淮南煤田北部矿区构造控水机理研究

发布时间：2018-03-03 11:33

本文选题：淮南煤田　切入点：构造演化　出处：《安徽理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：淮南煤田地处华北煤田南缘,经历多期构造地质作用,使区内构造地质条件复杂。煤田主体为复式向斜构造,区内褶皱、断裂构造极为发育。构造作用不仅控制了含水系统的结构形态,而且控制着地下水动力条件,特别是在喜山期形成的大量NE-NNE走向张裂性正断层,在研究区形成阶梯式断裂构造,对含水层改造最为明显。因此,在本区开展构造控水研究很有必要也很有意义。本文以淮南煤田北部的口孜东矿、刘庄矿、谢桥矿和张集矿为研究对象,研究范围涵盖阜东矿区、潘谢矿区。运用构造演化法和水文地质结构系统分析法,主要从淮南煤田区域构造特征及构造演化过程、构造控水、水文地质块段划分三方面进行研究,取得如下一些认识： 1.构造特征方面：淮南煤田现今构造格局是印支运动、燕山运动、喜山运动等多期构造运动叠加的结果,以NE-NNE向构造数量最多,近EW向和NW-NWW向次之,研究区基岩面形态特征为东南高、西北低,是推覆构造产生的褶皱经差异性风化的结果； 2.构造如何控水：构造控水可概括为“水文地质结构系统控制地下水系”,大型构造运动如加里东运动、华力西运动控制着含水层的沉积和形成,后期又经历的多期挤压和拉张作用对含水层加以改造,最终将各含水层改造成现今这种状态,断层对含水层切割,增强了岩层的储水能力和富水性,大型阻水构造如阜凤逆冲断层,往往作为水文地质单元边界,而深大断裂沟通了各含水层,控制着地下水的补、径、排特征； 3.水文地质单元块段划分：根据不同地段水文地质条件及水动力条件的差异,将研究区划分为“北区”块段、“南区”块段、“中区-西”块段和“中区-东”块段,并分析构造对各块段内部的水动力条件的控制。最后,结合矿山生产实际,总结了断层对研究区矿井突水的控制作用,认为突水部位往往在深大断裂或次生断层附近,深大断裂及次生断层部位为矿井水害隐患点,建议注浆改造。
[Abstract]:Huainan coalfield is located in the southern margin of North China coalfield, experiencing multiple tectonic geological processes, which makes the tectonic geological conditions in the area complicated. The main body of the coalfield is a compound syncline structure, and the fold in the area, The tectonic process not only controls the structural shape of the water-bearing system, but also controls the dynamic conditions of groundwater, especially in the Himalayan period, where a large number of NE-NNE strike fracture normal faults are formed, and a stepped fault structure is formed in the study area. Therefore, it is necessary and meaningful to study tectonic water control in this area. In this paper, the Kou Zidong, Liuzhuang, Xieqiao and Zhangji mines in the northern part of Huainan coalfield are taken as the research objects. The research scope covers the Fudong and Panxie ore areas. The structural evolution method and the hydrogeological structure system analysis method are used in this paper. Based on the study of the regional structural characteristics and tectonic evolution process of Huainan coalfield, structural water control and the division of hydrogeological blocks, some understandings are obtained as follows:. 1. Structural characteristics: the present tectonic pattern in Huainan coalfield is the result of the superposition of Indosinian, Yanshanian and Himalayan movements, with the NE-NNE direction being the largest, the near EW direction and the NW-NWW direction being the second. The characteristics of the bedrock surface in the study area are high in the southeast and low in the northwest, which is the result of the differential weathering of the fold produced by the nappe structure. 2. How the structure controls water: tectonic water control can be summed up as "hydrogeological structure system controls groundwater system". Large tectonic movements such as Caledonian movement and Varisci movement control the deposition and formation of aquifers. At the end of the period, the aquifer was transformed by multiple periods of compression and tension, and eventually the aquifer was transformed into the present state, and the fault cut the aquifer, which enhanced the water storage capacity and water enrichment of the rock bed. Large water-blocking structures, such as Fufeng thrust fault, are often used as the boundary of hydrogeological unit, while deep and large faults communicate with each aquifer and control the characteristics of groundwater replenishment, diameter and drainage. 3. Block division of hydrogeological units: according to the differences of hydrogeological and hydrodynamic conditions in different sections, the study area is divided into "North" block, "southern" block, "central area-west" block and "central area-east" block. The control of the hydrodynamic conditions in each block is analyzed. Finally, combined with the practice of mine production, this paper summarizes the control effect of fault on water inrush in mine in the study area. It is considered that the water inrush part is usually near deep fault or secondary fault, and deep fault and secondary fault are hidden danger points of mine water hazard. It is suggested that grouting be reformed.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.461

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