【摘要】：礦井涌水量預測對于煤礦防排水系統(tǒng)的設計以及突水事故的預防具有重要意義,是煤礦安全生產(chǎn)的保障。煤礦的安全開采是以各個生產(chǎn)指標作為評定標準的,其直接影響煤礦開采的總體布局,涌水量作為其中重要的組成部參數(shù),越來越受到重視�，F(xiàn)有的涌水量預測方法多種多樣,近幾年來,其中的數(shù)值模擬法得到了工作者的廣泛認可。伴隨著計算機水平的迅猛發(fā)展,各種軟件層出不窮,德國的Feflow軟件在國內(nèi)外憑借其優(yōu)秀的數(shù)據(jù)處理、便捷的參數(shù)調(diào)整和豐富的圖像顯示能力得到了廣大水文地質(zhì)工作者的青睞。本文基于Feflow軟件模擬預測礦井涌水,通過全面的軟件介紹,深入應用于煤礦地下水的預測中,取得了以下研究成果。包括有:(1)總結(jié)數(shù)值模擬以及礦井涌水量預測國內(nèi)外的研究現(xiàn)狀,對比現(xiàn)存不同地下水模擬軟件的優(yōu)缺點,全面分析Feflow軟件的輸入、輸出、求解的功能和特點以及在礦井涌水預測中的適用性。(2)通過一個已知解析解的1400m*1400m矩形和45°扇形理想含水層抽水模型,將Feflow軟件模擬結(jié)果與已知結(jié)果進行對比,驗證Feflow軟件模擬的準確性。(3)研究礦區(qū)實際水文地質(zhì)情況,詳細分析應用Feflow軟件開展數(shù)值模擬計算時所需的參數(shù),結(jié)合Autocad、Arcgis、Sufer、office等軟件進行大量數(shù)據(jù)處理與概化。(4)應用Feflow軟件對范各莊礦全礦及其第四層含水層單層進行數(shù)值模擬,將模擬結(jié)果進行多次運行、識別、調(diào)參,并擬合水文觀測孔的水位數(shù)據(jù),最后應用二維或三維圖、趨勢表進行顯示。(5)將數(shù)值模擬結(jié)果與實際觀測孔數(shù)據(jù)擬合,探討模擬誤差產(chǎn)生的原因。通過擬合全礦地下水流場,分析了礦井涌水量的組成。通過第四層含水層的模擬,觀測孔水位誤差僅僅2.8%和5.2%,效果良好。預測2017年的地下流場符合實際情況,水位下降趨勢與2016年相同;模擬預測5年后(2020年)12-14煤含水層地下水流場變化趨勢,根據(jù)模擬結(jié)果預測2020年12煤-14煤含水層(第四含水層)涌水量為14.14 m3/min。(6)分析誤差來源于資料準確性與全面性,網(wǎng)格劃分賦值產(chǎn)生的不確定性等。充分分析軟件特點以及模擬數(shù)據(jù),總結(jié)出Feflow在礦井涌水量預測中具有調(diào)參簡捷,后處理能力強、顯示效果好等特點,具有其他軟件所不具備的成圖優(yōu)勢。軟件對于模擬地下水流場及運動趨勢效果良好,但是對于涌水量等定量預測依然存在不小難度,包括需要進行大量的高精度原始數(shù)據(jù)的收集等方面。
[Abstract]:The prediction of mine water inflow is of great significance to the design of water prevention and drainage system in coal mine and the prevention of water inrush accident. It is the guarantee of safe production in coal mine. Coal mine safety mining is based on each production index as the evaluation standard, which directly affects the overall layout of coal mining, inrush water as one of the important component parameters, more and more attention has been paid to it. In recent years, the numerical simulation method has been widely recognized by workers. With the rapid development of computer level, various kinds of software emerge one after another. With its excellent data processing, convenient parameter adjustment and rich image display ability, German Feflow software has been favored by the majority of hydrogeologists at home and abroad. This paper is based on the Feflow software to simulate and predict the mine gushing water. Through the introduction of the comprehensive software, it has been deeply applied to the prediction of underground water in coal mines, and the following research results have been obtained. It includes: (1) summarize the research status of numerical simulation and mine water inflow prediction at home and abroad, compare the advantages and disadvantages of the existing different groundwater simulation software, and analyze the input and output of Feflow software in an all-round way. The function and characteristics of the solution and its applicability in the prediction of mine gushing are discussed. (2) through a 1400m*1400m rectangular and 45 擄fan-shaped ideal aquifer pumping model with known analytical solution, the simulation results of Feflow software are compared with the known results. Verify the accuracy of Feflow software simulation. (3) study the actual hydrogeological situation of mining area, analyze in detail the parameters needed to carry out numerical simulation with Feflow software, and combine with Autocad,Arcgis,Sufer,. Office and other software are used to process and generalize a lot of data. (4) Feflow software is used to simulate the whole mine and the single layer of the fourth aquifer in Fangezhuang Mine, and the simulation results are run, identified and adjusted for many times. Finally, two-dimensional or three-dimensional diagrams and trend tables should be used to display the water level data of hydrologic observation holes. (5) the numerical simulation results are fitted with the actual observation hole data, and the causes of simulation errors are discussed. By fitting the groundwater flow field of the whole mine, the composition of mine water inflow is analyzed. Through the simulation of the fourth aquifer, the error of the observation hole water level is only 2.8% and 5.2%, and the effect is good. The prediction of the underground flow field in 2017 accords with the actual situation, and the downward trend of water level is the same as in 2016; The variation trend of groundwater flow field in 12-14 coal aquifer after 5 years (2020) is simulated and predicted. According to the simulation results, the water inflow of the 12-14 coal aquifer (the fourth aquifer) in 2020 is predicted to be 14.14 m3 / min. (6) the analysis error comes from the accuracy and comprehensiveness of the data, the uncertainty of the grid assignment and so on. By fully analyzing the characteristics of the software and the simulated data, it is concluded that Feflow has the advantages of simple adjustment of parameters, strong post-processing ability and good display effect in the prediction of mine water inflow, and has the advantages of drawing which other software does not have. The software has a good effect on simulating groundwater flow field and movement trend, but there are still some difficulties in quantitative prediction such as water inrush, including the need to collect a large number of high-precision raw data.
【學位授予單位】：華北科技學院
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD742

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