特點。(2)礦區(qū)普遍發(fā)育區(qū)域性剪節(jié)理,NW向與NE向的剪節(jié)理構(gòu)成早期共軛剪節(jié)理系,近東西向與近南北向的剪節(jié)理構(gòu)成晚期共軛剪節(jié)理系,其中,近東西向和近南北向的剪節(jié)理最為發(fā)育。同時,區(qū)內(nèi)剪節(jié)理的發(fā)育方向與小斷層密集帶的展布方向較為一致。(3)礦區(qū)層滑構(gòu)造及與其密切相關(guān)的構(gòu)造煤廣泛發(fā)育,且具有明顯的分區(qū)性。北區(qū)多發(fā)育褶皺型層滑構(gòu)造,構(gòu)造煤分布廣、級別高;南區(qū)多發(fā)育斷裂型層滑構(gòu)造,構(gòu)造煤分布范圍相對較小、以原生結(jié)構(gòu)煤和低級別構(gòu)造煤為主。(4)褶皺構(gòu)造的組合型式以平行式為典型代表。斷層在平面上的組合型式以平行式、“入”字型、雁列式為主;在剖面上以階梯式、地壘式、地塹式為主,且疊瓦式組合型式僅在礦區(qū)邊淺部發(fā)育。(5)礦區(qū)地質(zhì)構(gòu)造形成于三個時期:印支期形成近東西向的縱彎褶皺、逆斷層及NE、NW向的剪裂面;燕山期形成NE向的縱彎褶皺、逆斷層及近東西、近南北向的剪裂面;喜山期形成大量正斷層。三期構(gòu)造相互限制、疊加和改造,使得礦區(qū)地質(zhì)構(gòu)造錯綜復(fù)雜。(6)依據(jù)礦區(qū)地質(zhì)構(gòu)造“東強(qiáng)西弱、南強(qiáng)北弱、南斷北滑”的發(fā)育特點,將礦區(qū)在東西向劃分為3個一級,南北向劃分為4個二級和4個三級構(gòu)造單元。
[Abstract]:The geological structure of Hancheng mining area is complex, and the influence of geological structure on mine safety production is increasingly prominent. Therefore, it is important for coal mining to find out the distribution of geological structure in mining area. In this paper, the distribution law of geological structure in mining area is analyzed comprehensively, and the main conclusions and results are as follows: (1) the overall tectonic pattern of mining area is the residual wing of inverted anticline. It is a monoclinal structure with a strike NE-trending to NW and complicated by secondary fold and fault structure. The fault structure and fold structure are developed, but there are obvious differences in space. They have the characteristics of "east-west zonation, north-south partitioning, shallow complexity and deep simplicity". The fault structure and fold structure are characterized by "the east is strong and the west is weak, the south is strong and the north is weak". (2) the early conjugate shear joints formed by the regional shear joints in NW and NE directions, and the shear joints in the near east-west direction and the near south-north direction constitute the late conjugate shear joints system. The shear joints near the east-west direction and the near-south-north direction are the most developed. At the same time, the development direction of shear joints in the area is consistent with the distribution direction of the small fault dense zone. (3) the strata slip structure and the closely related tectonic coal in the mining area are widely developed and have obvious zoning. There are many fold type stratigraphic slip structures in the north region with wide distribution and high grade of tectonic coal, while in the southern region there are many faulted types of layer-slip structures, and the distribution range of tectonic coal is relatively small. The primary structure coal and low grade structural coal are the main ones. (4) the combination type of fold structure is represented by parallel type. The combined types of faults in the plane are parallel, "entering" and geese, and in the section they are mainly of step type, crustal type and graben type. Moreover, the imbricate assemblage is only developed in the shallow part of the ore area. (5) the geological structure of the ore area was formed in three periods: the Indosinian formation of the nearly east-west bended fold, the reverse fault and the NENW shear face, and the Yanshanian formation of the NE longitudinal bend fold. Reverse faults and near east-west shear face near the north-south direction; a large number of normal faults were formed in the Himalayan epoch. Because of the mutual limitation, superposition and transformation of the third-stage structure, the geological structure of the mining area is complicated. (6) according to the developmental characteristics of the geological structure of the mining area, "the east is strong and the west is weak, the south is strong and the north is weak, and the south fault is north to north", the mining area is divided into three levels in the east-west direction. The south-north direction is divided into 4 secondary and 4 tertiary tectonic units.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P618.11

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