本文選題：構(gòu)造演化 + 斷層組合��； 參考：《安徽理工大學(xué)》2015年碩士論文

【摘要】：新集礦區(qū)位于華北板塊淮南復(fù)向斜南翼,區(qū)內(nèi)地質(zhì)構(gòu)造發(fā)育程度復(fù)雜。F10正斷層是礦區(qū)落差最大、切割煤層最多的煤系內(nèi)斷層,對(duì)巷道布置、回采順序部署、煤與瓦斯突出防治等礦井地質(zhì)工作的開展都有著重要影響。通過資料分析、工程鉆探、室內(nèi)測(cè)試、原位試驗(yàn)等手段,對(duì)礦區(qū)的斷層演化特征、斷層帶巖體工程力學(xué)性質(zhì)、斷層泥特性和區(qū)域地應(yīng)力場(chǎng)特征等進(jìn)行分析研究,深刻地揭露F10斷層的性質(zhì)和演化規(guī)律,對(duì)礦區(qū)生產(chǎn)工作部署和地質(zhì)災(zāi)害防治具有借鑒意義。 從區(qū)域構(gòu)造背景和構(gòu)造發(fā)育特征出發(fā),探討了大構(gòu)造背景下礦區(qū)正斷層演化的一般性特征,F10斷層經(jīng)歷了印支運(yùn)動(dòng)、燕山運(yùn)動(dòng)和喜山運(yùn)動(dòng)三期不同方向、不同性質(zhì)的構(gòu)造運(yùn)動(dòng)改造,斷層性質(zhì)上表現(xiàn)出一定的復(fù)雜性與特殊性。結(jié)合勘探資料,揭露了F10斷層的形態(tài)發(fā)育特征,附近正斷層較發(fā)育,但大多表現(xiàn)為逆斷層性質(zhì),因礦區(qū)處在南北向?qū)_推覆的前陸地帶,傾向北的反向斷層和寬緩褶曲較為發(fā)育,區(qū)內(nèi)小斷層走向統(tǒng)計(jì)主要分為NEE和SEE向共軛的兩組。測(cè)試了斷層帶巖體的物理力學(xué)性質(zhì),分析了斷層泥的級(jí)配特征、分形特征以及斷層泥中粘土礦物成分、含量等,斷層泥總體級(jí)配良好,粒徑分布不均,粘粒含量平均占22.7%；泥質(zhì)物中粘土礦物主要有高嶺石、伊蒙混層以及少量的綠泥石和伊利石,高嶺石占絕對(duì)含量最大；分形特征顯示F10斷層粘滑與蠕滑性質(zhì)兼具。對(duì)原巖地應(yīng)力進(jìn)行測(cè)試,顯示新集礦區(qū)是以NEE或近EW向水平主應(yīng)力為最大主應(yīng)力的構(gòu)造應(yīng)力場(chǎng),最大和中間主應(yīng)力隨深度變化都分為三個(gè)階段,說明礦區(qū)經(jīng)歷了三期構(gòu)造運(yùn)動(dòng)的改造。
[Abstract]:Xinji mining area is located on the south flank of Huainan complex slope of North China plate. The complex. F10 normal fault in the area is the fault in coal measure with the largest drop in mining area and the most cut coal seam. The roadway arrangement and mining sequence are arranged. Coal and gas outburst prevention and other mine geological work has an important impact. By means of data analysis, engineering drilling, laboratory test and in-situ test, the characteristics of fault evolution, engineering mechanics of rock mass in fault zone, characteristics of fault gouge and regional stress field are analyzed and studied. It is of great significance to reveal the nature and evolution law of F10 fault, which can be used for reference in the layout of mining area production and the prevention of geological hazards. Based on the regional tectonic setting and tectonic development characteristics, this paper discusses the general characteristics of normal fault evolution in the mining area under the large tectonic background. The F10 fault has undergone three different directions: Indosinian movement, Yanshanian movement and Himalayan movement. In the reconstruction of tectonic movement with different properties, the nature of faults shows certain complexity and particularity. Combined with the exploration data, the morphological and developmental characteristics of the F10 fault are revealed. The normal fault near the fault is relatively developed, but most of the faults are of reverse fault nature, because the mining area is located in the former land belt of the north and south direction to counter the nappe. The reverse fault and wide fold in the north tend to be developed, and the strike statistics of small faults in the area are mainly divided into two groups: NEE and SEE conjugation. The physical and mechanical properties of rock mass in fault zone are tested, and the gradation and fractal characteristics of fault gouge, the composition and content of clay minerals in fault gouge are analyzed. The overall gradation of fault gouge is good and the particle size distribution is uneven. The clay minerals in the clay are mainly kaolinite, immonitic layer and a small amount of chlorite and Illite, and kaolinite is the largest in absolute content, and the fractal characteristics show that the F10 fault is both viscous and creeping. The geostress of the original rock shows that the NEE or near EW horizontal principal stress is the maximum principal stress field in Xinji mining area, and the maximum and intermediate principal stresses are divided into three stages with the depth variation. It shows that the mining area has undergone three stages of tectonic transformation.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.11

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