浙西峡口萤石矿、长台萤石矿水文地质参数对比分析研究及涌水量预测

发布时间：2018-04-16 02:11

本文选题：水文地质条件 + 水文地质参数　；参考：《东华理工大学》2015年硕士论文

【摘要】：矿井涌水量是矿山安全生产设计、合理开发的重要依据,其涌水量预测的可靠程度直接影响矿床开采的合理性和安全性。目前涌水量预测主要利用水文地质参数进行计算,不同水文地质条件决定了不同的水文地质参数,因此,水文地质参数的对比分析对矿井涌水量预测有重要意义。本文以地质条件相似、地貌条件不同的峡口、长台萤石矿区为例,采用抽水试验法确定水文地质参数,用综合分析法对比分析水文地质参数,并用“大井法”、“集水廊道法”、“比拟法”预测涌水量。主要结论如下:(1)在研究区域内地下水共划分为3类:松散岩类孔隙水;基岩风化裂隙水;构造裂隙水。区域地下水位埋深较浅,地下水水位受地形变化和降雨量变化的影响较大,地下水流向与地形坡向大致一致,地下水分水岭与地表水分水岭一致。峡口矿区地下水补给水源以大气降水入渗补给为主,为HCO3-Ca型水,水文地质条件简单。长台矿区有大面积溶蚀塌陷,地下水补给以大气降水和地表径流入渗补给为主,为HCO3-Ca-Na型水,水文地质条件复杂。矿井充水水源为大气降水、地表水、裂隙水和采空区积水,充水通道为人工通道、导水钻孔、各类裂隙。(2)峡口矿区混合渗透系数为0.0446m/d,导水系数为4.9 m2/d,弹性释水系数为5.04×10-3,单位涌水量(110 mm孔径)为0.0849L/s·m;长台矿区混合渗透系数为0.0337m/d,导水系数为1.93m2/d,弹性释水系数为1.08×10-4,单位涌水量(91mm孔径)为0.0291 L/s·m。峡口矿区位于补给区,地下水运动呈非稳定态;长台矿区位于径流区,地下水运动呈稳定态。两矿区含水层(带)均为弱富水性,弱透水性,峡口矿区含水层(带)渗透性、富水性强于长台矿区。(3)根据矿区水文地质条件,并结合老采区涌水量变化规律,选取“集水廊道法”预测涌水量为未来矿井最小涌水量,“比拟法”预测涌水量为最大涌水量。峡口矿区243 m、203 m、163 m标高最小涌水量分别为为29 m3/d、196.24 m3/d、252.66 m3/d,最大涌水量分别为73.16 m3/d、206 m3/d、371 m3/d。长台矿区74 m、-36 m标高最小涌水量分别为228.62 m3/d、190.70 m3/d,最大涌水量分别为1734 m3/d、3726 m3/d。
[Abstract]:Mine water discharge is an important basis for the design and rational development of mine safety production. The reliability of its water inflow prediction directly affects the rationality and safety of mining.At present, hydrogeological parameters are mainly used to calculate water inflow, and different hydrogeological conditions determine different hydrogeological parameters. Therefore, the comparative analysis of hydrogeological parameters is of great significance to the prediction of mine water inflow.Taking the Xiakou and Changtai fluorite ore areas with similar geological conditions and different geomorphological conditions as examples, the hydrogeological parameters are determined by pumping test method, the hydrogeological parameters are analyzed by comprehensive analysis method, and the "large well method" is used to analyze the hydrogeological parameters.The method of catchment corridor and the method of analogy are used to predict the inflow of water.The main conclusions are as follows: (1) groundwater in the study area is divided into three categories: loose rock pore water, bedrock weathered fissure water and tectonic fissure water.The groundwater level is affected greatly by the changes of topography and rainfall, the direction of groundwater flow is roughly consistent with the slope of topography, and the watershed of groundwater is consistent with the watershed of surface water.The groundwater recharge source in Xiakou mining area is dominated by atmospheric precipitation infiltration recharge, which is HCO3-Ca type water, and the hydrogeological conditions are simple.There is a large area of dissolution and collapse in Changtai mining area, and the recharge of groundwater is dominated by atmospheric precipitation and surface runoff infiltration, which is HCO3-Ca-Na type water, and the hydrogeological conditions are complex.The water source for mine water filling is precipitation, surface water, fissure water and water in goaf.The mixed permeability coefficient of Xiakou mining area is 0.0446 m / d, the water conductivity coefficient is 4.9 m ~ 2 / d, the elastic water release coefficient is 5.04 脳 10 ~ (-3), the pore diameter of unit inflow is 110mm), the mixing permeability coefficient of Changtai mining area is 0.0337 mm / d, the water conductivity coefficient is 1.93 m ~ (-2) d, and the elastic water release coefficient is 1.08 脳 10 ~ (-4).The pore diameter per unit inflow is 0.0291 L / s / s m.Xiakou mining area is located in recharge area, groundwater movement is unstable, Changtai mining area is located in runoff area, and groundwater movement is stable.The aquifer (zone) of the two mining areas is both weakly water-rich and weak permeable, and the aquifer (zone) of Xiakou mining area is permeable, which is stronger than that of Changtai mining area. (3) according to the hydrogeological conditions of the mining area and combined with the law of water discharge in the old mining area,The "catchment corridor method" is chosen as the minimum water inflow in the future, and the "analogy method" is used to predict the maximum water inflow.In Xiakou mining area, the minimum water inflow at the elevation height of 243 m ~ (3 / d) and 163 m ~ (-1) is 29 m3 / d ~ 196.24 m ~ (3 / d) ~ (252.66) m ~ (3 / d), respectively, and the maximum discharge is 73.16 m ~ (-3) / d ~ (-1) ~ (206) m ~ (3 / d) ~ (-1) m ~ (3 / d).The minimum water inflow at the elevation of 74 m ~ 36 m in Changtai mining area is 228.62 m3 / d ~ 190.70 m ~ (3 / d), respectively, and the maximum water inflow is 1734 m ~ (3 / d) ~ 3 726 m ~ (3 / d) 路d ~ (-1) respectively.
【学位授予单位】：东华理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.4

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