Rock-fill Material Mining and Quality Control for the Dam of Batang Hydropower Project
In view of the difficulties in mining rock-fill materials for the dam of the Batang Hydropower Project,a study on the mining and quality control of the dam materials was carried out.According to the blasting min-ing test at the site,the broken rock mass and the cut and developed crack are the main reasons that the rockfill material mining cannot meet the design gradation requirement,under the rock mass condition of the left bank key structure slope of the Batang Hydropower Project,it is difficult to collect the rockfill material that meets the design requirements by adjusting the blasting parameters.Although there are more fine particles and worse gradation in the excavated materials of the left bank project of the Batang Hydropower Project,the physical characteristics of the rockfill materials were obtained through laboratory and field compaction tests,the rock-fill material of the dam was finally selected to excavate the slope of the left bank key building,and the blasting parameters,filling and rolling construction parameters of the rock-fill material were determined to ensure the mining and filling quality of the rock-fill material of the dam,the project investment was saved,and new rock-fill quarrying sites were prevented from damaging the fragile ecological environment of the Tibetan plateau in the upstream of Jinsha River,resulting in better economic and social benefits.
Rock fragmentationDam material miningBlasting testGrain gradationBatang Hydropower Pro-jectQuality control
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