冀中能源集团公司某矿放水试验数值模拟

发布时间：2018-04-23 08:17

本文选题：地下水 + 数值模拟　；参考：《石家庄经济学院》2015年硕士论文

【摘要】：水害是煤矿的主要灾害之一,不但威胁生命还影响正常工业生产。其中底板突水是煤矿水害主要组成部分。采用数值法对客观事物进行研究,普遍存在各个学科和领域中。采用数值法来研究地下水运动规律一直是水文地质上的热点。研究对象将选择水害严重的峰峰五矿的东翼区,对于探讨该地区疏水降压、安全生产有一定的意义,并可为类似地区提供参考。本文通过对峰峰五矿东翼区的实测数据展开研究,依托于对东翼区大青灰岩放水试验的实测数据,对研究含水层-大青灰岩地质及水文地质情况进行分析、归纳、概化,并建立与之相类似的数学模型。通过引用世界上先进的Visual Modflow、GMS地下水数值模拟软件在数学模型的基础上进行数值模拟。根据承压含水层水位和水压之间的关系运用突水系数法对上伏5#、6#煤进行突水系数评估。在此基础上运用已经建立的数值模型进行保证上伏5#、6#煤安全生产的条件下,大青灰岩含水层需要疏放的水量的预测。研究取得几点认识:1)东翼区大青灰岩含水层水平渗透系数5~16 m/d,垂向为水平的十分之一,贮水系数1.0×10~(-5)~4.0×10~(-5),越流系数4×10~(-4)~4×10~(-6)。2)通过放水,全区水位平均下降20m,水位在12~24小时达到平衡,关闭放水井水位迅速恢复,说明大青灰岩含水层水量补给丰富但也易于疏水降压。3)东翼区大青灰岩对5#、6#煤突水系数分别为0.051~0.094、0.102~0.499,如果不采取防治措施东翼区下组5#、6#煤开采受到水害风险较大。4)通过对于大青灰岩含水层采取适当的量放水,能够降低该含水层的水位和对顶板的水压力。综上所述,以数值法为研究手段,以井田实测放水数据为基础,依托于Visual Modflow、GMS地下水数值模拟软件对研究区含水层进行放水试验数值模拟,以及放水量预测分析后,认为通过采用疏水降压能够有效的降低该区域5#、6#煤开采时底板突水的风险。
[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.
【学位授予单位】：石家庄经济学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD745

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