个旧锡矿高峰山矿段开采期渗流场数值模拟及涌水量预测

【作者】 李赛；

【导师】 范柱国；

【作者基本信息】 昆明理工大学 ， 地质工程， 2009， 硕士

【摘要】 随着探矿、采矿技术的高速发展,更深层的矿床不断被发现,探矿、采矿过程中地下水的危害及影响也越来越大。如何较为准确的模拟地下水渗流场及预测巷道涌水量的大小,为巷道施工制定合理的防排水措施提供依据,成为日益关注的课题之一。本文以个旧矿区高峰山矿段为研究对象,在前人研究的基础上,通过野外地质调查及矿段水文地质特征分析,建立概念模型与数学模型,利用GMS软件,运用有限差分法,对1650中段开拓及使用期进行数值模拟,预测1650中段开拓及使用期地下水渗流场及涌水量变化情况。研究表明：1、矿段地层岩溶岩组、地质构造、表层岩溶及地下水运动控制岩溶发育特征,从而控制矿段含水岩组的划分、水文地质参数递变规律、地下水补径排等水文地质特征。2、矿段地下水动态成因类型属于气象型,大气降雨是主要补给源；径流模态为波态型,地下水径流具有一定深度、长度及明显的垂直分带性；地下水排泄主要是侧向排泄及巷道涌水。3、建立模拟区水文地质概念模型、数学模型,通过多次校正与调参,获取了一套符合高峰山矿段实际水文地质条件的渗透系数、给水度等水文地质参数,并实现了地下水运动三维可视化。4、通过数值模型预测：(1)1650中段2008年开拓期,1650巷道涌水量为1.21×10"m3,月平均最大涌水量约为8600 m3/d,日最大涌水量约为9100 m3/d；1800巷道涌水量为6.1×104m3,月平均最大涌水量约为1000m3/d,日最大涌水量约为1700 m3/d；(2)1650中段2009年使用期,1650巷道涌水量为0.77×106m3,月平均最大涌水量约为7800 m3/d,日最大涌水量约为8700 m3/d；1800巷道无明显涌水量；(3)2010年以后,模拟区地下水补给、排泄基本达到均衡,呈稳定形态,每年渗流场及涌水量变化情况与2009年情况大致相同,受大气降水影响有小幅度的变化。更多还原

【Abstract】 With the rapid development of the technology about prospecting and mining, the deeper deposits had been found, and the harm brought from the prospecting and mining activities increased obviously. So how to make the simulation to the groundwater seepage field and take the prediction of water inflow of the roadway more accuratly can provide the basis for making the reasonable measures to prevent drainage in the roadway construction, and become one of the topics of increasing concern.The paper takes the ore section of Gao-feng mountain in Gejiu mining areas as the research object. On the basis of previous studies, the paper sets up the conceptual model and the mathematical model by means of massive field geological survey and the mineral paragraph hydrogeological characteristics analysis. By using GMS software and the finite difference method, the study takes the numerical simulation to the development and useful life for the middle section of the 1650 and makes the prediction of the changes of the groundwater seepage field and water inflow during the development and useful life to the 1650’s middle section. The study shows that:1. The formation’s karst petrofabric in ore section, the geological structure, the surficial karst and the groundwater activity control the characteristics of karst development, which controls the hydrogeology characteristics including the division of the aquiferous rock formations, the rules of change to the hydro-geological parameters and the groundwater’s recharge, runoff and excretion etc.2. The genetic type of the groundwater’s dynamic belongs to the Weather-type and the atmospheric precipitation is the main supply source. The mode of run-off is the Wave-State type and the groundwater’s runoff has a certain depth, length and has the obvious vertical zonation. The discharge of groundwater is mainly lateral excretion and the roadway water gushing.3. The study sets up the hydrogeological conceptual model and mathematical model in the simulation area, and by means of repeated calibration and scheduling, which obtained a set of hydrogeological parameters including permeability coefficient and specific yield etc. and realized the actual hydro-geological conditions to ore section of Gao-feng mountain.4. The paper made the prediction through the numerical model:(1) In the 1650’s middle section in the opening period of 2008, the water inflow of 1650 roadway is 1.21×106m3, the maximum monthly average inflow of water is 8600 m3/d, the maximum daily inflow is 9100 m3/d. And the water inflow of roadway 1800 is 6.1×104m3, the maximum monthly average inflow is 1000 m3/d, the maximum daily inflow is 1700 m3/d.(2) In the 1650’s middle section in the using period of 2009, the water inflow of roadway 1650 is 0.77×106m3, the maximum monthly average inflow of water is 7800 m3/d, the maximum daily inflow of water is 8700 m3/d; but the roadway 1800 had not water inflow obviously(3) After 2010, the groundwater’s recharge and excretion will tend to be a balance in the simulation area, and will show the stable morphology, the annual seepage field and the change of water inflow is the same to the situation in 2009 approximately, and will be changed with a small margin by the atmospheric precipitation.更多还原