淮南朱集矿F22断层构造区应力模拟分析

发布时间：2018-04-20 18:52

本文选题：断层 + 地应力　；参考：《安徽理工大学》2015年硕士论文

【摘要】：淮南朱集矿所处区域地质构造复杂,褶皱、断层等分布密集,加之煤层埋藏深,使煤矿开采难度加大。该矿区的F22断层就是区内最重要的逆断层。为了能够安全、高效地开采该断层上盘的煤炭资源,必须对该断层构造区域的地应力分布状况做充分了解,本文的研究目的恰在于此。论文主要收集了该矿区工程地质条件、水文地质条件和勘探时期的地质资料,并在分析勘探区各钻孔测井资料的基础上,对该区地层的地球物理性质有了基本判断,即以断层F22为界,该断层上盘主要表现为低电阻率、高自然伽马测井特征,断层下盘表现为高电阻率、低自然伽马的测井特征：且断层F22周围自然电位表现为明显的负异常。论文对水压致裂法、应力解除法、声发射法和测井方法等地应力实测技术进行阐述,分析各种方法的测试原理、测试装备、测试系统和测试方法,并对各种方法的应用范围、求解地应力的准确性以及各测试方法的优缺点等进行了总结。论文运用Flac3D有限差分软件对F22断层构造区地应力分布规律和断层构造区巷道开挖应力变化规律进行数值模拟,模拟结果表明：由于断层带的存在,扰乱了地应力的原始分布,即在断层带附近出现了应力异常,且断层上盘应力集中现象比下盘明显；同时,巷道开挖时,随着开挖距离愈接近断层,其应力变化愈明显,该结论为巷道的开挖设计、支护等提供了理论参考。
[Abstract]:The complex regional geological structure, dense folds and faults, and the depth of coal seam in Zhuji mine in Huainan make mining more difficult. The F 22 fault is the most important thrust fault in the area. In order to safely and efficiently exploit the coal resources in the upper face of the fault, it is necessary to make a full understanding of the distribution of geostress in the tectonic area of the fault, which is the purpose of this paper. The paper mainly collects the geological data of engineering geology, hydrogeology and exploration period in this mining area, and on the basis of analyzing the borehole logging data in the exploration area, the geophysical properties of the strata in this area are basically judged. That is to say, the upper face of fault F22 is characterized by low resistivity and high natural gamma logging, while the lower face of fault is characterized by high resistivity and low natural gamma, and the natural potential around fault F22 shows obvious negative anomaly. In this paper, the in-situ stress measurement techniques, such as hydraulic fracturing method, stress relief method, acoustic emission method and logging method, are described. The testing principle, testing equipment, testing system and testing methods are analyzed, and the scope of application of various methods is also discussed. The accuracy of geostress solution and the advantages and disadvantages of each test method are summarized. In this paper, Flac3D finite difference software is used to simulate the distribution of in-situ stress in F22 fault area and the variation law of excavation stress in roadway. The simulation results show that the original distribution of in-situ stress is disturbed because of the existence of fault zone. That is, the stress anomaly appears near the fault zone, and the phenomenon of stress concentration in the upper face of the fault is more obvious than that in the lower side, at the same time, when the tunnel excavation is closer to the fault, the stress change becomes more obvious with the distance of excavation. This conclusion is the excavation design of the roadway. The support provides a theoretical reference.
【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】：TD311

【参考文献】