本文關(guān)鍵詞： 灰?guī)r水防治 突水系數(shù) 富水性 灰色理論 數(shù)值模擬 模糊評(píng)判法　出處：《安徽理工大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：淮北煤田作為典型的華北型煤田,水文地質(zhì)條件復(fù)雜,隨著開(kāi)采深度、速度以及規(guī)模的增加,煤礦安全開(kāi)采普遍受到太灰水和奧灰水的嚴(yán)重威脅,也曾發(fā)生多次底板突水事故。故本文針對(duì)孫疃煤礦104采區(qū)底板上段灰?guī)r含水層富水性特征及突水危險(xiǎn)性預(yù)測(cè)與評(píng)價(jià)進(jìn)行了多方面研究。 本文首先從礦井區(qū)域水文地質(zhì)條件、太灰?guī)r層厚度和巖性組合特征、水化-水力學(xué)條件以及巖溶發(fā)育情況分析了太原組1～4灰?guī)r水文地質(zhì)條件以及富水性特征。結(jié)果表明,對(duì)10煤層開(kāi)采有影響的太原組1～4灰含水層處于相對(duì)封閉的水文地質(zhì)單元,水文地質(zhì)條件中等～復(fù)雜,巖溶發(fā)育不均,水力聯(lián)系差,富水性弱～中等且差異性較大。同時(shí)采用“大井”法和比擬法對(duì)采區(qū)的涌水量進(jìn)行了預(yù)測(cè),疏放水前,最大涌水量260m3/h,疏放水后,最大涌水量221m3/h。其次利用分形理論分析了煤層底板隔水巖體的完整性,同時(shí)建立有限元數(shù)值模型預(yù)測(cè)采動(dòng)作用下底板應(yīng)力分布特征及破壞深度值,預(yù)測(cè)結(jié)果與102采區(qū)實(shí)測(cè)底板破壞深度值相近,最終確定煤層底板的最大破壞深度為12.95m。結(jié)合研究區(qū)內(nèi)底板巖體總體抗壓強(qiáng)度、隔水層厚度和巖層組合情況綜合分析了底板阻隔水性能。斷層富水性探查結(jié)果表明,F5斷層帶大多充填物以泥巖為主,擠壓明顯,富水性弱、導(dǎo)水性差,北軌道大巷掘進(jìn)時(shí)無(wú)出水現(xiàn)象。最后運(yùn)用突水系數(shù)法和灰色模糊綜合評(píng)判法對(duì)底板突水危險(xiǎn)性進(jìn)行綜合預(yù)測(cè)與評(píng)價(jià),并對(duì)預(yù)測(cè)結(jié)果進(jìn)行了參數(shù)靈敏度分析。研究區(qū)底板以突水相對(duì)安全區(qū)和威脅區(qū)為主,安全區(qū)分布在斷層不發(fā)育,底板相對(duì)較穩(wěn)定區(qū)域；而鉆孔085、14-5、15-22以及斷層F5附近為突水危險(xiǎn)區(qū)。威脅區(qū)和危險(xiǎn)區(qū)是煤礦生產(chǎn)過(guò)程中應(yīng)重點(diǎn)探查與預(yù)防區(qū)域。通過(guò)區(qū)域劃分評(píng)價(jià)底板突水危險(xiǎn)性,為煤層開(kāi)采過(guò)程中采取具體的防治水方案和措施提供了依據(jù)。
[Abstract]:As a typical North China coal field, Huaibei coalfield has complex hydrogeological conditions. With the increase of mining depth, speed and scale, the safe mining of coal mine is generally seriously threatened by too ash water and Ordovician ash water. There have been many water inrush accidents on the bottom plate, so this paper studies the water-rich characteristics of limestone aquifer and the prediction and evaluation of the water inrush risk in the upper section of the bottom plate in Suntuan Coal Mine 104. In this paper, the characteristics of hydrogeological conditions, thickness and lithology combination of Tai-limestone layer in the mine area are first discussed in this paper. The hydrogeological conditions and water-rich characteristics of No. 1 limestone in Taiyuan formation are analyzed in terms of hydration-hydraulics and karst development. The No. 4 ash aquifer of Taiyuan formation, which has influence on the mining of 10 coal seam, is located in a relatively closed hydrogeological unit, with moderate to complex hydrogeological conditions, uneven karst development and poor hydraulic connection. At the same time, the "big well" method and the analogy method are used to predict the water inflow in the mining area. Before the drainage, the maximum water inflow is 260 m3 / h, after the drainage. The maximum discharge capacity is 221m3 / h. Secondly, the integrality of water-barrier rock mass of coal seam floor is analyzed by using fractal theory, and the finite element numerical model is established to predict the stress distribution characteristics and failure depth value of bottom slab for mining action. The predicted results are close to the measured failure depth of floor in 102 mining area, and the maximum failure depth of coal seam floor is determined to be 12.95 m. The overall compressive strength of floor rock mass in combination with the study area is determined. The water barrier performance of the bottom plate is analyzed synthetically by the thickness of the water-barrier layer and the rock combination. The results of water-rich exploration show that most of the filling materials in the fault zone are mudstone, extrusion is obvious, water enrichment is weak, and the water conductivity is poor. Finally, the water inrush risk of bottom slab is forecasted and evaluated by using water inrush coefficient method and grey fuzzy comprehensive evaluation method. The sensitivity of the prediction results is analyzed. The main parts of the study area are the water inrush relative safety zone and the threat area. The safety zone is located in the area where the fault is not developed and the bottom plate is relatively stable. Borehole 0855-5. 15-22 and near fault F5 are dangerous areas of water inrush. Threat areas and dangerous areas are the areas that should be explored and prevented in the process of coal mine production, and the risk of water inrush on the floor is evaluated through the division of regions. It provides the basis for the concrete water prevention plan and measure in the coal seam mining process.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：P641.4;TD74

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