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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。
Wanhe fly ash storage yard is located in the typical peak cluster depression in central Guizhou, and there is serious seepage of yard waste water. In order to accurately evaluate the leakage characteristics, corresponding hydrogeological exploration and connectivity tests were conducted in and around the yard. The results show that the underground water level in the yard is lower than the adjacent Beiyu River water level by 6.5 m, and it is impossible for the yard waste water to leak into the Beiyu River. Instead, it crosses over the F 1 fault to the west from the Feng Fai zone on the north west side of the ash field S2 Tam near the valley 3 km away, S3 spring leakage. Leakage points are bead-shaped water holes distributed in depressions in the depressions, and the seepage is fissure pipe type. The groundwater flow velocity is 57.2 m / h, and the seepage hydrodynamic conditions are complex. The yard leachate pollution seepage control not only solves the seepage prevention of bead-shaped water hole in the yard, but also ensures the seepage prevention of karst in the mountainous zonal gas-bearing zone on the north side of the yard. Therefore, horizontal seepage control plan is suggested.