本文選題：地下水 + 數(shù)值模擬��； 參考：《石家莊經(jīng)濟(jì)學(xué)院》2015年碩士論文

【摘要】：水害是煤礦的主要災(zāi)害之一,不但威脅生命還影響正常工業(yè)生產(chǎn)。其中底板突水是煤礦水害主要組成部分。采用數(shù)值法對客觀事物進(jìn)行研究,普遍存在各個學(xué)科和領(lǐng)域中。采用數(shù)值法來研究地下水運(yùn)動規(guī)律一直是水文地質(zhì)上的熱點(diǎn)。研究對象將選擇水害嚴(yán)重的峰峰五礦的東翼區(qū),對于探討該地區(qū)疏水降壓、安全生產(chǎn)有一定的意義,并可為類似地區(qū)提供參考。本文通過對峰峰五礦東翼區(qū)的實(shí)測數(shù)據(jù)展開研究,依托于對東翼區(qū)大青灰?guī)r放水試驗(yàn)的實(shí)測數(shù)據(jù),對研究含水層-大青灰?guī)r地質(zhì)及水文地質(zhì)情況進(jìn)行分析、歸納、概化,并建立與之相類似的數(shù)學(xué)模型。通過引用世界上先進(jìn)的Visual Modflow、GMS地下水?dāng)?shù)值模擬軟件在數(shù)學(xué)模型的基礎(chǔ)上進(jìn)行數(shù)值模擬。根據(jù)承壓含水層水位和水壓之間的關(guān)系運(yùn)用突水系數(shù)法對上伏5#、6#煤進(jìn)行突水系數(shù)評估。在此基礎(chǔ)上運(yùn)用已經(jīng)建立的數(shù)值模型進(jìn)行保證上伏5#、6#煤安全生產(chǎn)的條件下,大青灰?guī)r含水層需要疏放的水量的預(yù)測。研究取得幾點(diǎn)認(rèn)識:1)東翼區(qū)大青灰?guī)r含水層水平滲透系數(shù)5~16 m/d,垂向?yàn)樗降氖种?貯水系數(shù)1.0×10~(-5)~4.0×10~(-5),越流系數(shù)4×10~(-4)~4×10~(-6)。2)通過放水,全區(qū)水位平均下降20m,水位在12~24小時達(dá)到平衡,關(guān)閉放水井水位迅速恢復(fù),說明大青灰?guī)r含水層水量補(bǔ)給豐富但也易于疏水降壓。3)東翼區(qū)大青灰?guī)r對5#、6#煤突水系數(shù)分別為0.051~0.094、0.102~0.499,如果不采取防治措施東翼區(qū)下組5#、6#煤開采受到水害風(fēng)險較大。4)通過對于大青灰?guī)r含水層采取適當(dāng)?shù)牧糠潘?能夠降低該含水層的水位和對頂板的水壓力。綜上所述,以數(shù)值法為研究手段,以井田實(shí)測放水?dāng)?shù)據(jù)為基礎(chǔ),依托于Visual Modflow、GMS地下水?dāng)?shù)值模擬軟件對研究區(qū)含水層進(jìn)行放水試驗(yàn)數(shù)值模擬,以及放水量預(yù)測分析后,認(rèn)為通過采用疏水降壓能夠有效的降低該區(qū)域5#、6#煤開采時底板突水的風(fēng)險。
[Abstract]:Water disaster is one of the main disasters in coal mine, which not only threatens life but also affects normal industrial production. The water inrush from the floor is the main component of the coal mine water hazard. The numerical method is used to study the objective things, and there are various disciplines and fields. It has been a hot point in hydrogeology to study the movement law of groundwater by numerical method. The study object will select the east wing area of Fengfeng No.5 Mine which is seriously damaged by water. It is of certain significance to discuss the hydrophobic pressure lowering and safe production in this area and can provide reference for similar areas. Based on the measured data of Daqing limestone discharge test in the east wing of Fengfeng No. 5 Mine, this paper analyzes and generalizes the geological and hydrogeological conditions of the aquifer-Daqing limestone. A similar mathematical model is established. Based on the mathematical model, the advanced numerical simulation software of Visual Modflow GMS is used to simulate groundwater in the world. According to the relation between water level and water pressure of confined aquifer, the water inrush coefficient was evaluated by water inrush coefficient method. On the basis of this, the numerical model has been established to predict the amount of water that needs to be sparse in Daqing limestone aquifer under the condition of ensuring the safety of coal production of No. 5 #y6 # coal. Several understandings are obtained in this study: the horizontal permeability coefficient of the Daqing limestone aquifer in the eastern wing area is 516 m / d, the vertical level is 1/10, the water storage coefficient is 1.0 脳 10 ~ (10) ~ (-5) and the overflow coefficient is 4 脳 10 ~ (10) -4 ~ (4) 脳 10 ~ (10) ~ (6) 路2) by discharging water, the water level in the whole area decreases by 20 m on average, and the water level reaches equilibrium in 1224 hours. Close the well and restore the water level quickly. It shows that Daqing limestone aquifer is rich in water recharge but easy to hydrophobic and depressurized. 3) the water inrush coefficient of Daqing limestone to 5 #jiao 6# coal in the eastern wing area is 0.051 ~ 0.0942 ~ (0.102) ~ (0.499), respectively. If no prevention measures are taken, the water hazard risk of coal mining of No. 5 #yun6# coal mining in the lower part of the eastern wing area is greater. 4) The appropriate amount of water should be released from the Daqing limestone aquifer, The water level of the aquifer and the water pressure on the roof can be reduced. To sum up, based on the measured water discharge data of the mine field and the numerical simulation software of Visual Modflow GMS groundwater, the aquifer in the study area is simulated with numerical simulation method and the water discharge rate is predicted and analyzed. It is concluded that hydrophobic depressurization can effectively reduce the risk of water inrush from bottom plate in the mining of 5 #jiao 6 # coal in this area.
【學(xué)位授予單位】：石家莊經(jīng)濟(jì)學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD745

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