Abstract: Mining loss rate and ore dilution rate are important indexes characterizing the mining technology and management level of a mining enterprise. In view of the practical problems of large amount of work, difficult operation and inaccurate measured data in the conventional dilution and loss measurement, a new calculation method for mining dilution and loss based on CMS precision survey is proposed. The working principle of CMS and its survey process for the cavity are described and the concrete method of calculating the mining dilution and loss based on CMS survey is elucidated. With the precision survey of the cavity in Dongguashan Copper Mine as the real case, Surpac software for 3D design of mine was used to create the 3D models for the cavity, the design unit of stope and its bottom structure. Through the Boolean operation between the models, the accurate data of the real boundary and volume of the mined-out area, and the over-excavated amount, under-excavated amount and the remaining reserve in the cavity were obtained so that the mining dilution rate and loss rate were calculated accurately.

Key words: CMS, 3D model, Dilution rate, Loss rate