Development of the integrated orepass management system

1)设计并开发了用于散装固体的剪切单元，其包含有效直径达20 mm的粗颗粒，该有效直径被认为是影响其内聚力的最大尺寸。和东美（新泻县）在几种含水率下进行采石。3）现场数据通讯系统，实现了动态区传输速度、休止角等溜井监测数据的双向传输;控制室、地面和地下办公室之间的专家系统和其他信息的指示。4）通过与一位经验丰富的矿石溜井工头的访谈，将防止内聚拱形成的决策标准系统化，该工头负责监督现场的日常混合控制。因此，专家系统“Motysson”，它提供了一个现场散装混合的指示，根据矿石溜井监测数据已经开发。5）连续散装电阻率测量已经进行了使用1/50比例模型的矿石溜井系统的头米采石场，由丙烯酸矿石溜井安装了一对弯曲的电极比电阻测量和不锈钢底部结构。结果表明，散装固体的比电阻与含水率密切相关，尤其是在低于0.5%的范围内。

1) Shear cell for bulk solids, containing coarse granules with an effective diameter up to 20mm which is supposed to be the maximum size influencing their cohesion, has been designed and develped.2) Shear test, using above apparatus, for bulk limestone samples taken at both Buko (Saitama pref.) and Toumi (Niigata pref.) quarries has been performed under several water content ratios. As a result, relations between critical orepass diameter, which indicates the minimum required diameter to prevent cohesive arch formation, and both water content ratio and advanced consolidation pressure have been clarified.3) In situ data communications system for mutual transmission of orepass monitoring data, such as transission velocity of a dynamic area, angle of repose, etc., indication by the expert system and other information, among control room, surface and underground offices, has been developed.4) Decision criteria to prevent cohesive arch formation were systematized through interview to an experienced orepass foreman, who is supervising daily on-site blending control. As a consequence an expert system "Motysson", which provides an indication for on-site bulk blending, based on the orepass monitoring data has been developed.5) Continuous bulk specific resistance measurement has been performed using 1/50 scale model of the orepass system of Toumi quarry, made by acrylic orepass installed with a curved pair of electrodes for specific resistance measurement and stainless steel bottom structure. As a result, it is shown that specific resistance of bulk solids depend sharply on water content ratio especially in the range lower than 0.5%.