湾河粉煤灰堆场岩溶渗漏评价  

Evaluation on karst leakage of coal ash site in Wanhe

作　　者：丁坚平[1] 段先前[1] 段黎[1] 曹兴民[1] 杨绍萍[1] 

机构地区：[1]贵州大学资源与环境工程学院,贵州贵阳550003

出　　处：《中国岩溶》2009年第4期381-384,共4页Carsologica Sinica

基　　金：贵州省自然科学基金项目(3018号)

摘　　要：湾河粉煤灰堆场位于黔中典型的峰丛洼地中,存在严重的堆场废水渗漏。为确切评价其渗漏特征,在堆场及其周围开展了相应的水文地质勘探及连通试验。结果表明,堆场地下水位低于邻近的波玉河水位6.5 m,堆场废水不可能向波玉河发生渗漏,而是越过灰场北西侧峰丛地带沿F 1断层向西距堆场约3 km以外的邻谷的S2潭、S3泉渗漏。渗漏点为堆场洼地中分布的串珠状落水洞,渗漏为裂隙管道型,地下水流速为57.2 m/h,渗漏水动力条件复杂。堆场废水污染渗漏治理不仅要解决堆场中串珠状落水洞的防渗,而且要保证堆场北侧山体包气带岩溶的防渗,因此建议采用水平防渗方案。Coal ash site in Wanhe is located in the typical peak-cluster depression in central Guizhou.Serious polluted water leakage exists in the site.To evaluate the leakage characteristics exactly,the hydro-geological exploratory works and connectivity tests have been carried out around the site.The results show that the groundwater table under the site is 6.5 meters lower than the adjacent water level of the Boyu River.Thus,the waste water of the site can not leak to the Boyu River.In fact,waste water runs across the peak cluster region at the northwest of coal ash site and leaks along the F1 fault towards west into S2 and S3 springs in the neighboring valley which is beyond 3 km from the sit.The leakage points are the beady sink-holes which are scattered over the depression in the coal ash site,and the leakage is in the type of pipe fissure.Flow velocity of groundwater is 57.2 m/h,and hydrodynamic condition of the leakage is complicated.Water pollution leakage evaluation on the site is not only to solve seepage-proofing of beady sink-holes in the site,but also to ensure karst seepageproofing of unsaturated zone at the north of the site.Therefore,it is suggested project of horizontal seepage-proofing be adopted.

关 键 词：粉煤灰堆场 峰丛洼地 渗漏评价 防渗处理 贵州湾河 

分 类 号：P642.2[天文地球—工程地质学]