本文選題：斷層 + 地應(yīng)力��； 參考：《安徽理工大學(xué)》2015年碩士論文

【摘要】：淮南朱集礦所處區(qū)域地質(zhì)構(gòu)造復(fù)雜,褶皺、斷層等分布密集,加之煤層埋藏深,使煤礦開采難度加大。該礦區(qū)的F22斷層就是區(qū)內(nèi)最重要的逆斷層。為了能夠安全、高效地開采該斷層上盤的煤炭資源,必須對該斷層構(gòu)造區(qū)域的地應(yīng)力分布狀況做充分了解,本文的研究目的恰在于此。 論文主要收集了該礦區(qū)工程地質(zhì)條件、水文地質(zhì)條件和勘探時期的地質(zhì)資料,并在分析勘探區(qū)各鉆孔測井資料的基礎(chǔ)上,對該區(qū)地層的地球物理性質(zhì)有了基本判斷,即以斷層F22為界,該斷層上盤主要表現(xiàn)為低電阻率、高自然伽馬測井特征,斷層下盤表現(xiàn)為高電阻率、低自然伽馬的測井特征：且斷層F22周圍自然電位表現(xiàn)為明顯的負(fù)異常。 論文對水壓致裂法、應(yīng)力解除法、聲發(fā)射法和測井方法等地應(yīng)力實測技術(shù)進(jìn)行闡述,分析各種方法的測試原理、測試裝備、測試系統(tǒng)和測試方法,并對各種方法的應(yīng)用范圍、求解地應(yīng)力的準(zhǔn)確性以及各測試方法的優(yōu)缺點等進(jìn)行了總結(jié)。 論文運用Flac3D有限差分軟件對F22斷層構(gòu)造區(qū)地應(yīng)力分布規(guī)律和斷層構(gòu)造區(qū)巷道開挖應(yīng)力變化規(guī)律進(jìn)行數(shù)值模擬,模擬結(jié)果表明：由于斷層帶的存在,擾亂了地應(yīng)力的原始分布,即在斷層帶附近出現(xiàn)了應(yīng)力異常,且斷層上盤應(yīng)力集中現(xiàn)象比下盤明顯；同時,巷道開挖時,隨著開挖距離愈接近斷層,其應(yīng)力變化愈明顯,該結(jié)論為巷道的開挖設(shè)計、支護(hù)等提供了理論參考。
[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.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD311

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