加给陇洼矿区首采区矿井涌水量计算方法及其可靠度研究

Study on calculation method and reliability of mine water inflow in initial mining area of Jiageilongwa mining area

在多年冻土区和季节冻融区,矿井涌水量计算和预测是一个值得研究的课题。根据青海加给陇洼矿区水文地质条件,采用数值法和解析法对加给陇洼矿区首采区矿井涌水量进行计算和分析。结果表明:加给陇洼矿区地下水的补给、径流和排泄的边界条件,明显受到冻融循环条件的干扰,地下水补给以冻土融水为主。用数值法和解析法在青海加给陇洼首采区矿井涌水量计算和预测的过程中,数值法计算和预测精度为C级,可信度为0.4;解析法预测精度为D级,可信度为0.3,采用数值法计算和预测结果的可靠度高于解析法,为青海冻土区首采区矿井涌水量计算和预测提供了基础数据,对青藏高原冻土区矿井涌水量计算和预测具有很好的参考意义。

In permafrost regions and seasonal freezing-thawing regions,mine water inflow's calculation and prediction is a subject worth studying.According to the hydrogeological conditions of Qinghai Jiageilongwa mining,numerical method and analytic method are used to calculate and analyze the initial mining water inflow of Jiageilongwa mining.The results show that the boundary conditions of recharge,runoff and discharge of groundwater in Jiageilongwa mining are obviously disturbed by the freezing-thawing cycle conditions.Using numerical method and analytical in the process of calculation and prediction of initial mine water inflow in Qinghai Jiageilongwa mining,the prediction accuracy of numerical method is grade C and the reliability is 0.4,the prediction accuracy of analytical method is D grade and the reliability is 0.3.The reliability of numerical calculation and prediction results is higher than that of analytic method,which provides basic data for calculation and prediction of initial ! mining water inflow of Qinghai cryolithozone,and has a good reference significance for calculation and prediction of mine water inflow in the Qinghai-Tibet plateau cryolithozone.