云南蒙自白牛厂银多金属矿区对门山矿段水文地质特征及涌水量预测

Comparative analysis of prediction methods of mine water inflow in Duimenshan Mine Section of Bainiuchang silver polymetallic mining area in Mengzi,Yunnan Province

云南省蒙自市白牛厂银多金属矿区位于薄竹山拱褶北西部的北东向短轴背斜北东倾伏端,其中对门山矿段位于该矿区中北部。通过对矿区的水文地质特征分析,采用比拟法与解析法进行矿坑涌水量预测。结果表明:在预测矿井最低排水标高1595 m条件下,根据已有采集与观测的矿区资料为依据采用的比拟法计算的旱季涌水量为7798.47 m^(3)/d,雨季涌水量为15352.99 m^(3)/d;在稳定流条件下采用潜水井的Dupuit公式计算出的旱季涌水量4354.41 m^(3)/d,雨季涌水量8584.91 m^(3)/d。将计算方法和结果与矿区实际情况进行综合分析后得出,采用比拟法预测矿坑涌水量结果更可靠,可信度更高。

The Bainiuchang silver-polymetallic mining area in Mengzi City,Yunnan Province,is located at the NE tilting end of the NE-trending short-axis anticline in the northwest of the Bozhushan arch fold,and the Duimenshan ore section is located in the north-central part of the mining area.Based on the analysis of the hydrogeological characteristics of the mining area,the analogy method and analytical method are used to predict the water inflow of the mine.The results show that under the condition of predicting the lowest drainage elevation of 1595 m,according to the data collected and observed in mining area,the water inflow in dry season is 7798.47 m^(3)/d,and that in rainy season is 15352.99 m^(3)/d.Under the condition of steady flow,the water inflow calculated by the Dupuit formula of the submersible well is 4354.41 m^(3)/d in dry season and 8584.91 m^(3)/d in rainy season.Based on the comprehensive analysis of the calculation method and results and the actual situation of the mining area,it is concluded that the prediction of pit water inflow by the analogy method is more reliable and more reliable.