【摘要】：拉拉銅礦周圍的紅泥坡—綠水靶區(qū)存在一處隱伏礦。礦體首先是被點上的鉆探工作發(fā)現(xiàn)的,后來做過磁法及電磁法勘探,取得了一些小比例尺的面上資料成果。但是在大比例尺精度上了解地層構(gòu)造以及礦體在橫向空間展布情況的時候,常規(guī)地球物理的金屬礦勘探方法遇到了方法本身的局限。為此,本文打破常規(guī),首次采用地震勘探方法在該地區(qū)進(jìn)行高精度的地層構(gòu)造以及礦體賦存狀況的成像試驗。本項研究工作牽涉到的內(nèi)容比較多,包括地震勘探、多尺度地球物理資料解釋、三維地震正演方法技術(shù)工具研發(fā)以及正演計算分析等方面。這是一個從理論到實踐全面覆蓋的綜合性較強的研究項目。此外,由于地震勘探實驗是針對金屬礦勘探進(jìn)行的,工作內(nèi)容涉及到金屬礦反射勘探與折射勘探的震源試驗,需要解決數(shù)據(jù)采集、處理與解釋方面的各種特殊問題。因此這也是一項探索性較強的試驗工作。本項試驗取得了滿意的研究結(jié)果,包括:(1)利用10條地震剖面,以規(guī)則網(wǎng)格的方式對探區(qū)地下地層以及礦體的空間展布進(jìn)行了高密度控制;(2)綜合折射波淺部信息和反射波資料的深部信息獲得了工區(qū)的地震波速度參數(shù)模型;(3)在整個工區(qū)的反射波資料50 ms到100 ms深度范圍內(nèi)存在的強反射同相軸,揭示了地表松散風(fēng)化層底界面的埋深;(4)反射地震剖面下部普遍存在能量較強、地震波速較高的地震散射體,不僅與激發(fā)極化法資料的異常體深度范圍一致,而且與鉆探在160 m深度上發(fā)現(xiàn)的高品位銅礦資料相吻合,揭示了含礦構(gòu)造在工區(qū)范圍內(nèi)的空間展布情況;(5)此外,本文綜合建立了該區(qū)域的三維地震結(jié)構(gòu)模型,用有限差分法對進(jìn)行了三維波動方程正演模擬,通過模擬數(shù)據(jù)與勘探數(shù)據(jù)的吻合度,驗證了三維地震結(jié)構(gòu)模型的可靠性。本項試驗工作全面完成了預(yù)定的研究目標(biāo)。
[Abstract]:There is a hidden ore in the red mud slope-green water target area around Lala Copper Mine. The orebody was first discovered by drilling work on the point, and then it was explored by magnetic and electromagnetic methods, and some data on the surface of small scale were obtained. However, when the stratigraphic structure and the distribution of ore bodies in the transverse space are understood in large scale accuracy, the conventional geophysical methods of metal ore exploration meet the limitations of the methods themselves. Therefore, in this paper, the seismic exploration method is used for the first time to carry out the high-precision imaging tests of stratigraphic structures and the occurrence of orebodies in this area. This research involves many aspects, such as seismic exploration, multi-scale geophysical data interpretation, 3D seismic forward modeling techniques and tools, forward calculation analysis, and so on. This is a comprehensive and comprehensive research project from theory to practice. In addition, because the seismic exploration experiment is aimed at the exploration of metal ore, the work involves the seismic source test of reflection exploration and refraction exploration of metal ore, so it is necessary to solve various special problems in data acquisition, processing and interpretation. Therefore, this is also a strong exploratory experimental work. Satisfactory results have been obtained in this experiment, including: (1) using 10 seismic profiles, The spatial distribution of underground strata and orebodies in the exploration area is controlled by a regular grid method, (2) the seismic velocity parameter model of the working area is obtained by synthesizing the shallow and deep information of refraction wave data, and (3) the velocity parameter model of seismic wave in the working area is obtained by integrating the shallow information of refraction wave and the deep information of reflected wave data. The strong reflection cophase axis exists in the depth range of 50 ms to 100 ms from the reflected wave data of the whole working area. It reveals the buried depth of the bottom interface of the loose weathered layer on the surface. (4) there is a strong energy and high seismic wave velocity in the lower part of the reflection seismic profile, which is not only consistent with the depth range of the anomalous body of the induced polarization method. In addition, the spatial distribution of ore-bearing structures in the working area is revealed. (5) in addition, the 3D seismic structure model of this area is established synthetically in this paper. The forward modeling of 3-D wave equation is carried out by finite difference method. The reliability of 3D seismic structural model is verified by the coincidence between simulated data and exploration data. The experimental work has fully completed the intended research objectives.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P631.4

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