Innovations and New Technologies in the Collection and Production of Naruse Dam Raw Stone

Abstract

Naruse Dam is a trapezoidal CSG type dam, and the concrete aggregate and CSG material, which are the materials of the dam body, are taken from the same mountain. In recent years, it has been required to improve the collection rate of raw stones for aggregate or CSG matrix in dam construction. Since CSG materials are produced only by crushing locally generated materials, the quality of CSG materials varies greatly, and it is necessary to monitor the material properties by laboratory tests during production. Therefore, a system for continuously monitoring particle size and surface water content of crushed materials produced using image analysis and RI moisture meter was applied to the crushed materials of quarry sites, and the effectiveness of the system was confirmed. In this paper, the outline and application result of the simple and rapid evaluation method adopted for the improvement of the extraction rate of the source rock base metal and the continuous monitoring system of particle size and moisture content of CSG material are shown.