本文選題：潘集礦區(qū)深部 + 煤層頂板　； 參考：《安徽理工大學(xué)》2015年碩士論文

【摘要】：頂板事故是我國礦井生產(chǎn)過程中最主要的安全生產(chǎn)事故,嚴(yán)重威脅了礦井的高效安全生產(chǎn),因而對煤層頂板穩(wěn)定性研究在生產(chǎn)實踐中也有迫切的需要。本文以潘集礦區(qū)深部13-1煤層為研究對象,以60個鉆孔資料為基礎(chǔ),從巖石物理力學(xué)性質(zhì)、巖性組合及分布特征和巖石質(zhì)量等方面闡述其頂板工程地質(zhì)特征,并從斷裂分維值、平面變形系數(shù),巖石的抗壓強(qiáng)度和巖性組合值等四個方面以模糊綜合評價的方法對其頂板穩(wěn)定程度定量評價,并在此基礎(chǔ)上運用FLAC3D數(shù)值模擬的方法對老頂和直接頂兩種頂板類型的采動效應(yīng)進(jìn)行分析,并與淺部開采情況進(jìn)行對比。取得以下認(rèn)識： 潘集礦區(qū)深部13-1煤層頂板類型以直接頂型、老頂型為主；巖性分區(qū)以泥巖區(qū)和粉砂巖-泥巖區(qū)為主；總體上砂巖的RQD值和漏失量最大,粉砂巖次之,泥巖最小,但在斷裂發(fā)育區(qū)RQD值小,漏失量大；巖石的抗壓強(qiáng)度與測井特征有較好的相關(guān)性,可以用于定性的評價；巖體結(jié)構(gòu)類型以塊裂結(jié)構(gòu)和碎裂結(jié)構(gòu)為主,塊狀結(jié)構(gòu)次之,松散結(jié)構(gòu)分布范圍最小；褶皺發(fā)育類型以較發(fā)育為主,輕微發(fā)育次之,而極發(fā)育分布范圍最小；抗壓強(qiáng)度分區(qū)主要以較低強(qiáng)度區(qū)為主,較高強(qiáng)度值次之,高強(qiáng)度區(qū)分布范圍最小。 運用灰色模糊綜合評價把潘集礦區(qū)深部13-1煤層頂板分為四個穩(wěn)定程度分區(qū),以不穩(wěn)定區(qū)和中等穩(wěn)定區(qū)為主,極不穩(wěn)定區(qū)和穩(wěn)定區(qū)分布較少。而利用FALC3D數(shù)值模擬技術(shù)模擬不同頂板類型的采動效應(yīng)特征,其結(jié)果表明：在深部開采條件下,老頂和直接頂?shù)淖畲笾鲬?yīng)力值相差較小,且應(yīng)力集中系數(shù)相比淺部變��；但頂板的位移相對于淺部要增大,且老頂?shù)奈灰屏恳∮谥苯禹敚煌瑫r表明,兩帶的發(fā)育高度不僅與巖性和采高有關(guān),在一定程度上跟開采深度也有關(guān)聯(lián)。 通過對潘集礦區(qū)深部13-1煤層頂板工程地質(zhì)特征及其穩(wěn)定性的研究,能為后期建井和煤層開采提供一定的科學(xué)依據(jù)。
[Abstract]:Roof accident is the most important safety accident in mine production in our country, which seriously threatens the high efficiency and safety production of coal mine. Therefore, it is urgent to study the stability of coal seam roof in production practice. Taking deep 13-1 coal seam in Panji mining area as the object of study, based on the data of 60 boreholes, this paper expounds the roof engineering geological characteristics from the aspects of rock physical and mechanical properties, lithologic assemblages and distribution characteristics and rock quality, and the fractal dimension of faults. The stability of roof is quantitatively evaluated by fuzzy comprehensive evaluation method in four aspects: plane deformation coefficient, compressive strength of rock and lithology combination value. On this basis, the mining effects of two types of roof are analyzed by using FLAC3D numerical simulation method, and compared with shallow mining. Acquire the following awareness: The roof type of deep 13-1 coal seam in Panji mining area is mainly of direct roof type and main roof type; lithologic zoning is dominated by mudstone area and siltstone-mudstone area; on the whole, the RQD value and leakage amount of sandstone is the largest, siltstone is the second, and mudstone is the smallest. However, in the fault development area, the RQD value is small, the leakage is large, the compressive strength of rock has a good correlation with the logging characteristics, and can be used for qualitative evaluation, the rock mass structure type is mainly block fracture structure and fragmentation structure, and block structure is the second. The distribution range of loose structure is the smallest, the type of fold development is mainly relatively developed, the second is slight development, and the distribution range of polar development is the smallest, the compressive strength is mainly in the low strength area, and the higher strength is the second. The distribution range of high intensity region is the smallest. The roof of deep 13-1 coal seam in Panji mining area is divided into four stable degree zones by using grey fuzzy comprehensive evaluation. The unstable and medium stable areas are the main ones, and the distribution of extremely unstable areas and stable areas is less. The FALC3D numerical simulation technique is used to simulate the characteristics of mining effect of different roof types. The results show that under the condition of deep mining, the difference of the maximum principal stress between the main roof and the direct roof is relatively small, and the stress concentration factor is smaller than that of the shallow. However, the displacement of the roof is larger than that of the shallow, and the displacement of the main roof is smaller than that of the direct roof, which indicates that the development height of the two zones is not only related to lithology and mining height, but also related to the mining depth to some extent. The study on the engineering geological characteristics and stability of the roof of deep 13-1 coal seam in Panji mining area can provide a certain scientific basis for the later construction of well and mining of coal seam.
【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】：TD163.1;TD327.2

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