胜利露天矿内排土场现场原位试验研究

Filed in-situ test on internal waste dump of Shengli open-pit mine

以胜利露天矿内排土场为工程背景,针对内排土场地下水情况不明以及排弃物渗透性参数不详等难题,设计了水文钻探、示踪连通试验以及分层压水试验等现场原位试验。试验结果表明,现场原位试验具有操作简便、数据客观等优点,对露天矿内排土场填土区域水文地质参数的获得十分必要。探明了胜利露天矿内排土场地下水流场分布情况,地下水主要从东帮向内排土场方向入渗且水位逐渐降低;南北水仓可能与内排土场中地下水存在一定的水力联系,投源孔ZK3和观测孔ZK7直线方向更接近于地下水主流方向。内排土场区域渗透系数差异较大,渗透系数在填土层深度方向上出现了明显分层现象,上层区域渗透性较大,下层区域渗透性较小。

Aimed at problem of the dumping site groundwater situation was unclear and the discard permeability parameters were unknown,the authors designed and implemented the hydrologic drilling,tracer connectivity test,stratified water pressure test and other filed in-situ tests under the engineering background of in internal waste dump of Shengli open-pit mine.The results showed that the field insitu test had advantages of easy operating,data objectively and so on,which is necessary to obtain the hydrogeological parameters of the openpit mine internal waste dump filling area.According to the test,the distribution of groundwater flow field was ascertained in Shengli openpit mine,the groundwater mainly infiltrated from the east site of internal waste dump and the water level gradually decreased,the south and north water storage were likely have some hydraulic connection with the groundwater in the dump,the straight line direction was closer to the mainstream of groundwater direction between fling source hole ZK3 and observation hole ZK7,the permeability coefficient was quite different in the internal waste dump which showing obvious stratification in the direction of different fill depths,and the permeability coefficient of the upper region was larger than the lower region.